Merge remote-tracking branch 'remotes/origin/master' into shibboleth

# Conflicts:
#	src/app/shared/shared.module.ts

.travis.yml

@@ -22,6 +22,11 @@ before_install:
   - sudo mv docker-compose /usr/local/bin
 
 install:
+  # update chrome
+  - wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | sudo apt-key add -
+  - sudo sh -c 'echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google-chrome.list'
+  - sudo apt-get update
+  - sudo apt-get install google-chrome-stable
   # Start up DSpace 7 using the entities database dump
   - docker-compose -f ./docker/docker-compose-travis.yml up -d
   # Use the dspace-cli image to populate the assetstore.  Trigger a discovery and oai update

config/environment.default.js

@@ -185,6 +185,11 @@ module.exports = {
       undoTimeout: 10000 // 10 seconds
     }
   },
+  collection: {
+    edit: {
+      undoTimeout: 10000 // 10 seconds
+    }
+  },
   theme: {
     name: 'default',
   }

e2e/app.e2e-spec.ts

@@ -13,7 +13,7 @@ describe('protractor App', () => {
   });
 
   it('should contain a news section', () => {
-    page.navigateTo();
-    expect<any>(page.getHomePageNewsText()).toBeDefined();
+    page.navigateTo()
+      .then(() => expect<any>(page.getHomePageNewsText()).toBeDefined());
   });
 });

e2e/app.po.ts

@@ -11,6 +11,6 @@ export class ProtractorPage {
   }
 
   getHomePageNewsText() {
-    return element(by.xpath('//ds-home-news')).getText();
+    return element(by.css('ds-home-news')).getText();
   }
 }

e2e/search-page/search-page.e2e-spec.ts

@@ -11,15 +11,17 @@ describe('protractor SearchPage', () => {
 
   it('should contain query value when navigating to page with query parameter', () => {
     const queryString = 'Interesting query string';
-    page.navigateToSearchWithQueryParameter(queryString);
-    page.getCurrentQuery().then((query: string) => {
+    page.navigateToSearchWithQueryParameter(queryString)
+      .then(() => page.getCurrentQuery())
+      .then((query: string) => {
         expect<string>(query).toEqual(queryString);
       });
   });
 
   it('should have right scope selected when navigating to page with scope parameter', () => {
-    const scope: promise.Promise<string> = page.getRandomScopeOption();
-    scope.then((scopeString: string) => {
+    page.navigateToSearch()
+      .then(() => page.getRandomScopeOption())
+      .then((scopeString: string) => {
         page.navigateToSearchWithScopeParameter(scopeString);
         page.getCurrentScope().then((s: string) => {
           expect<string>(s).toEqual(scopeString);
@@ -28,8 +30,9 @@ describe('protractor SearchPage', () => {
   });
 
   it('should redirect to the correct url when scope was set and submit button was triggered', () => {
-    const scope: promise.Promise<string> = page.getRandomScopeOption();
-    scope.then((scopeString: string) => {
+    page.navigateToSearch()
+      .then(() => page.getRandomScopeOption())
+      .then((scopeString: string) => {
         page.setCurrentScope(scopeString);
         page.submitSearchForm();
         browser.wait(() => {

resources/i18n/en.json5

@@ -338,8 +338,40 @@
 
   "collection.edit.tabs.roles.title": "Collection Edit - Roles",
 
+  "collection.edit.tabs.source.external": "This collection harvests its content from an external source",
+
+  "collection.edit.tabs.source.form.errors.oaiSource.required": "You must provide a set id of the target collection.",
+
+  "collection.edit.tabs.source.form.harvestType": "Content being harvested",
+
+  "collection.edit.tabs.source.form.head": "Configure an external source",
+
+  "collection.edit.tabs.source.form.metadataConfigId": "Metadata Format",
+
+  "collection.edit.tabs.source.form.oaiSetId": "OAI specific set id",
+
+  "collection.edit.tabs.source.form.oaiSource": "OAI Provider",
+
+  "collection.edit.tabs.source.form.options.harvestType.METADATA_AND_BITSTREAMS": "Harvest metadata and bitstreams (requires ORE support)",
+
+  "collection.edit.tabs.source.form.options.harvestType.METADATA_AND_REF": "Harvest metadata and references to bitstreams (requires ORE support)",
+
+  "collection.edit.tabs.source.form.options.harvestType.METADATA_ONLY": "Harvest metadata only",
+
   "collection.edit.tabs.source.head": "Content Source",
 
+  "collection.edit.tabs.source.notifications.discarded.content": "Your changes were discarded. To reinstate your changes click the 'Undo' button",
+
+  "collection.edit.tabs.source.notifications.discarded.title": "Changed discarded",
+
+  "collection.edit.tabs.source.notifications.invalid.content": "Your changes were not saved. Please make sure all fields are valid before you save.",
+
+  "collection.edit.tabs.source.notifications.invalid.title": "Metadata invalid",
+
+  "collection.edit.tabs.source.notifications.saved.content": "Your changes to this collection's content source were saved.",
+
+  "collection.edit.tabs.source.notifications.saved.title": "Content Source saved",
+
   "collection.edit.tabs.source.title": "Collection Edit - Content Source",
 
 
@@ -382,6 +414,12 @@
 
 
 
+  "collection.source.update.notifications.error.content": "The provided settings have been tested and didn't work.",
+
+  "collection.source.update.notifications.error.title": "Server Error",
+
+
+
   "communityList.tabTitle": "DSpace - Community List",
 
   "communityList.title": "List of Communities",
@@ -532,6 +570,8 @@
 
   "error.validation.pattern": "This input is restricted by the current pattern: {{ pattern }}.",
 
+  "error.validation.filerequired": "The file upload is mandatory",
+
 
 
   "footer.copyright": "copyright © 2002-{{ year }}",
@@ -997,6 +1037,8 @@
 
   "loading.collections": "Loading collections...",
 
+  "loading.content-source": "Loading content source...",
+
   "loading.community": "Loading community...",
 
   "loading.default": "Loading...",
@@ -1425,6 +1467,8 @@
 
   "relationships.isVolumeOf": "Journal Volumes",
   
+  "relationships.isContributorOf": "Contributors",
+
 
 
   "search.description": "",
@@ -1627,8 +1671,67 @@
   "submission.general.save-later": "Save for later",
 
 
+
   "submission.sections.describe.relationship-lookup.close": "Close",
 
+  "submission.sections.describe.relationship-lookup.external-source.added": "Successfully added local entry to the selection",
+
+  "submission.sections.describe.relationship-lookup.external-source.import-button-title.Author": "Import remote author",
+
+  "submission.sections.describe.relationship-lookup.external-source.import-button-title.Journal": "Import remote journal",
+
+  "submission.sections.describe.relationship-lookup.external-source.import-button-title.Journal Issue": "Import remote journal issue",
+
+  "submission.sections.describe.relationship-lookup.external-source.import-button-title.Journal Volume": "Import remote journal volume",
+
+  "submission.sections.describe.relationship-lookup.external-source.import-modal.Author.title": "Import Remote Author",
+
+  "submission.sections.describe.relationship-lookup.external-source.import-modal.Author.added.local-entity": "Successfully added local author to the selection",
+
+  "submission.sections.describe.relationship-lookup.external-source.import-modal.Author.added.new-entity": "Successfully imported and added external author to the selection",
+
+  "submission.sections.describe.relationship-lookup.external-source.import-modal.authority": "Authority",
+
+  "submission.sections.describe.relationship-lookup.external-source.import-modal.authority.new": "Import as a new local authority entry",
+
+  "submission.sections.describe.relationship-lookup.external-source.import-modal.cancel": "Cancel",
+
+  "submission.sections.describe.relationship-lookup.external-source.import-modal.collection": "Select a collection to import new entries to",
+
+  "submission.sections.describe.relationship-lookup.external-source.import-modal.entities": "Entities",
+
+  "submission.sections.describe.relationship-lookup.external-source.import-modal.entities.new": "Import as a new local entity",
+
+  "submission.sections.describe.relationship-lookup.external-source.import-modal.head.lcname": "Importing from LC Name",
+
+  "submission.sections.describe.relationship-lookup.external-source.import-modal.head.orcidV2": "Importing from ORCID",
+
+  "submission.sections.describe.relationship-lookup.external-source.import-modal.head.sherpaJournal": "Importing from Sherpa Journal",
+
+  "submission.sections.describe.relationship-lookup.external-source.import-modal.head.sherpaPublisher": "Importing from Sherpa Publisher",
+
+  "submission.sections.describe.relationship-lookup.external-source.import-modal.import": "Import",
+
+  "submission.sections.describe.relationship-lookup.external-source.import-modal.Journal.title": "Import Remote Journal",
+
+  "submission.sections.describe.relationship-lookup.external-source.import-modal.Journal.added.local-entity": "Successfully added local journal to the selection",
+
+  "submission.sections.describe.relationship-lookup.external-source.import-modal.Journal.added.new-entity": "Successfully imported and added external journal to the selection",
+
+  "submission.sections.describe.relationship-lookup.external-source.import-modal.Journal Issue.title": "Import Remote Journal Issue",
+
+  "submission.sections.describe.relationship-lookup.external-source.import-modal.Journal Issue.added.local-entity": "Successfully added local journal issue to the selection",
+
+  "submission.sections.describe.relationship-lookup.external-source.import-modal.Journal Issue.added.new-entity": "Successfully imported and added external journal issue to the selection",
+
+  "submission.sections.describe.relationship-lookup.external-source.import-modal.Journal Volume.title": "Import Remote Journal Volume",
+
+  "submission.sections.describe.relationship-lookup.external-source.import-modal.Journal Volume.added.local-entity": "Successfully added local journal volume to the selection",
+
+  "submission.sections.describe.relationship-lookup.external-source.import-modal.Journal Volume.added.new-entity": "Successfully imported and added external journal volume to the selection",
+
+  "submission.sections.describe.relationship-lookup.external-source.import-modal.select": "Select a local match:",
+
   "submission.sections.describe.relationship-lookup.search-tab.deselect-all": "Deselect all",
 
   "submission.sections.describe.relationship-lookup.search-tab.deselect-page": "Deselect page",
@@ -1875,11 +1978,16 @@
 
   "uploader.drag-message": "Drag & Drop your files here",
 
-  "uploader.or": ", or ",
+  "uploader.or": ", or",
 
   "uploader.processing": "Processing",
 
   "uploader.queue-length": "Queue length",
 
+  "virtual-metadata.delete-item.info": "Select the types for which you want to save the virtual metadata as real metadata",
+
+  "virtual-metadata.delete-item.modal-head": "The virtual metadata of this relation",
+
+  "virtual-metadata.delete-relationship.modal-head": "Select the items for which you want to save the virtual metadata as real metadata",
 }
 

src/app/+collection-page/edit-collection-page/collection-source/collection-source.component.html

@@ -0,0 +1,56 @@
+<div class="container-fluid">
+  <div class="d-inline-block float-right">
+    <button class=" btn btn-danger" *ngIf="!(isReinstatable() | async)"
+            [disabled]="!(hasChanges() | async)"
+            (click)="discard()"><i
+      class="fas fa-times"></i>
+      <span class="d-none d-sm-inline">&nbsp;{{"item.edit.metadata.discard-button" | translate}}</span>
+    </button>
+    <button class="btn btn-warning" *ngIf="isReinstatable() | async"
+            (click)="reinstate()"><i
+      class="fas fa-undo-alt"></i>
+      <span class="d-none d-sm-inline">&nbsp;{{"item.edit.metadata.reinstate-button" | translate}}</span>
+    </button>
+    <button class="btn btn-primary" [disabled]="!(hasChanges() | async) || !isValid() || (initialHarvestType === harvestTypeNone && contentSource.harvestType === initialHarvestType)"
+            (click)="onSubmit()"><i
+      class="fas fa-save"></i>
+      <span class="d-none d-sm-inline">&nbsp;{{"item.edit.metadata.save-button" | translate}}</span>
+    </button>
+  </div>
+  <h4>{{ 'collection.edit.tabs.source.head' | translate }}</h4>
+  <div *ngIf="contentSource" class="form-check mb-4">
+    <input type="checkbox" class="form-check-input" id="externalSourceCheck" [checked]="(contentSource?.harvestType !== harvestTypeNone)" (change)="changeExternalSource()">
+    <label class="form-check-label" for="externalSourceCheck">{{ 'collection.edit.tabs.source.external' | translate }}</label>
+  </div>
+  <ds-loading *ngIf="!contentSource" [message]="'loading.content-source' | translate"></ds-loading>
+  <h4 *ngIf="contentSource && (contentSource?.harvestType !== harvestTypeNone)">{{ 'collection.edit.tabs.source.form.head' | translate }}</h4>
+</div>
+<ds-form *ngIf="formGroup && contentSource && (contentSource?.harvestType !== harvestTypeNone)"
+         [formId]="'collection-source-form-id'"
+         [formGroup]="formGroup"
+         [formModel]="formModel"
+         [formLayout]="formLayout"
+         [displaySubmit]="false"
+         (dfChange)="onChange($event)"
+         (submitForm)="onSubmit()"
+         (cancel)="onCancel()"></ds-form>
+<div class="container-fluid" *ngIf="(contentSource?.harvestType !== harvestTypeNone)">
+  <div class="d-inline-block float-right">
+    <button class=" btn btn-danger" *ngIf="!(isReinstatable() | async)"
+            [disabled]="!(hasChanges() | async)"
+            (click)="discard()"><i
+      class="fas fa-times"></i>
+      <span class="d-none d-sm-inline">&nbsp;{{"item.edit.metadata.discard-button" | translate}}</span>
+    </button>
+    <button class="btn btn-warning" *ngIf="isReinstatable() | async"
+            (click)="reinstate()"><i
+      class="fas fa-undo-alt"></i>
+      <span class="d-none d-sm-inline">&nbsp;{{"item.edit.metadata.reinstate-button" | translate}}</span>
+    </button>
+    <button class="btn btn-primary" [disabled]="!(hasChanges() | async) || !isValid() || (initialHarvestType === harvestTypeNone && contentSource.harvestType === initialHarvestType)"
+            (click)="onSubmit()"><i
+      class="fas fa-save"></i>
+      <span class="d-none d-sm-inline">&nbsp;{{"item.edit.metadata.save-button" | translate}}</span>
+    </button>
+  </div>
+</div>

src/app/+collection-page/edit-collection-page/collection-source/collection-source.component.spec.ts

@@ -0,0 +1,222 @@
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+import { TranslateModule } from '@ngx-translate/core';
+import { RouterTestingModule } from '@angular/router/testing';
+import { ActivatedRoute, Router } from '@angular/router';
+import { of as observableOf } from 'rxjs/internal/observable/of';
+import { NO_ERRORS_SCHEMA } from '@angular/core';
+import { CollectionSourceComponent } from './collection-source.component';
+import { ContentSource, ContentSourceHarvestType } from '../../../core/shared/content-source.model';
+import { ObjectUpdatesService } from '../../../core/data/object-updates/object-updates.service';
+import { INotification, Notification } from '../../../shared/notifications/models/notification.model';
+import { NotificationType } from '../../../shared/notifications/models/notification-type';
+import { FieldUpdate } from '../../../core/data/object-updates/object-updates.reducer';
+import { NotificationsService } from '../../../shared/notifications/notifications.service';
+import { DynamicFormControlModel, DynamicFormService } from '@ng-dynamic-forms/core';
+import { hasValue } from '../../../shared/empty.util';
+import { FormControl, FormGroup } from '@angular/forms';
+import { RouterStub } from '../../../shared/testing/router-stub';
+import { GLOBAL_CONFIG } from '../../../../config';
+import { By } from '@angular/platform-browser';
+import { Collection } from '../../../core/shared/collection.model';
+import { RemoteData } from '../../../core/data/remote-data';
+import { CollectionDataService } from '../../../core/data/collection-data.service';
+import { RequestService } from '../../../core/data/request.service';
+
+const infoNotification: INotification = new Notification('id', NotificationType.Info, 'info');
+const warningNotification: INotification = new Notification('id', NotificationType.Warning, 'warning');
+const successNotification: INotification = new Notification('id', NotificationType.Success, 'success');
+
+const uuid = '29481ed7-ae6b-409a-8c51-34dd347a0ce4';
+let date: Date;
+let contentSource: ContentSource;
+let fieldUpdate: FieldUpdate;
+let objectUpdatesService: ObjectUpdatesService;
+let notificationsService: NotificationsService;
+let location: Location;
+let formService: DynamicFormService;
+let router: any;
+let collection: Collection;
+let collectionService: CollectionDataService;
+let requestService: RequestService;
+
+describe('CollectionSourceComponent', () => {
+  let comp: CollectionSourceComponent;
+  let fixture: ComponentFixture<CollectionSourceComponent>;
+
+  beforeEach(async(() => {
+    date = new Date();
+    contentSource = Object.assign(new ContentSource(), {
+      uuid: uuid,
+      metadataConfigs: [
+        {
+          id: 'dc',
+          label: 'Simple Dublin Core',
+          nameSpace: 'http://www.openarchives.org/OAI/2.0/oai_dc/'
+        },
+        {
+          id: 'qdc',
+          label: 'Qualified Dublin Core',
+          nameSpace: 'http://purl.org/dc/terms/'
+        },
+        {
+          id: 'dim',
+          label: 'DSpace Intermediate Metadata',
+          nameSpace: 'http://www.dspace.org/xmlns/dspace/dim'
+        }
+      ]
+    });
+    fieldUpdate = {
+      field: contentSource,
+      changeType: undefined
+    };
+    objectUpdatesService = jasmine.createSpyObj('objectUpdatesService',
+      {
+        getFieldUpdates: observableOf({
+          [contentSource.uuid]: fieldUpdate
+        }),
+        saveAddFieldUpdate: {},
+        discardFieldUpdates: {},
+        reinstateFieldUpdates: observableOf(true),
+        initialize: {},
+        getUpdatedFields: observableOf([contentSource]),
+        getLastModified: observableOf(date),
+        hasUpdates: observableOf(true),
+        isReinstatable: observableOf(false),
+        isValidPage: observableOf(true)
+      }
+    );
+    notificationsService = jasmine.createSpyObj('notificationsService',
+      {
+        info: infoNotification,
+        warning: warningNotification,
+        success: successNotification
+      }
+    );
+    location = jasmine.createSpyObj('location', ['back']);
+    formService = Object.assign({
+      createFormGroup: (fModel: DynamicFormControlModel[]) => {
+        const controls = {};
+        if (hasValue(fModel)) {
+          fModel.forEach((controlModel) => {
+            controls[controlModel.id] = new FormControl((controlModel as any).value);
+          });
+          return new FormGroup(controls);
+        }
+        return undefined;
+      }
+    });
+    router = Object.assign(new RouterStub(), {
+      url: 'http://test-url.com/test-url'
+    });
+    collection = Object.assign(new Collection(), {
+      uuid: 'fake-collection-id'
+    });
+    collectionService = jasmine.createSpyObj('collectionService', {
+      getContentSource: observableOf(contentSource),
+      updateContentSource: observableOf(contentSource),
+      getHarvesterEndpoint: observableOf('harvester-endpoint')
+    });
+    requestService = jasmine.createSpyObj('requestService', ['removeByHrefSubstring']);
+
+    TestBed.configureTestingModule({
+      imports: [TranslateModule.forRoot(), RouterTestingModule],
+      declarations: [CollectionSourceComponent],
+      providers: [
+        { provide: ObjectUpdatesService, useValue: objectUpdatesService },
+        { provide: NotificationsService, useValue: notificationsService },
+        { provide: Location, useValue: location },
+        { provide: DynamicFormService, useValue: formService },
+        { provide: ActivatedRoute, useValue: { parent: { data: observableOf({ dso: new RemoteData(false, false, true, null, collection) }) } } },
+        { provide: Router, useValue: router },
+        { provide: GLOBAL_CONFIG, useValue: { collection: { edit: { undoTimeout: 10 } } } as any },
+        { provide: CollectionDataService, useValue: collectionService },
+        { provide: RequestService, useValue: requestService }
+      ],
+      schemas: [NO_ERRORS_SCHEMA]
+    }).compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(CollectionSourceComponent);
+    comp = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  describe('on startup', () => {
+    let form;
+
+    beforeEach(() => {
+      form = fixture.debugElement.query(By.css('ds-form'));
+    });
+
+    it('ContentSource should be disabled', () => {
+      expect(comp.contentSource.harvestType).toEqual(ContentSourceHarvestType.None);
+    });
+
+    it('the input-form should be hidden', () => {
+      expect(form).toBeNull();
+    });
+  });
+
+  describe('when selecting the checkbox', () => {
+    let input;
+    let form;
+
+    beforeEach(() => {
+      input = fixture.debugElement.query(By.css('#externalSourceCheck')).nativeElement;
+      input.click();
+      fixture.detectChanges();
+      form = fixture.debugElement.query(By.css('ds-form'));
+    });
+
+    it('should enable ContentSource', () => {
+      expect(comp.contentSource.harvestType).not.toEqual(ContentSourceHarvestType.None);
+    });
+
+    it('should send a field update', () => {
+      expect(objectUpdatesService.saveAddFieldUpdate).toHaveBeenCalledWith(router.url, comp.contentSource)
+    });
+
+    it('should display the form', () => {
+      expect(form).not.toBeNull();
+    });
+  });
+
+  describe('isValid', () => {
+    it('should return true when ContentSource is disabled but the form invalid', () => {
+      spyOnProperty(comp.formGroup, 'valid').and.returnValue(false);
+      comp.contentSource.harvestType = ContentSourceHarvestType.None;
+      expect(comp.isValid()).toBe(true);
+    });
+
+    it('should return false when ContentSource is enabled but the form is invalid', () => {
+      spyOnProperty(comp.formGroup, 'valid').and.returnValue(false);
+      comp.contentSource.harvestType = ContentSourceHarvestType.Metadata;
+      expect(comp.isValid()).toBe(false);
+    });
+
+    it('should return true when ContentSource is enabled and the form is valid', () => {
+      spyOnProperty(comp.formGroup, 'valid').and.returnValue(true);
+      comp.contentSource.harvestType = ContentSourceHarvestType.Metadata;
+      expect(comp.isValid()).toBe(true);
+    });
+  });
+
+  describe('onSubmit', () => {
+    beforeEach(() => {
+      comp.onSubmit();
+    });
+
+    it('should re-initialize the field updates', () => {
+      expect(objectUpdatesService.initialize).toHaveBeenCalled();
+    });
+
+    it('should display a success notification', () => {
+      expect(notificationsService.success).toHaveBeenCalled();
+    });
+
+    it('should call updateContentSource on the collectionService', () => {
+      expect(collectionService.updateContentSource).toHaveBeenCalled();
+    });
+  });
+});

src/app/+collection-page/edit-collection-page/collection-source/collection-source.component.ts

@@ -1,4 +1,37 @@
-import { Component } from '@angular/core';
+import { Component, Inject, OnDestroy, OnInit } from '@angular/core';
+import { AbstractTrackableComponent } from '../../../shared/trackable/abstract-trackable.component';
+import {
+  DynamicFormControlModel,
+  DynamicFormGroupModel,
+  DynamicFormLayout,
+  DynamicFormService,
+  DynamicInputModel,
+  DynamicOptionControlModel,
+  DynamicRadioGroupModel,
+  DynamicSelectModel,
+  DynamicTextAreaModel
+} from '@ng-dynamic-forms/core';
+import { Location } from '@angular/common';
+import { TranslateService } from '@ngx-translate/core';
+import { ObjectUpdatesService } from '../../../core/data/object-updates/object-updates.service';
+import { NotificationsService } from '../../../shared/notifications/notifications.service';
+import { FormGroup } from '@angular/forms';
+import { hasNoValue, hasValue, isNotEmpty } from '../../../shared/empty.util';
+import { ContentSource, ContentSourceHarvestType } from '../../../core/shared/content-source.model';
+import { Observable } from 'rxjs/internal/Observable';
+import { RemoteData } from '../../../core/data/remote-data';
+import { Collection } from '../../../core/shared/collection.model';
+import { first, map, switchMap, take } from 'rxjs/operators';
+import { ActivatedRoute, Router } from '@angular/router';
+import { FieldUpdate, FieldUpdates } from '../../../core/data/object-updates/object-updates.reducer';
+import { Subscription } from 'rxjs/internal/Subscription';
+import { cloneDeep } from 'lodash';
+import { GLOBAL_CONFIG, GlobalConfig } from '../../../../config';
+import { CollectionDataService } from '../../../core/data/collection-data.service';
+import { getSucceededRemoteData } from '../../../core/shared/operators';
+import { MetadataConfig } from '../../../core/shared/metadata-config.model';
+import { INotification } from '../../../shared/notifications/models/notification.model';
+import { RequestService } from '../../../core/data/request.service';
 
 /**
  * Component for managing the content source of the collection
@@ -7,6 +40,440 @@ import { Component } from '@angular/core';
   selector: 'ds-collection-source',
   templateUrl: './collection-source.component.html',
 })
-export class CollectionSourceComponent {
-  /* TODO: Implement Collection Edit - Content Source */
+export class CollectionSourceComponent extends AbstractTrackableComponent implements OnInit, OnDestroy {
+  /**
+   * The current collection's remote data
+   */
+  collectionRD$: Observable<RemoteData<Collection>>;
+
+  /**
+   * The collection's content source
+   */
+  contentSource: ContentSource;
+
+  /**
+   * The current update to the content source
+   */
+  update$: Observable<FieldUpdate>;
+
+  /**
+   * The initial harvest type we started off with
+   * Used to compare changes
+   */
+  initialHarvestType: ContentSourceHarvestType;
+
+  /**
+   * @type {string} Key prefix used to generate form labels
+   */
+  LABEL_KEY_PREFIX = 'collection.edit.tabs.source.form.';
+
+  /**
+   * @type {string} Key prefix used to generate form error messages
+   */
+  ERROR_KEY_PREFIX = 'collection.edit.tabs.source.form.errors.';
+
+  /**
+   * @type {string} Key prefix used to generate form option labels
+   */
+  OPTIONS_KEY_PREFIX = 'collection.edit.tabs.source.form.options.';
+
+  /**
+   * The Dynamic Input Model for the OAI Provider
+   */
+  oaiSourceModel = new DynamicInputModel({
+    id: 'oaiSource',
+    name: 'oaiSource',
+    required: true,
+    validators: {
+      required: null
+    },
+    errorMessages: {
+      required: 'You must provide a set id of the target collection.'
+    }
+  });
+
+  /**
+   * The Dynamic Input Model for the OAI Set
+   */
+  oaiSetIdModel = new DynamicInputModel({
+    id: 'oaiSetId',
+    name: 'oaiSetId'
+  });
+
+  /**
+   * The Dynamic Input Model for the Metadata Format used
+   */
+  metadataConfigIdModel = new DynamicSelectModel({
+    id: 'metadataConfigId',
+    name: 'metadataConfigId'
+  });
+
+  /**
+   * The Dynamic Input Model for the type of harvesting
+   */
+  harvestTypeModel = new DynamicRadioGroupModel<string>({
+    id: 'harvestType',
+    name: 'harvestType',
+    options: [
+      {
+        value: ContentSourceHarvestType.Metadata
+      },
+      {
+        value: ContentSourceHarvestType.MetadataAndRef
+      },
+      {
+        value: ContentSourceHarvestType.MetadataAndBitstreams
+      }
+    ]
+  });
+
+  /**
+   * All input models in a simple array for easier iterations
+   */
+  inputModels = [this.oaiSourceModel, this.oaiSetIdModel, this.metadataConfigIdModel, this.harvestTypeModel];
+
+  /**
+   * The dynamic form fields used for editing the content source of a collection
+   * @type {(DynamicInputModel | DynamicTextAreaModel)[]}
+   */
+  formModel: DynamicFormControlModel[] = [
+    new DynamicFormGroupModel({
+      id: 'oaiSourceContainer',
+      group: [
+        this.oaiSourceModel
+      ]
+    }),
+    new DynamicFormGroupModel({
+      id: 'oaiSetContainer',
+      group: [
+        this.oaiSetIdModel,
+        this.metadataConfigIdModel
+      ]
+    }),
+    new DynamicFormGroupModel({
+      id: 'harvestTypeContainer',
+      group: [
+        this.harvestTypeModel
+      ]
+    })
+  ];
+
+  /**
+   * Layout used for structuring the form inputs
+   */
+  formLayout: DynamicFormLayout = {
+    oaiSource: {
+      grid: {
+        host: 'col-12 d-inline-block'
+      }
+    },
+    oaiSetId: {
+      grid: {
+        host: 'col col-sm-6 d-inline-block'
+      }
+    },
+    metadataConfigId: {
+      grid: {
+        host: 'col col-sm-6 d-inline-block'
+      }
+    },
+    harvestType: {
+      grid: {
+        host: 'col-12',
+        option: 'btn-outline-secondary'
+      }
+    },
+    oaiSetContainer: {
+      grid: {
+        host: 'row'
+      }
+    },
+    oaiSourceContainer: {
+      grid: {
+        host: 'row'
+      }
+    },
+    harvestTypeContainer: {
+      grid: {
+        host: 'row'
+      }
+    }
+  };
+
+  /**
+   * The form group of this form
+   */
+  formGroup: FormGroup;
+
+  /**
+   * Subscription to update the current form
+   */
+  updateSub: Subscription;
+
+  /**
+   * The content harvesting type used when harvesting is disabled
+   */
+  harvestTypeNone = ContentSourceHarvestType.None;
+
+  /**
+   * The previously selected harvesting type
+   * Used for switching between ContentSourceHarvestType.None and the previously selected value when enabling / disabling harvesting
+   * Defaults to ContentSourceHarvestType.Metadata
+   */
+  previouslySelectedHarvestType = ContentSourceHarvestType.Metadata;
+
+  /**
+   * Notifications displayed after clicking submit
+   * These are cleaned up every time a user submits the form to prevent error or other notifications from staying active
+   * while they shouldn't be.
+   */
+  displayedNotifications: INotification[] = [];
+
+  public constructor(public objectUpdatesService: ObjectUpdatesService,
+                     public notificationsService: NotificationsService,
+                     protected location: Location,
+                     protected formService: DynamicFormService,
+                     protected translate: TranslateService,
+                     protected route: ActivatedRoute,
+                     protected router: Router,
+                     @Inject(GLOBAL_CONFIG) protected EnvConfig: GlobalConfig,
+                     protected collectionService: CollectionDataService,
+                     protected requestService: RequestService) {
+    super(objectUpdatesService, notificationsService, translate);
+  }
+
+  /**
+   * Initialize properties to setup the Field Update and Form
+   */
+  ngOnInit(): void {
+    this.notificationsPrefix = 'collection.edit.tabs.source.notifications.';
+    this.discardTimeOut = this.EnvConfig.collection.edit.undoTimeout;
+    this.url = this.router.url;
+    if (this.url.indexOf('?') > 0) {
+      this.url = this.url.substr(0, this.url.indexOf('?'));
+    }
+    this.formGroup = this.formService.createFormGroup(this.formModel);
+    this.collectionRD$ = this.route.parent.data.pipe(first(), map((data) => data.dso));
+
+    this.collectionRD$.pipe(
+      getSucceededRemoteData(),
+      map((col) => col.payload.uuid),
+      switchMap((uuid) => this.collectionService.getContentSource(uuid)),
+      take(1)
+    ).subscribe((contentSource: ContentSource) => {
+      this.initializeOriginalContentSource(contentSource);
+    });
+
+    this.updateFieldTranslations();
+    this.translate.onLangChange
+      .subscribe(() => {
+        this.updateFieldTranslations();
+      });
+  }
+
+  /**
+   * Initialize the Field Update and subscribe on it to fire updates to the form whenever it changes
+   */
+  initializeOriginalContentSource(contentSource: ContentSource) {
+    this.contentSource = contentSource;
+    this.initialHarvestType = contentSource.harvestType;
+    this.initializeMetadataConfigs();
+    const initialContentSource = cloneDeep(this.contentSource);
+    this.objectUpdatesService.initialize(this.url, [initialContentSource], new Date());
+    this.update$ = this.objectUpdatesService.getFieldUpdates(this.url, [initialContentSource]).pipe(
+      map((updates: FieldUpdates) => updates[initialContentSource.uuid])
+    );
+    this.updateSub = this.update$.subscribe((update: FieldUpdate) => {
+      if (update) {
+        const field = update.field as ContentSource;
+        let configId;
+        if (hasValue(this.contentSource) && isNotEmpty(this.contentSource.metadataConfigs)) {
+          configId = this.contentSource.metadataConfigs[0].id;
+        }
+        if (hasValue(field) && hasValue(field.metadataConfigId)) {
+          configId = field.metadataConfigId;
+        }
+        if (hasValue(field)) {
+          this.formGroup.patchValue({
+            oaiSourceContainer: {
+              oaiSource: field.oaiSource
+            },
+            oaiSetContainer: {
+              oaiSetId: field.oaiSetId,
+              metadataConfigId: configId
+            },
+            harvestTypeContainer: {
+              harvestType: field.harvestType
+            }
+          });
+          this.contentSource = cloneDeep(field);
+        }
+        this.contentSource.metadataConfigId = configId;
+      }
+    });
+  }
+
+  /**
+   * Fill the metadataConfigIdModel's options using the contentSource's metadataConfigs property
+   */
+  initializeMetadataConfigs() {
+    this.metadataConfigIdModel.options = this.contentSource.metadataConfigs
+      .map((metadataConfig: MetadataConfig) => Object.assign({ value: metadataConfig.id, label: metadataConfig.label }));
+    if (this.metadataConfigIdModel.options.length > 0) {
+      this.formGroup.patchValue({
+        oaiSetContainer: {
+          metadataConfigId: this.metadataConfigIdModel.options[0].value
+        }
+      });
+    }
+  }
+
+  /**
+   * Used the update translations of errors and labels on init and on language change
+   */
+  private updateFieldTranslations() {
+    this.inputModels.forEach(
+      (fieldModel: DynamicFormControlModel) => {
+        this.updateFieldTranslation(fieldModel);
+      }
+    );
+  }
+
+  /**
+   * Update the translations of a DynamicInputModel
+   * @param fieldModel
+   */
+  private updateFieldTranslation(fieldModel: DynamicFormControlModel) {
+    fieldModel.label = this.translate.instant(this.LABEL_KEY_PREFIX + fieldModel.id);
+    if (isNotEmpty(fieldModel.validators)) {
+      fieldModel.errorMessages = {};
+      Object.keys(fieldModel.validators).forEach((key) => {
+        fieldModel.errorMessages[key] = this.translate.instant(this.ERROR_KEY_PREFIX + fieldModel.id + '.' + key);
+      });
+    }
+    if (fieldModel instanceof DynamicOptionControlModel) {
+      if (isNotEmpty(fieldModel.options)) {
+        fieldModel.options.forEach((option) => {
+          if (hasNoValue(option.label)) {
+            option.label = this.translate.instant(this.OPTIONS_KEY_PREFIX + fieldModel.id + '.' + option.value);
+          }
+        });
+      }
+    }
+  }
+
+  /**
+   * Fired whenever the form receives an update and makes sure the Content Source and field update is up-to-date with the changes
+   * @param event
+   */
+  onChange(event) {
+    this.updateContentSourceField(event.model, true);
+    this.saveFieldUpdate();
+  }
+
+  /**
+   * Submit the edited Content Source to the REST API, re-initialize the field update and display a notification
+   */
+  onSubmit() {
+    // Remove cached harvester request to allow for latest harvester to be displayed when switching tabs
+    this.collectionRD$.pipe(
+      getSucceededRemoteData(),
+      map((col) => col.payload.uuid),
+      switchMap((uuid) => this.collectionService.getHarvesterEndpoint(uuid)),
+      take(1)
+    ).subscribe((endpoint) => this.requestService.removeByHrefSubstring(endpoint));
+
+    // Update harvester
+    this.collectionRD$.pipe(
+      getSucceededRemoteData(),
+      map((col) => col.payload.uuid),
+      switchMap((uuid) => this.collectionService.updateContentSource(uuid, this.contentSource)),
+      take(1)
+    ).subscribe((result: ContentSource | INotification) => {
+      if (hasValue((result as any).harvestType)) {
+        this.clearNotifications();
+        this.initializeOriginalContentSource(result as ContentSource);
+        this.displayedNotifications.push(this.notificationsService.success(this.getNotificationTitle('saved'), this.getNotificationContent('saved')));
+      } else {
+        this.displayedNotifications.push(result as INotification);
+      }
+    });
+  }
+
+  /**
+   * Cancel the edit and return to the previous page
+   */
+  onCancel() {
+    this.location.back();
+  }
+
+  /**
+   * Is the current form valid to be submitted ?
+   */
+  isValid(): boolean {
+    return (this.contentSource.harvestType === ContentSourceHarvestType.None) || this.formGroup.valid;
+  }
+
+  /**
+   * Switch the external source on or off and fire a field update
+   */
+  changeExternalSource() {
+    if (this.contentSource.harvestType === ContentSourceHarvestType.None) {
+      this.contentSource.harvestType = this.previouslySelectedHarvestType;
+    } else {
+      this.previouslySelectedHarvestType = this.contentSource.harvestType;
+      this.contentSource.harvestType = ContentSourceHarvestType.None;
+    }
+    this.updateContentSource(false);
+  }
+
+  /**
+   * Loop over all inputs and update the Content Source with their value
+   * @param updateHarvestType   When set to false, the harvestType of the contentSource will be ignored in the update
+   */
+  updateContentSource(updateHarvestType: boolean) {
+    this.inputModels.forEach(
+      (fieldModel: DynamicInputModel) => {
+        this.updateContentSourceField(fieldModel, updateHarvestType)
+      }
+    );
+    this.saveFieldUpdate();
+  }
+
+  /**
+   * Update the Content Source with the value from a DynamicInputModel
+   * @param fieldModel          The fieldModel to fetch the value from and update the contentSource with
+   * @param updateHarvestType   When set to false, the harvestType of the contentSource will be ignored in the update
+   */
+  updateContentSourceField(fieldModel: DynamicInputModel, updateHarvestType: boolean) {
+    if (hasValue(fieldModel.value) && !(fieldModel.id === this.harvestTypeModel.id && !updateHarvestType)) {
+      this.contentSource[fieldModel.id] = fieldModel.value;
+    }
+  }
+
+  /**
+   * Save the current Content Source to the Object Updates cache
+   */
+  saveFieldUpdate() {
+    this.objectUpdatesService.saveAddFieldUpdate(this.url, cloneDeep(this.contentSource));
+  }
+
+  /**
+   * Clear possible active notifications
+   */
+  clearNotifications() {
+    this.displayedNotifications.forEach((notification: INotification) => {
+      this.notificationsService.remove(notification);
+    });
+    this.displayedNotifications = [];
+  }
+
+  /**
+   * Make sure open subscriptions are closed
+   */
+  ngOnDestroy(): void {
+    if (this.updateSub) {
+      this.updateSub.unsubscribe();
+    }
+  }
 }

src/app/+item-page/edit-item-page/edit-item-page.module.ts

@@ -21,6 +21,7 @@ import { ItemRelationshipsComponent } from './item-relationships/item-relationsh
 import { EditRelationshipComponent } from './item-relationships/edit-relationship/edit-relationship.component';
 import { EditRelationshipListComponent } from './item-relationships/edit-relationship-list/edit-relationship-list.component';
 import { ItemMoveComponent } from './item-move/item-move.component';
+import { VirtualMetadataComponent } from './virtual-metadata/virtual-metadata.component';
 
 /**
  * Module that contains all components related to the Edit Item page administrator functionality
@@ -51,6 +52,7 @@ import { ItemMoveComponent } from './item-move/item-move.component';
     EditRelationshipListComponent,
     ItemCollectionMapperComponent,
     ItemMoveComponent,
+    VirtualMetadataComponent,
   ]
 })
 export class EditItemPageModule {

src/app/+item-page/edit-item-page/item-delete/item-delete.component.html

@@ -0,0 +1,98 @@
+<div class="container">
+    <div class="row">
+        <div class="col-12">
+
+            <h2>{{headerMessage | translate: {id: item.handle} }}</h2>
+            <p>{{descriptionMessage | translate}}</p>
+            <ds-modify-item-overview [item]="item"></ds-modify-item-overview>
+
+            <ng-container *ngVar="(types$ | async) as types">
+
+                <div *ngIf="types && types.length > 0" class="mb-4">
+
+                    {{'virtual-metadata.delete-item.info' | translate}}
+
+                    <div *ngFor="let type of types" class="mb-4">
+
+                        <div *ngVar="(isSelected(type) | async) as selected"
+                             class="d-flex flex-row">
+
+                            <div class="m-2" (click)="setSelected(type, !selected)">
+                                <label>
+                                    <input type="checkbox" [checked]="selected">
+                                </label>
+                            </div>
+
+                            <div class="flex-column flex-grow-1">
+                                <h5 (click)="setSelected(type, !selected)">
+                                    {{getRelationshipMessageKey(getLabel(type) | async) | translate}}
+                                </h5>
+                                <div *ngFor="let relationship of (getRelationships(type) | async)"
+                                     class="d-flex flex-row">
+                                    <ng-container *ngVar="(getRelatedItem(relationship) | async) as relatedItem">
+
+                                        <ds-listable-object-component-loader
+                                                *ngIf="relatedItem"
+                                                [object]="relatedItem"
+                                                [viewMode]="viewMode">
+                                        </ds-listable-object-component-loader>
+                                        <div class="ml-auto">
+                                            <div class="btn-group">
+                                                <button class="btn btn-outline-info btn-sm"
+                                                        (click)="openVirtualMetadataModal(virtualMetadataModal)">
+                                                    <i class="fas fa-info fa-fw"></i>
+                                                </button>
+                                            </div>
+                                        </div>
+
+                                        <ng-template #virtualMetadataModal>
+                                            <div>
+                                                <div class="modal-header">
+                                                    {{'virtual-metadata.delete-item.modal-head' | translate}}
+                                                    <button type="button" class="close"
+                                                            (click)="closeVirtualMetadataModal()" aria-label="Close">
+                                                        <span aria-hidden="true">×</span>
+                                                    </button>
+                                                </div>
+                                                <div class="modal-body">
+                                                    <ds-listable-object-component-loader
+                                                            *ngIf="relatedItem"
+                                                            [object]="relatedItem"
+                                                            [viewMode]="viewMode">
+                                                    </ds-listable-object-component-loader>
+                                                    <div *ngFor="let metadata of (getVirtualMetadata(relationship) | async)">
+                                                        <div>
+                                                            <div class="font-weight-bold">
+                                                                {{metadata.metadataField}}
+                                                            </div>
+                                                            <div>
+                                                                {{metadata.metadataValue.value}}
+                                                            </div>
+                                                        </div>
+                                                    </div>
+                                                </div>
+                                            </div>
+                                        </ng-template>
+
+                                    </ng-container>
+                                </div>
+                            </div>
+
+                        </div>
+
+                    </div>
+
+                </div>
+
+            </ng-container>
+
+            <button (click)="performAction()"
+                    class="btn btn-outline-secondary perform-action">{{confirmMessage | translate}}
+            </button>
+            <button [routerLink]="['/items/', item.id, 'edit']" class="btn btn-outline-secondary cancel">
+                {{cancelMessage| translate}}
+            </button>
+
+        </div>
+    </div>
+</div>

src/app/+item-page/edit-item-page/item-delete/item-delete.component.spec.ts

@@ -1,44 +1,132 @@
-import { async, ComponentFixture, TestBed } from '@angular/core/testing';
-import { Item } from '../../../core/shared/item.model';
-import { RouterStub } from '../../../shared/testing/router-stub';
-import { of as observableOf } from 'rxjs';
-import { RemoteData } from '../../../core/data/remote-data';
-import { NotificationsServiceStub } from '../../../shared/testing/notifications-service-stub';
-import { CommonModule } from '@angular/common';
-import { FormsModule } from '@angular/forms';
-import { RouterTestingModule } from '@angular/router/testing';
-import { TranslateModule } from '@ngx-translate/core';
-import { NgbModule } from '@ng-bootstrap/ng-bootstrap';
-import { ActivatedRoute, Router } from '@angular/router';
-import { ItemDataService } from '../../../core/data/item-data.service';
-import { NotificationsService } from '../../../shared/notifications/notifications.service';
-import { CUSTOM_ELEMENTS_SCHEMA } from '@angular/core';
-import { By } from '@angular/platform-browser';
-import { ItemDeleteComponent } from './item-delete.component';
-import { getItemEditPath } from '../../item-page-routing.module';
-import { RestResponse } from '../../../core/cache/response.models';
-import { createSuccessfulRemoteDataObject } from '../../../shared/testing/utils';
+import {async, ComponentFixture, TestBed} from '@angular/core/testing';
+import { ItemType } from '../../../core/shared/item-relationships/item-type.model';
+import { Relationship } from '../../../core/shared/item-relationships/relationship.model';
+import {Item} from '../../../core/shared/item.model';
+import {RouterStub} from '../../../shared/testing/router-stub';
+import {of as observableOf} from 'rxjs';
+import {NotificationsServiceStub} from '../../../shared/testing/notifications-service-stub';
+import {CommonModule} from '@angular/common';
+import {FormsModule} from '@angular/forms';
+import {RouterTestingModule} from '@angular/router/testing';
+import {TranslateModule} from '@ngx-translate/core';
+import {NgbModule} from '@ng-bootstrap/ng-bootstrap';
+import {ActivatedRoute, Router} from '@angular/router';
+import {ItemDataService} from '../../../core/data/item-data.service';
+import {NotificationsService} from '../../../shared/notifications/notifications.service';
+import {CUSTOM_ELEMENTS_SCHEMA} from '@angular/core';
+import {By} from '@angular/platform-browser';
+import {ItemDeleteComponent} from './item-delete.component';
+import {getItemEditPath} from '../../item-page-routing.module';
+import {createSuccessfulRemoteDataObject} from '../../../shared/testing/utils';
+import {VarDirective} from '../../../shared/utils/var.directive';
+import {ObjectUpdatesService} from '../../../core/data/object-updates/object-updates.service';
+import {RelationshipService} from '../../../core/data/relationship.service';
+import {RelationshipType} from '../../../core/shared/item-relationships/relationship-type.model';
+import {RemoteData} from '../../../core/data/remote-data';
+import {PaginatedList} from '../../../core/data/paginated-list';
+import {PageInfo} from '../../../core/shared/page-info.model';
+import {EntityTypeService} from '../../../core/data/entity-type.service';
 
 let comp: ItemDeleteComponent;
 let fixture: ComponentFixture<ItemDeleteComponent>;
 
 let mockItem;
+let itemType;
+let type1;
+let type2;
+let types;
+let relationships;
 let itemPageUrl;
 let routerStub;
 let mockItemDataService: ItemDataService;
 let routeStub;
+let objectUpdatesServiceStub;
+let relationshipService;
+let entityTypeService;
 let notificationsServiceStub;
+let typesSelection;
 
 describe('ItemDeleteComponent', () => {
   beforeEach(async(() => {
 
     mockItem = Object.assign(new Item(), {
       id: 'fake-id',
+      uuid: 'fake-uuid',
       handle: 'fake/handle',
       lastModified: '2018',
       isWithdrawn: true
     });
 
+    itemType = Object.assign(new ItemType(), {
+      id: 'itemType',
+      uuid: 'itemType',
+    });
+
+    type1 = Object.assign(new RelationshipType(), {
+      id: '1',
+      uuid: 'type-1',
+    });
+
+    type2 = Object.assign(new RelationshipType(), {
+      id: '2',
+      uuid: 'type-2',
+    });
+
+    types = [type1, type2];
+
+    relationships = [
+      Object.assign(new Relationship(), {
+        id: '1',
+        uuid: 'relationship-1',
+        relationshipType: observableOf(new RemoteData(
+          false,
+          false,
+          true,
+          null,
+          type1
+        )),
+        leftItem:  observableOf(new RemoteData(
+          false,
+          false,
+          true,
+          null,
+          mockItem,
+        )),
+        rightItem:  observableOf(new RemoteData(
+          false,
+          false,
+          true,
+          null,
+          Object.assign(new Item(), {})
+        )),
+      }),
+      Object.assign(new Relationship(), {
+        id: '2',
+        uuid: 'relationship-2',
+        relationshipType: observableOf(new RemoteData(
+          false,
+          false,
+          true,
+          null,
+          type2
+        )),
+        leftItem:  observableOf(new RemoteData(
+          false,
+          false,
+          true,
+          null,
+          mockItem,
+        )),
+        rightItem:  observableOf(new RemoteData(
+          false,
+          false,
+          true,
+          null,
+          Object.assign(new Item(), {})
+        )),
+      }),
+    ];
+
     itemPageUrl = `fake-url/${mockItem.id}`;
     routerStub = Object.assign(new RouterStub(), {
       url: `${itemPageUrl}/edit`
@@ -54,16 +142,56 @@ describe('ItemDeleteComponent', () => {
       })
     };
 
+    typesSelection = {
+      type1: false,
+      type2: true,
+    };
+
+    entityTypeService = jasmine.createSpyObj('entityTypeService',
+      {
+        getEntityTypeByLabel: observableOf(new RemoteData(
+          false,
+          false,
+          true,
+          null,
+          itemType,
+        )),
+        getEntityTypeRelationships: observableOf(new RemoteData(
+          false,
+          false,
+          true,
+          null,
+          new PaginatedList(new PageInfo(), types),
+        )),
+      }
+    );
+
+    objectUpdatesServiceStub = {
+      initialize: () => {
+        // do nothing
+      },
+      isSelectedVirtualMetadata: (type) => observableOf(typesSelection[type]),
+    };
+
+    relationshipService = jasmine.createSpyObj('relationshipService',
+      {
+        getItemRelationshipsArray: observableOf(relationships),
+      }
+    );
+
     notificationsServiceStub = new NotificationsServiceStub();
 
     TestBed.configureTestingModule({
       imports: [CommonModule, FormsModule, RouterTestingModule.withRoutes([]), TranslateModule.forRoot(), NgbModule.forRoot()],
-      declarations: [ItemDeleteComponent],
+      declarations: [ItemDeleteComponent, VarDirective],
       providers: [
         { provide: ActivatedRoute, useValue: routeStub },
         { provide: Router, useValue: routerStub },
         { provide: ItemDataService, useValue: mockItemDataService },
         { provide: NotificationsService, useValue: notificationsServiceStub },
+        { provide: ObjectUpdatesService, useValue: objectUpdatesServiceStub },
+        { provide: RelationshipService, useValue: relationshipService },
+        { provide: EntityTypeService, useValue: entityTypeService },
       ], schemas: [
         CUSTOM_ELEMENTS_SCHEMA
       ]
@@ -91,7 +219,8 @@ describe('ItemDeleteComponent', () => {
     it('should call delete function from the ItemDataService', () => {
       spyOn(comp, 'notify');
       comp.performAction();
-      expect(mockItemDataService.delete).toHaveBeenCalledWith(mockItem);
+      expect(mockItemDataService.delete)
+        .toHaveBeenCalledWith(mockItem, types.filter((type) => typesSelection[type]).map((type) => type.id));
       expect(comp.notify).toHaveBeenCalled();
     });
   });

src/app/+item-page/edit-item-page/item-delete/item-delete.component.ts

@@ -1,29 +1,323 @@
-import { Component } from '@angular/core';
-import { first } from 'rxjs/operators';
-import { AbstractSimpleItemActionComponent } from '../simple-item-action/abstract-simple-item-action.component';
-import { getItemEditPath } from '../../item-page-routing.module';
-import { RestResponse } from '../../../core/cache/response.models';
+import {Component, Input, OnInit} from '@angular/core';
+import {filter, first, map, switchMap, take} from 'rxjs/operators';
+import {AbstractSimpleItemActionComponent} from '../simple-item-action/abstract-simple-item-action.component';
+import {getItemEditPath} from '../../item-page-routing.module';
+import {NgbModal, NgbModalRef} from '@ng-bootstrap/ng-bootstrap';
+import {combineLatest as observableCombineLatest, combineLatest, Observable} from 'rxjs';
+import {RelationshipType} from '../../../core/shared/item-relationships/relationship-type.model';
+import {VirtualMetadata} from '../virtual-metadata/virtual-metadata.component';
+import {Relationship} from '../../../core/shared/item-relationships/relationship.model';
+import {getRemoteDataPayload, getSucceededRemoteData} from '../../../core/shared/operators';
+import {hasValue, isNotEmpty} from '../../../shared/empty.util';
+import {Item} from '../../../core/shared/item.model';
+import {MetadataValue} from '../../../core/shared/metadata.models';
+import {ViewMode} from '../../../core/shared/view-mode.model';
+import {ActivatedRoute, Router} from '@angular/router';
+import {NotificationsService} from '../../../shared/notifications/notifications.service';
+import {ItemDataService} from '../../../core/data/item-data.service';
+import {TranslateService} from '@ngx-translate/core';
+import {ObjectUpdatesService} from '../../../core/data/object-updates/object-updates.service';
+import {RelationshipService} from '../../../core/data/relationship.service';
+import {EntityTypeService} from '../../../core/data/entity-type.service';
 
 @Component({
   selector: 'ds-item-delete',
-  templateUrl: '../simple-item-action/abstract-simple-item-action.component.html'
+  templateUrl: '../item-delete/item-delete.component.html'
 })
 /**
  * Component responsible for rendering the item delete page
  */
-export class ItemDeleteComponent extends AbstractSimpleItemActionComponent {
+export class ItemDeleteComponent
+  extends AbstractSimpleItemActionComponent
+  implements OnInit {
+
+  /**
+   * The current url of this page
+   */
+  @Input() url: string;
 
   protected messageKey = 'delete';
 
   /**
-   * Perform the delete action to the item
+   * The view-mode we're currently on
+   */
+  viewMode = ViewMode.ListElement;
+
+  /**
+   * A list of the relationship types for which this item has relations as an observable.
+   * The list doesn't contain duplicates.
+   */
+  types$: Observable<RelationshipType[]>;
+
+  /**
+   * A map which stores the relationships of this item for each type as observable lists
+   */
+  relationships$: Map<RelationshipType, Observable<Relationship[]>>
+    = new Map<RelationshipType, Observable<Relationship[]>>();
+
+  /**
+   * A map which stores the related item of each relationship of this item as an observable
+   */
+  relatedItems$: Map<Relationship, Observable<Item>> = new Map<Relationship, Observable<Item>>();
+
+  /**
+   * A map which stores the virtual metadata (of the related) item corresponding to each relationship of this item
+   * as an observable list
+   */
+  virtualMetadata$: Map<Relationship, Observable<VirtualMetadata[]>> = new Map<Relationship, Observable<VirtualMetadata[]>>();
+
+  /**
+   * Reference to NgbModal
+   */
+  public modalRef: NgbModalRef;
+
+  constructor(protected route: ActivatedRoute,
+              protected router: Router,
+              protected notificationsService: NotificationsService,
+              protected itemDataService: ItemDataService,
+              protected translateService: TranslateService,
+              protected modalService: NgbModal,
+              protected objectUpdatesService: ObjectUpdatesService,
+              protected relationshipService: RelationshipService,
+              protected entityTypeService: EntityTypeService,
+  ) {
+    super(
+      route,
+      router,
+      notificationsService,
+      itemDataService,
+      translateService,
+    );
+  }
+
+  /**
+   * Set up and initialize all fields
+   */
+  ngOnInit() {
+
+    super.ngOnInit();
+    this.url = this.router.url;
+
+    this.types$ = this.entityTypeService.getEntityTypeByLabel(
+      this.item.firstMetadataValue('relationship.type')
+    ).pipe(
+      getSucceededRemoteData(),
+      getRemoteDataPayload(),
+      switchMap((entityType) => this.entityTypeService.getEntityTypeRelationships(entityType.id)),
+      getSucceededRemoteData(),
+      getRemoteDataPayload(),
+      map((relationshipTypes) => relationshipTypes.page),
+      switchMap((types) =>
+        combineLatest(types.map((type) => this.getRelationships(type))).pipe(
+          map((relationships) =>
+            types.reduce<RelationshipType[]>((includedTypes, type, index) => {
+              if (!includedTypes.some((includedType) => includedType.id === type.id)
+                && !(relationships[index].length === 0)) {
+                return [...includedTypes, type];
+              } else {
+                return includedTypes;
+              }
+            }, [])
+          ),
+        )
+      ),
+    );
+
+    this.types$.pipe(
+      take(1),
+    ).subscribe((types) =>
+      this.objectUpdatesService.initialize(this.url, types, this.item.lastModified)
+    );
+  }
+
+  /**
+   * Open the modal which lists the virtual metadata of a relation
+   * @param content the html content of the modal
+   */
+  openVirtualMetadataModal(content: any) {
+    this.modalRef = this.modalService.open(content);
+  }
+
+  /**
+   * Close the modal which lists the virtual metadata of a relation
+   */
+  closeVirtualMetadataModal() {
+    this.modalRef.close();
+  }
+
+  /**
+   * Get the i18n message key for a relationship
+   * @param label   The relationship type's label
+   */
+  getRelationshipMessageKey(label: string): string {
+    if (hasValue(label) && label.indexOf('Of') > -1) {
+      return `relationships.${label.substring(0, label.indexOf('Of') + 2)}`
+    } else {
+      return label;
+    }
+  }
+
+  /**
+   * Get the relationship type label relevant for this item as an observable
+   * @param relationshipType  the relationship type to get the label for
+   */
+  getLabel(relationshipType: RelationshipType): Observable<string> {
+
+    return this.getRelationships(relationshipType).pipe(
+      switchMap((relationships) =>
+        this.isLeftItem(relationships[0]).pipe(
+          map((isLeftItem) => isLeftItem ? relationshipType.leftwardType : relationshipType.rightwardType),
+        )
+      ),
+    )
+  }
+
+  /**
+   * Get the relationships of this item with a given type as an observable
+   * @param relationshipType  the relationship type to filter the item's relationships on
+   */
+  getRelationships(relationshipType: RelationshipType): Observable<Relationship[]> {
+
+    if (!this.relationships$.has(relationshipType)) {
+      this.relationships$.set(
+        relationshipType,
+        this.relationshipService.getItemRelationshipsArray(this.item).pipe(
+          // filter on type
+          switchMap((relationships) =>
+            observableCombineLatest(
+              relationships.map((relationship) => this.getRelationshipType(relationship))
+            ).pipe(
+              map((types) => relationships.filter(
+                (relationship, index) => relationshipType.id === types[index].id
+              )),
+            )
+          ),
+        )
+      );
+    }
+
+    return this.relationships$.get(relationshipType);
+  }
+
+  /**
+   * Get the type of a given relationship as an observable
+   * @param relationship  the relationship to get the type for
+   */
+  private getRelationshipType(relationship: Relationship): Observable<RelationshipType> {
+
+    return relationship.relationshipType.pipe(
+      getSucceededRemoteData(),
+      getRemoteDataPayload(),
+      filter((relationshipType: RelationshipType) => hasValue(relationshipType) && isNotEmpty(relationshipType.uuid))
+    );
+  }
+
+  /**
+   * Get the item this item is related to through a given relationship as an observable
+   * @param relationship  the relationship to get the other item for
+   */
+  getRelatedItem(relationship: Relationship): Observable<Item> {
+
+    if (!this.relatedItems$.has(relationship)) {
+
+      this.relatedItems$.set(
+        relationship,
+        this.isLeftItem(relationship).pipe(
+          switchMap((isLeftItem) => isLeftItem ? relationship.rightItem : relationship.leftItem),
+          getSucceededRemoteData(),
+          getRemoteDataPayload(),
+        ),
+      );
+    }
+
+    return this.relatedItems$.get(relationship);
+  }
+
+  /**
+   * Get the virtual metadata for a given relationship of the related item.
+   * @param relationship  the relationship to get the virtual metadata for
+   */
+  getVirtualMetadata(relationship: Relationship): Observable<VirtualMetadata[]> {
+
+    if (!this.virtualMetadata$.has(relationship)) {
+
+      this.virtualMetadata$.set(
+        relationship,
+        this.getRelatedItem(relationship).pipe(
+          map((relatedItem) =>
+            Object.entries(relatedItem.metadata)
+              .map(([key, value]) => value
+                .filter((metadata: MetadataValue) =>
+                  metadata.authority && metadata.authority.endsWith(relationship.id))
+                .map((metadata: MetadataValue) => {
+                  return {
+                    metadataField: key,
+                    metadataValue: metadata,
+                  }
+                }))
+              .reduce((previous, current) => previous.concat(current))
+          ),
+        )
+      );
+    }
+
+    return this.virtualMetadata$.get(relationship);
+  }
+
+  /**
+   * Check whether this item is the left item of a given relationship, as an observable boolean
+   * @param relationship  the relationship for which to check whether this item is the left item
+   */
+  private isLeftItem(relationship: Relationship): Observable<boolean> {
+
+    return relationship.leftItem.pipe(
+      getSucceededRemoteData(),
+      getRemoteDataPayload(),
+      filter((item: Item) => hasValue(item) && isNotEmpty(item.uuid)),
+      map((leftItem) => leftItem.uuid === this.item.uuid)
+    );
+  }
+
+  /**
+   * Check whether a given relationship type is selected to save the corresponding virtual metadata
+   * @param type  the relationship type for which to check whether it is selected
+   */
+  isSelected(type: RelationshipType): Observable<boolean> {
+    return this.objectUpdatesService.isSelectedVirtualMetadata(this.url, this.item.uuid, type.uuid);
+  }
+
+  /**
+   * Select/deselect a given relationship type to save the corresponding virtual metadata
+   * @param type      the relationship type to select/deselect
+   * @param selected  whether the type should be selected
+   */
+  setSelected(type: RelationshipType, selected: boolean): void {
+    this.objectUpdatesService.setSelectedVirtualMetadata(this.url, this.item.uuid, type.uuid, selected);
+  }
+
+  /**
+   * Perform the delete operation
    */
   performAction() {
-    this.itemDataService.delete(this.item).pipe(first()).subscribe(
+
+    this.types$.pipe(
+      switchMap((types) =>
+        combineLatest(
+          types.map((type) => this.isSelected(type))
+        ).pipe(
+          map((selection) => types.filter(
+            (type, index) => selection[index]
+          )),
+          map((selectedTypes) => selectedTypes.map((type) => type.id)),
+        )
+      ),
+    ).subscribe((types) => {
+      this.itemDataService.delete(this.item, types).pipe(first()).subscribe(
         (succeeded: boolean) => {
           this.notify(succeeded);
         }
       );
+    });
   }
 
   /**

src/app/+item-page/edit-item-page/item-relationships/edit-relationship-list/edit-relationship-list.component.html

@@ -1,15 +1,15 @@
-<ng-container *ngVar="(updates$ | async) as updates">
-  <div *ngIf="updates">
-    <h5>{{getRelationshipMessageKey(relationshipLabel) | translate}}</h5>
-    <ng-container *ngVar="(updates | dsObjectValues) as updateValues">
-      <div *ngFor="let updateValue of updateValues; trackBy: trackUpdate"
-           ds-edit-relationship
+<h5>{{getRelationshipMessageKey() | async | translate}}</h5>
+<ng-container *ngVar="updates$ | async as updates">
+    <ng-container *ngIf="updates">
+        <ng-container *ngVar="updates | dsObjectValues as updateValues">
+            <ds-edit-relationship *ngFor="let updateValue of updateValues; trackBy: trackUpdate"
                                   class="relationship-row d-block"
-           [fieldUpdate]="updateValue || {}"
+                                  [fieldUpdate]="updateValue"
                                   [url]="url"
-           [ngClass]="{'alert alert-danger': updateValue.changeType === 2}">
-      </div>
-      <ds-loading *ngIf="updateValues.length == 0" message="{{'loading.items' | translate}}"></ds-loading>
+                                  [editItem]="item"
+                                  [ngClass]="{'alert alert-danger': updateValue?.changeType === 2}">
+            </ds-edit-relationship>
         </ng-container>
-  </div>
+    </ng-container>
+    <div *ngIf="!updates">no relationships</div>
 </ng-container>

src/app/+item-page/edit-item-page/item-relationships/edit-relationship-list/edit-relationship-list.component.spec.ts

@@ -1,27 +1,26 @@
-import { EditRelationshipListComponent } from './edit-relationship-list.component';
-import { async, ComponentFixture, TestBed } from '@angular/core/testing';
-import { RelationshipType } from '../../../../core/shared/item-relationships/relationship-type.model';
-import { ResourceType } from '../../../../core/shared/resource-type';
-import { Relationship } from '../../../../core/shared/item-relationships/relationship.model';
-import { of as observableOf } from 'rxjs/internal/observable/of';
-import { RemoteData } from '../../../../core/data/remote-data';
-import { Item } from '../../../../core/shared/item.model';
-import { PaginatedList } from '../../../../core/data/paginated-list';
-import { PageInfo } from '../../../../core/shared/page-info.model';
-import { FieldChangeType } from '../../../../core/data/object-updates/object-updates.actions';
-import { SharedModule } from '../../../../shared/shared.module';
-import { TranslateModule } from '@ngx-translate/core';
-import { ObjectUpdatesService } from '../../../../core/data/object-updates/object-updates.service';
-import { RelationshipService } from '../../../../core/data/relationship.service';
-import { DebugElement, NO_ERRORS_SCHEMA } from '@angular/core';
-import { By } from '@angular/platform-browser';
+import {EditRelationshipListComponent} from './edit-relationship-list.component';
+import {async, ComponentFixture, TestBed} from '@angular/core/testing';
+import {RelationshipType} from '../../../../core/shared/item-relationships/relationship-type.model';
+import {Relationship} from '../../../../core/shared/item-relationships/relationship.model';
+import {of as observableOf} from 'rxjs/internal/observable/of';
+import {RemoteData} from '../../../../core/data/remote-data';
+import {Item} from '../../../../core/shared/item.model';
+import {PaginatedList} from '../../../../core/data/paginated-list';
+import {PageInfo} from '../../../../core/shared/page-info.model';
+import {FieldChangeType} from '../../../../core/data/object-updates/object-updates.actions';
+import {SharedModule} from '../../../../shared/shared.module';
+import {TranslateModule} from '@ngx-translate/core';
+import {ObjectUpdatesService} from '../../../../core/data/object-updates/object-updates.service';
+import {DebugElement, NO_ERRORS_SCHEMA} from '@angular/core';
+import {By} from '@angular/platform-browser';
+import {ItemType} from '../../../../core/shared/item-relationships/item-type.model';
 
 let comp: EditRelationshipListComponent;
 let fixture: ComponentFixture<EditRelationshipListComponent>;
 let de: DebugElement;
 
 let objectUpdatesService;
-let relationshipService;
+let entityTypeService;
 
 const url = 'http://test-url.com/test-url';
 
@@ -30,42 +29,66 @@ let author1;
 let author2;
 let fieldUpdate1;
 let fieldUpdate2;
-let relationships;
+let relationship1;
+let relationship2;
 let relationshipType;
+let entityType;
+let relatedEntityType;
 
 describe('EditRelationshipListComponent', () => {
-  beforeEach(async(() => {
+
+  beforeEach(() => {
+
+    entityType = Object.assign(new ItemType(), {
+      id: 'entityType',
+    });
+
+    relatedEntityType = Object.assign(new ItemType(), {
+      id: 'relatedEntityType',
+    });
+
     relationshipType = Object.assign(new RelationshipType(), {
       id: '1',
       uuid: '1',
       leftwardType: 'isAuthorOfPublication',
-      rightwardType: 'isPublicationOfAuthor'
+      rightwardType: 'isPublicationOfAuthor',
+      leftType: observableOf(new RemoteData(false, false, true, undefined, entityType)),
+      rightType: observableOf(new RemoteData(false, false, true, undefined, relatedEntityType)),
     });
 
-    relationships = [
-      Object.assign(new Relationship(), {
+    relationship1 = Object.assign(new Relationship(), {
       self: url + '/2',
       id: '2',
       uuid: '2',
       leftId: 'author1',
       rightId: 'publication',
+      leftItem: observableOf(new RemoteData(false, false, true, undefined, item)),
+      rightItem: observableOf(new RemoteData(false, false, true, undefined, author1)),
       relationshipType: observableOf(new RemoteData(false, false, true, undefined, relationshipType))
-      }),
-      Object.assign(new Relationship(), {
+    });
+
+    relationship2 = Object.assign(new Relationship(), {
       self: url + '/3',
       id: '3',
       uuid: '3',
       leftId: 'author2',
       rightId: 'publication',
+      leftItem: observableOf(new RemoteData(false, false, true, undefined, item)),
+      rightItem: observableOf(new RemoteData(false, false, true, undefined, author2)),
       relationshipType: observableOf(new RemoteData(false, false, true, undefined, relationshipType))
-      })
-    ];
+    });
 
     item = Object.assign(new Item(), {
       self: 'fake-item-url/publication',
       id: 'publication',
       uuid: 'publication',
-      relationships: observableOf(new RemoteData(false, false, true, undefined, new PaginatedList(new PageInfo(), relationships)))
+      relationships: observableOf(new RemoteData(
+        false,
+        false,
+        true,
+        undefined,
+        new PaginatedList(new PageInfo(), [relationship1, relationship2])
+      ))
     });
 
     author1 = Object.assign(new Item(), {
@@ -88,16 +111,29 @@ describe('EditRelationshipListComponent', () => {
 
     objectUpdatesService = jasmine.createSpyObj('objectUpdatesService',
       {
-        getFieldUpdatesExclusive: observableOf({
+        getFieldUpdates: observableOf({
           [author1.uuid]: fieldUpdate1,
           [author2.uuid]: fieldUpdate2
         })
       }
     );
 
-    relationshipService = jasmine.createSpyObj('relationshipService',
+    entityTypeService = jasmine.createSpyObj('entityTypeService',
       {
-        getRelatedItemsByLabel: observableOf(new RemoteData(false, false, true, null, new PaginatedList(new PageInfo(), [author1, author2]))),
+        getEntityTypeByLabel: observableOf(new RemoteData(
+          false,
+          false,
+          true,
+          null,
+          entityType,
+        )),
+        getEntityTypeRelationships: observableOf(new RemoteData(
+          false,
+          false,
+          true,
+          null,
+          new PaginatedList(new PageInfo(), [relationshipType]),
+        )),
       }
     );
 
@@ -106,29 +142,27 @@ describe('EditRelationshipListComponent', () => {
       declarations: [EditRelationshipListComponent],
       providers: [
         { provide: ObjectUpdatesService, useValue: objectUpdatesService },
-        { provide: RelationshipService, useValue: relationshipService }
       ], schemas: [
         NO_ERRORS_SCHEMA
       ]
     }).compileComponents();
-  }));
 
-  beforeEach(() => {
     fixture = TestBed.createComponent(EditRelationshipListComponent);
     comp = fixture.componentInstance;
     de = fixture.debugElement;
+
     comp.item = item;
+    comp.itemType = entityType;
     comp.url = url;
-    comp.relationshipLabel = relationshipType.leftwardType;
+    comp.relationshipType = relationshipType;
+
     fixture.detectChanges();
   });
 
   describe('changeType is REMOVE', () => {
-    beforeEach(() => {
-      fieldUpdate1.changeType = FieldChangeType.REMOVE;
-      fixture.detectChanges();
-    });
     it('the div should have class alert-danger', () => {
+
+      fieldUpdate1.changeType = FieldChangeType.REMOVE;
       const element = de.queryAll(By.css('.relationship-row'))[1].nativeElement;
       expect(element.classList).toContain('alert-danger');
     });

src/app/+item-page/edit-item-page/item-relationships/edit-relationship-list/edit-relationship-list.component.ts

@@ -1,13 +1,15 @@
-import { Component, Input, OnChanges, OnInit, SimpleChanges } from '@angular/core';
+import { Component, Input, OnInit } from '@angular/core';
 import { ObjectUpdatesService } from '../../../../core/data/object-updates/object-updates.service';
 import { Observable } from 'rxjs/internal/Observable';
-import { FieldUpdate, FieldUpdates } from '../../../../core/data/object-updates/object-updates.reducer';
-import { RelationshipService } from '../../../../core/data/relationship.service';
-import { Item } from '../../../../core/shared/item.model';
-import { map, switchMap } from 'rxjs/operators';
-import { hasValue } from '../../../../shared/empty.util';
-import { RemoteData } from '../../../../core/data/remote-data';
-import { PaginatedList } from '../../../../core/data/paginated-list';
+import {FieldUpdate, FieldUpdates} from '../../../../core/data/object-updates/object-updates.reducer';
+import {Item} from '../../../../core/shared/item.model';
+import {map, switchMap} from 'rxjs/operators';
+import {hasValue} from '../../../../shared/empty.util';
+import {Relationship} from '../../../../core/shared/item-relationships/relationship.model';
+import {RelationshipType} from '../../../../core/shared/item-relationships/relationship-type.model';
+import {getRemoteDataPayload, getSucceededRemoteData} from '../../../../core/shared/operators';
+import {combineLatest as observableCombineLatest, combineLatest} from 'rxjs';
+import {ItemType} from '../../../../core/shared/item-relationships/item-type.model';
 
 @Component({
   selector: 'ds-edit-relationship-list',
@@ -18,12 +20,15 @@ import { PaginatedList } from '../../../../core/data/paginated-list';
  * A component creating a list of editable relationships of a certain type
  * The relationships are rendered as a list of related items
  */
-export class EditRelationshipListComponent implements OnInit, OnChanges {
+export class EditRelationshipListComponent implements OnInit {
+
   /**
    * The item to display related items for
    */
   @Input() item: Item;
 
+  @Input() itemType: ItemType;
+
   /**
    * The URL to the current page
    * Used to fetch updates for the current item from the store
@@ -33,7 +38,7 @@ export class EditRelationshipListComponent implements OnInit, OnChanges {
   /**
    * The label of the relationship-type we're rendering a list for
    */
-  @Input() relationshipLabel: string;
+  @Input() relationshipType: RelationshipType;
 
   /**
    * The FieldUpdates for the relationships in question
@@ -42,53 +47,42 @@ export class EditRelationshipListComponent implements OnInit, OnChanges {
 
   constructor(
     protected objectUpdatesService: ObjectUpdatesService,
-    protected relationshipService: RelationshipService
   ) {
   }
 
-  ngOnInit(): void {
-    this.initUpdates();
-  }
-
-  ngOnChanges(changes: SimpleChanges): void {
-    this.initUpdates();
-  }
-
   /**
-   * Initialize the FieldUpdates using the related items
+   * Get the i18n message key for this relationship type
    */
-  initUpdates() {
-    this.updates$ = this.getUpdatesByLabel(this.relationshipLabel);
-  }
+  public getRelationshipMessageKey(): Observable<string> {
 
-  /**
-   * Transform the item's relationships of a specific type into related items
-   * @param label   The relationship type's label
-   */
-  public getRelatedItemsByLabel(label: string): Observable<RemoteData<PaginatedList<Item>>> {
-    return this.relationshipService.getRelatedItemsByLabel(this.item, label);
-  }
-
-  /**
-   * Get FieldUpdates for the relationships of a specific type
-   * @param label   The relationship type's label
-   */
-  public getUpdatesByLabel(label: string): Observable<FieldUpdates> {
-    return this.getRelatedItemsByLabel(label).pipe(
-      switchMap((itemsRD) => this.objectUpdatesService.getFieldUpdatesExclusive(this.url, itemsRD.payload.page))
-    )
-  }
-
-  /**
-   * Get the i18n message key for a relationship
-   * @param label   The relationship type's label
-   */
-  public getRelationshipMessageKey(label: string): string {
+    return this.getLabel().pipe(
+      map((label) => {
         if (hasValue(label) && label.indexOf('Of') > -1) {
           return `relationships.${label.substring(0, label.indexOf('Of') + 2)}`
         } else {
           return label;
         }
+      }),
+    );
+  }
+
+  /**
+   * Get the relevant label for this relationship type
+   */
+  private getLabel(): Observable<string> {
+
+    return combineLatest([
+      this.relationshipType.leftType,
+      this.relationshipType.rightType,
+    ].map((itemTypeRD) => itemTypeRD.pipe(
+      getSucceededRemoteData(),
+      getRemoteDataPayload(),
+    ))).pipe(
+      map((itemTypes) => [
+        this.relationshipType.leftwardType,
+        this.relationshipType.rightwardType,
+      ][itemTypes.findIndex((itemType) => itemType.id === this.itemType.id)]),
+    );
   }
 
   /**
@@ -98,4 +92,26 @@ export class EditRelationshipListComponent implements OnInit, OnChanges {
     return update && update.field ? update.field.uuid : undefined;
   }
 
+  ngOnInit(): void {
+    this.updates$ = this.item.relationships.pipe(
+      map((relationships) => relationships.payload.page.filter((relationship) => relationship)),
+      switchMap((itemRelationships) =>
+        observableCombineLatest(
+          itemRelationships
+            .map((relationship) => relationship.relationshipType.pipe(
+              getSucceededRemoteData(),
+              getRemoteDataPayload(),
+            ))
+        ).pipe(
+          map((relationshipTypes) => itemRelationships.filter(
+            (relationship, index) => relationshipTypes[index].id === this.relationshipType.id)
+          ),
+          map((relationships) => relationships.map((relationship) =>
+            Object.assign(new Relationship(), relationship, {uuid: relationship.id})
+          )),
+        )
+      ),
+      switchMap((initialFields) => this.objectUpdatesService.getFieldUpdates(this.url, initialFields)),
+    );
+  }
 }

src/app/+item-page/edit-item-page/item-relationships/edit-relationship/edit-relationship.component.html

@@ -1,10 +1,10 @@
-<div class="row" *ngIf="item">
+<div class="row" *ngIf="relatedItem$ | async">
   <div class="col-10 relationship">
-    <ds-listable-object-component-loader [object]="item" [viewMode]="viewMode"></ds-listable-object-component-loader>
+    <ds-listable-object-component-loader [object]="relatedItem$ | async" [viewMode]="viewMode"></ds-listable-object-component-loader>
   </div>
   <div class="col-2">
     <div class="btn-group relationship-action-buttons">
-      <button [disabled]="!canRemove()" (click)="remove()"
+      <button [disabled]="!canRemove()" (click)="openVirtualMetadataModal(virtualMetadataModal)"
               class="btn btn-outline-danger btn-sm"
               title="{{'item.edit.metadata.edit.buttons.remove' | translate}}">
         <i class="fas fa-trash-alt fa-fw"></i>
@@ -17,3 +17,14 @@
     </div>
   </div>
 </div>
+<ng-template #virtualMetadataModal>
+  <ds-virtual-metadata
+          [relationshipId]="relationship.id"
+          [leftItem]="leftItem$ | async"
+          [rightItem]="rightItem$ | async"
+          [url]="url"
+          (close)="closeVirtualMetadataModal()"
+          (save)="remove()"
+  >
+  </ds-virtual-metadata>
+</ng-template>

src/app/+item-page/edit-item-page/item-relationships/edit-relationship/edit-relationship.component.spec.ts

@@ -11,11 +11,13 @@ import { Item } from '../../../../core/shared/item.model';
 import { PaginatedList } from '../../../../core/data/paginated-list';
 import { PageInfo } from '../../../../core/shared/page-info.model';
 import { FieldChangeType } from '../../../../core/data/object-updates/object-updates.actions';
+import { NgbModal } from '@ng-bootstrap/ng-bootstrap';
 
-let objectUpdatesService: ObjectUpdatesService;
+let objectUpdatesService;
 const url = 'http://test-url.com/test-url';
 
 let item;
+let relatedItem;
 let author1;
 let author2;
 let fieldUpdate1;
@@ -29,7 +31,9 @@ let de;
 let el;
 
 describe('EditRelationshipComponent', () => {
+
   beforeEach(async(() => {
+
     relationshipType = Object.assign(new RelationshipType(), {
       id: '1',
       uuid: '1',
@@ -37,6 +41,17 @@ describe('EditRelationshipComponent', () => {
       rightwardType: 'isPublicationOfAuthor'
     });
 
+    item = Object.assign(new Item(), {
+      self: 'fake-item-url/publication',
+      id: 'publication',
+      uuid: 'publication',
+      relationships: observableOf(new RemoteData(false, false, true, undefined, new PaginatedList(new PageInfo(), relationships)))
+    });
+
+    relatedItem = Object.assign(new Item(), {
+      uuid: 'related item id',
+    });
+
     relationships = [
       Object.assign(new Relationship(), {
         self: url + '/2',
@@ -44,7 +59,9 @@ describe('EditRelationshipComponent', () => {
         uuid: '2',
         leftId: 'author1',
         rightId: 'publication',
-        relationshipType: observableOf(new RemoteData(false, false, true, undefined, relationshipType))
+        relationshipType: observableOf(new RemoteData(false, false, true, undefined, relationshipType)),
+        leftItem: observableOf(new RemoteData(false, false, true, undefined, relatedItem)),
+        rightItem: observableOf(new RemoteData(false, false, true, undefined, item)),
       }),
       Object.assign(new Relationship(), {
         self: url + '/3',
@@ -56,13 +73,6 @@ describe('EditRelationshipComponent', () => {
       })
     ];
 
-    item = Object.assign(new Item(), {
-      self: 'fake-item-url/publication',
-      id: 'publication',
-      uuid: 'publication',
-      relationships: observableOf(new RemoteData(false, false, true, undefined, new PaginatedList(new PageInfo(), relationships)))
-    });
-
     author1 = Object.assign(new Item(), {
       id: 'author1',
       uuid: 'author1'
@@ -73,31 +83,36 @@ describe('EditRelationshipComponent', () => {
     });
 
     fieldUpdate1 = {
-      field: author1,
+      field: relationships[0],
       changeType: undefined
     };
     fieldUpdate2 = {
-      field: author2,
+      field: relationships[1],
       changeType: FieldChangeType.REMOVE
     };
 
-    objectUpdatesService = jasmine.createSpyObj('objectUpdatesService',
-      {
-        saveChangeFieldUpdate: {},
-        saveRemoveFieldUpdate: {},
-        setEditableFieldUpdate: {},
-        setValidFieldUpdate: {},
-        removeSingleFieldUpdate: {},
-        isEditable: observableOf(false), // should always return something --> its in ngOnInit
-        isValid: observableOf(true) // should always return something --> its in ngOnInit
-      }
-    );
+    const itemSelection = {};
+    itemSelection[relatedItem.uuid] = false;
+    itemSelection[item.uuid] = true;
+
+    objectUpdatesService = {
+      isSelectedVirtualMetadata: () => null,
+      removeSingleFieldUpdate: jasmine.createSpy('removeSingleFieldUpdate'),
+      saveRemoveFieldUpdate: jasmine.createSpy('saveRemoveFieldUpdate'),
+    };
+
+    spyOn(objectUpdatesService, 'isSelectedVirtualMetadata').and.callFake((a, b, uuid) => observableOf(itemSelection[uuid]));
 
     TestBed.configureTestingModule({
       imports: [TranslateModule.forRoot()],
       declarations: [EditRelationshipComponent],
       providers: [
-        { provide: ObjectUpdatesService, useValue: objectUpdatesService }
+        { provide: ObjectUpdatesService, useValue: objectUpdatesService },
+        { provide: NgbModal, useValue: {
+            open: () => {/*comment*/
+            }
+          },
+        },
     ], schemas: [
         NO_ERRORS_SCHEMA
       ]
@@ -105,6 +120,7 @@ describe('EditRelationshipComponent', () => {
   }));
 
   beforeEach(() => {
+
     fixture = TestBed.createComponent(EditRelationshipComponent);
     comp = fixture.componentInstance;
     de = fixture.debugElement;
@@ -112,7 +128,8 @@ describe('EditRelationshipComponent', () => {
 
     comp.url = url;
     comp.fieldUpdate = fieldUpdate1;
-    comp.item = item;
+    comp.editItem = item;
+    comp.relatedItem$ = observableOf(relatedItem);
 
     fixture.detectChanges();
   });
@@ -156,23 +173,30 @@ describe('EditRelationshipComponent', () => {
   });
 
   describe('remove', () => {
+
     beforeEach(() => {
+      spyOn(comp, 'closeVirtualMetadataModal');
+      comp.ngOnChanges();
       comp.remove();
     });
 
-    it('should call saveRemoveFieldUpdate with the correct arguments', () => {
-      expect(objectUpdatesService.saveRemoveFieldUpdate).toHaveBeenCalledWith(url, item);
+    it('should close the virtual metadata modal and call saveRemoveFieldUpdate with the correct arguments', () => {
+      expect(comp.closeVirtualMetadataModal).toHaveBeenCalled();
+      expect(objectUpdatesService.saveRemoveFieldUpdate).toHaveBeenCalledWith(
+        url,
+        Object.assign({}, fieldUpdate1.field, {
+          keepLeftVirtualMetadata: false,
+          keepRightVirtualMetadata: true,
+        }),
+      );
     });
   });
 
   describe('undo', () => {
-    beforeEach(() => {
-      comp.undo();
-    });
 
     it('should call removeSingleFieldUpdate with the correct arguments', () => {
-      expect(objectUpdatesService.removeSingleFieldUpdate).toHaveBeenCalledWith(url, item.uuid);
+      comp.undo();
+      expect(objectUpdatesService.removeSingleFieldUpdate).toHaveBeenCalledWith(url, relationships[0].uuid);
     });
   });
-
 });

src/app/+item-page/edit-item-page/item-relationships/edit-relationship/edit-relationship.component.ts

@@ -1,14 +1,19 @@
-import { Component, Input, OnChanges } from '@angular/core';
-import { FieldUpdate } from '../../../../core/data/object-updates/object-updates.reducer';
-import { cloneDeep } from 'lodash';
-import { Item } from '../../../../core/shared/item.model';
-import { ObjectUpdatesService } from '../../../../core/data/object-updates/object-updates.service';
+import { Component, Input, OnChanges, OnInit } from '@angular/core';
+import { combineLatest as observableCombineLatest, Observable } from 'rxjs';
+import { filter, map, switchMap, take, tap } from 'rxjs/operators';
 import { FieldChangeType } from '../../../../core/data/object-updates/object-updates.actions';
+import { DeleteRelationship, FieldUpdate } from '../../../../core/data/object-updates/object-updates.reducer';
+import { ObjectUpdatesService } from '../../../../core/data/object-updates/object-updates.service';
+import { Relationship } from '../../../../core/shared/item-relationships/relationship.model';
+import { Item } from '../../../../core/shared/item.model';
+import { getRemoteDataPayload, getSucceededRemoteData } from '../../../../core/shared/operators';
 import { ViewMode } from '../../../../core/shared/view-mode.model';
+import { hasValue, isNotEmpty } from '../../../../shared/empty.util';
+import { NgbModal, NgbModalRef } from '@ng-bootstrap/ng-bootstrap';
 
 @Component({
   // tslint:disable-next-line:component-selector
-  selector: '[ds-edit-relationship]',
+  selector: 'ds-edit-relationship',
   styleUrls: ['./edit-relationship.component.scss'],
   templateUrl: './edit-relationship.component.html',
 })
@@ -23,38 +28,108 @@ export class EditRelationshipComponent implements OnChanges {
    */
   @Input() url: string;
 
+  /**
+   * The item being edited
+   */
+  @Input() editItem: Item;
+
+  /**
+   * The relationship being edited
+   */
+  get relationship(): Relationship {
+    return this.fieldUpdate.field as Relationship;
+  }
+
+  private leftItem$: Observable<Item>;
+  private rightItem$: Observable<Item>;
+
   /**
    * The related item of this relationship
    */
-  item: Item;
+  relatedItem$: Observable<Item>;
 
   /**
    * The view-mode we're currently on
    */
   viewMode = ViewMode.ListElement;
 
-  constructor(private objectUpdatesService: ObjectUpdatesService) {
+  /**
+   * Reference to NgbModal
+   */
+  public modalRef: NgbModalRef;
+
+  constructor(
+    private objectUpdatesService: ObjectUpdatesService,
+    private modalService: NgbModal,
+  ) {
   }
 
   /**
    * Sets the current relationship based on the fieldUpdate input field
    */
   ngOnChanges(): void {
-    this.item = cloneDeep(this.fieldUpdate.field) as Item;
+    this.leftItem$ = this.relationship.leftItem.pipe(
+      getSucceededRemoteData(),
+      getRemoteDataPayload(),
+      filter((item: Item) => hasValue(item) && isNotEmpty(item.uuid))
+    );
+    this.rightItem$ = this.relationship.rightItem.pipe(
+      getSucceededRemoteData(),
+      getRemoteDataPayload(),
+      filter((item: Item) => hasValue(item) && isNotEmpty(item.uuid))
+    );
+    this.relatedItem$ = observableCombineLatest(
+      this.leftItem$,
+      this.rightItem$,
+    ).pipe(
+      map((items: Item[]) =>
+        items.find((item) => item.uuid !== this.editItem.uuid)
+      )
+    );
   }
 
   /**
    * Sends a new remove update for this field to the object updates service
    */
   remove(): void {
-    this.objectUpdatesService.saveRemoveFieldUpdate(this.url, this.item);
+    this.closeVirtualMetadataModal();
+    observableCombineLatest(
+      this.leftItem$,
+      this.rightItem$,
+    ).pipe(
+      map((items: Item[]) =>
+        items.map((item) => this.objectUpdatesService
+          .isSelectedVirtualMetadata(this.url, this.relationship.id, item.uuid))
+      ),
+      switchMap((selection$) => observableCombineLatest(selection$)),
+      map((selection: boolean[]) => {
+        return Object.assign({},
+          this.fieldUpdate.field,
+          {
+            keepLeftVirtualMetadata: selection[0] === true,
+            keepRightVirtualMetadata: selection[1] === true,
+          }
+        ) as DeleteRelationship
+      }),
+      take(1),
+    ).subscribe((deleteRelationship: DeleteRelationship) =>
+      this.objectUpdatesService.saveRemoveFieldUpdate(this.url, deleteRelationship)
+    );
+  }
+
+  openVirtualMetadataModal(content: any) {
+    this.modalRef = this.modalService.open(content);
+  }
+
+  closeVirtualMetadataModal() {
+    this.modalRef.close();
   }
 
   /**
    * Cancels the current update for this field in the object updates service
    */
   undo(): void {
-    this.objectUpdatesService.removeSingleFieldUpdate(this.url, this.item.uuid);
+    this.objectUpdatesService.removeSingleFieldUpdate(this.url, this.fieldUpdate.field.uuid);
   }
 
   /**

src/app/+item-page/edit-item-page/item-relationships/item-relationships.component.html

@@ -17,8 +17,13 @@
       <span class="d-none d-sm-inline">&nbsp;{{"item.edit.metadata.save-button" | translate}}</span>
     </button>
   </div>
-  <div *ngFor="let label of relationLabels$ | async" class="mb-4">
-    <ds-edit-relationship-list [item]="item" [url]="url" [relationshipLabel]="label" ></ds-edit-relationship-list>
+  <div *ngFor="let relationshipType of relationshipTypes$ | async" class="mb-4">
+    <ds-edit-relationship-list
+            [url]="url"
+            [item]="item"
+            [itemType]="entityType$ | async"
+            [relationshipType]="relationshipType"
+    ></ds-edit-relationship-list>
   </div>
   <div class="button-row bottom">
     <div class="float-right">

src/app/+item-page/edit-item-page/item-relationships/item-relationships.component.spec.ts

@@ -13,9 +13,8 @@ import { ActivatedRoute, Router } from '@angular/router';
 import { NotificationsService } from '../../../shared/notifications/notifications.service';
 import { GLOBAL_CONFIG } from '../../../../config';
 import { RelationshipType } from '../../../core/shared/item-relationships/relationship-type.model';
-import { ResourceType } from '../../../core/shared/resource-type';
 import { Relationship } from '../../../core/shared/item-relationships/relationship.model';
-import { of as observableOf, combineLatest as observableCombineLatest } from 'rxjs';
+import { combineLatest as observableCombineLatest, of as observableOf } from 'rxjs';
 import { RemoteData } from '../../../core/data/remote-data';
 import { Item } from '../../../core/shared/item.model';
 import { PaginatedList } from '../../../core/data/paginated-list';
@@ -26,6 +25,8 @@ import { ObjectCacheService } from '../../../core/cache/object-cache.service';
 import { getTestScheduler } from 'jasmine-marbles';
 import { RestResponse } from '../../../core/cache/response.models';
 import { RequestService } from '../../../core/data/request.service';
+import { EntityTypeService } from '../../../core/data/entity-type.service';
+import { ItemType } from '../../../core/shared/item-relationships/item-type.model';
 
 let comp: any;
 let fixture: ComponentFixture<ItemRelationshipsComponent>;
@@ -34,6 +35,7 @@ let el: HTMLElement;
 let objectUpdatesService;
 let relationshipService;
 let requestService;
+let entityTypeService;
 let objectCache;
 const infoNotification: INotification = new Notification('id', NotificationType.Info, 'info');
 const warningNotification: INotification = new Notification('id', NotificationType.Warning, 'warning');
@@ -58,6 +60,7 @@ let author1;
 let author2;
 let fieldUpdate1;
 let fieldUpdate2;
+let entityType;
 let relationships;
 let relationshipType;
 
@@ -95,6 +98,10 @@ describe('ItemRelationshipsComponent', () => {
       lastModified: date
     });
 
+    entityType = Object.assign(new ItemType(), {
+      id: 'entityType',
+    });
+
     author1 = Object.assign(new Item(), {
       id: 'author1',
       uuid: 'author1'
@@ -110,11 +117,14 @@ describe('ItemRelationshipsComponent', () => {
     relationships[1].rightItem = observableOf(new RemoteData(false, false, true, undefined, item));
 
     fieldUpdate1 = {
-      field: author1,
+      field: relationships[0],
       changeType: undefined
     };
     fieldUpdate2 = {
-      field: author2,
+      field: Object.assign(
+        relationships[1],
+        {keepLeftVirtualMetadata: true, keepRightVirtualMetadata: false}
+      ),
       changeType: FieldChangeType.REMOVE
     };
 
@@ -130,12 +140,12 @@ describe('ItemRelationshipsComponent', () => {
     objectUpdatesService = jasmine.createSpyObj('objectUpdatesService',
       {
         getFieldUpdates: observableOf({
-          [author1.uuid]: fieldUpdate1,
-          [author2.uuid]: fieldUpdate2
+          [relationships[0].uuid]: fieldUpdate1,
+          [relationships[1].uuid]: fieldUpdate2
         }),
         getFieldUpdatesExclusive: observableOf({
-          [author1.uuid]: fieldUpdate1,
-          [author2.uuid]: fieldUpdate2
+          [relationships[0].uuid]: fieldUpdate1,
+          [relationships[1].uuid]: fieldUpdate2
         }),
         saveAddFieldUpdate: {},
         discardFieldUpdates: {},
@@ -173,6 +183,25 @@ describe('ItemRelationshipsComponent', () => {
       remove: undefined
     });
 
+    entityTypeService = jasmine.createSpyObj('entityTypeService',
+      {
+        getEntityTypeByLabel: observableOf(new RemoteData(
+          false,
+          false,
+          true,
+          null,
+          entityType,
+        )),
+        getEntityTypeRelationships: observableOf(new RemoteData(
+          false,
+          false,
+          true,
+          null,
+          new PaginatedList(new PageInfo(), [relationshipType]),
+        )),
+      }
+    );
+
     scheduler = getTestScheduler();
     TestBed.configureTestingModule({
       imports: [SharedModule, TranslateModule.forRoot()],
@@ -185,6 +214,7 @@ describe('ItemRelationshipsComponent', () => {
         { provide: NotificationsService, useValue: notificationsService },
         { provide: GLOBAL_CONFIG, useValue: { item: { edit: { undoTimeout: 10 } } } as any },
         { provide: RelationshipService, useValue: relationshipService },
+        { provide: EntityTypeService, useValue: entityTypeService },
         { provide: ObjectCacheService, useValue: objectCache },
         { provide: RequestService, useValue: requestService },
         ChangeDetectorRef
@@ -229,7 +259,7 @@ describe('ItemRelationshipsComponent', () => {
     });
 
     it('it should delete the correct relationship', () => {
-      expect(relationshipService.deleteRelationship).toHaveBeenCalledWith(relationships[1].uuid);
+      expect(relationshipService.deleteRelationship).toHaveBeenCalledWith(relationships[1].uuid, 'left');
     });
   });
 });

src/app/+item-page/edit-item-page/item-relationships/item-relationships.component.ts

@@ -1,8 +1,8 @@
 import { ChangeDetectorRef, Component, Inject, OnDestroy } from '@angular/core';
 import { Item } from '../../../core/shared/item.model';
-import { FieldUpdate, FieldUpdates } from '../../../core/data/object-updates/object-updates.reducer';
+import { DeleteRelationship, FieldUpdate, FieldUpdates } from '../../../core/data/object-updates/object-updates.reducer';
 import { Observable } from 'rxjs/internal/Observable';
-import { filter, flatMap, map, switchMap, take, tap } from 'rxjs/operators';
+import { filter, map, switchMap, take } from 'rxjs/operators';
 import { zip as observableZip } from 'rxjs';
 import { AbstractItemUpdateComponent } from '../abstract-item-update/abstract-item-update.component';
 import { ItemDataService } from '../../../core/data/item-data.service';
@@ -12,15 +12,18 @@ import { NotificationsService } from '../../../shared/notifications/notification
 import { TranslateService } from '@ngx-translate/core';
 import { GLOBAL_CONFIG, GlobalConfig } from '../../../../config';
 import { RelationshipService } from '../../../core/data/relationship.service';
-import { FieldChangeType } from '../../../core/data/object-updates/object-updates.actions';
-import { Relationship } from '../../../core/shared/item-relationships/relationship.model';
 import { ErrorResponse, RestResponse } from '../../../core/cache/response.models';
-import { isNotEmptyOperator } from '../../../shared/empty.util';
 import { RemoteData } from '../../../core/data/remote-data';
 import { ObjectCacheService } from '../../../core/cache/object-cache.service';
-import { getSucceededRemoteData } from '../../../core/shared/operators';
+import { getRemoteDataPayload, getSucceededRemoteData } from '../../../core/shared/operators';
 import { RequestService } from '../../../core/data/request.service';
 import { Subscription } from 'rxjs/internal/Subscription';
+import { RelationshipType } from '../../../core/shared/item-relationships/relationship-type.model';
+import { ItemType } from '../../../core/shared/item-relationships/item-type.model';
+import { EntityTypeService } from '../../../core/data/entity-type.service';
+import { isNotEmptyOperator } from '../../../shared/empty.util';
+import { FieldChangeType } from '../../../core/data/object-updates/object-updates.actions';
+import { Relationship } from '../../../core/shared/item-relationships/relationship.model';
 
 @Component({
   selector: 'ds-item-relationships',
@@ -35,13 +38,14 @@ export class ItemRelationshipsComponent extends AbstractItemUpdateComponent impl
   /**
    * The labels of all different relations within this item
    */
-  relationLabels$: Observable<string[]>;
+  relationshipTypes$: Observable<RelationshipType[]>;
 
   /**
    * A subscription that checks when the item is deleted in cache and reloads the item by sending a new request
    * This is used to update the item in cache after relationships are deleted
    */
   itemUpdateSubscription: Subscription;
+  entityType$: Observable<ItemType>;
 
   constructor(
     protected itemService: ItemDataService,
@@ -54,7 +58,8 @@ export class ItemRelationshipsComponent extends AbstractItemUpdateComponent impl
     protected relationshipService: RelationshipService,
     protected objectCache: ObjectCacheService,
     protected requestService: RequestService,
-    protected cdRef: ChangeDetectorRef
+    protected entityTypeService: EntityTypeService,
+    protected cdr: ChangeDetectorRef,
   ) {
     super(itemService, objectUpdatesService, router, notificationsService, translateService, EnvConfig, route);
   }
@@ -64,21 +69,14 @@ export class ItemRelationshipsComponent extends AbstractItemUpdateComponent impl
    */
   ngOnInit(): void {
     super.ngOnInit();
-    this.relationLabels$ = this.relationshipService.getRelationshipTypeLabelsByItem(this.item);
-    this.initializeItemUpdate();
-  }
-
-  /**
-   * Update the item (and view) when it's removed in the request cache
-   */
-  public initializeItemUpdate(): void {
     this.itemUpdateSubscription = this.requestService.hasByHrefObservable(this.item.self).pipe(
       filter((exists: boolean) => !exists),
       switchMap(() => this.itemService.findById(this.item.uuid)),
       getSucceededRemoteData(),
     ).subscribe((itemRD: RemoteData<Item>) => {
       this.item = itemRD.payload;
-      this.cdRef.detectChanges();
+      this.cdr.detectChanges();
+      this.initializeUpdates();
     });
   }
 
@@ -86,8 +84,22 @@ export class ItemRelationshipsComponent extends AbstractItemUpdateComponent impl
    * Initialize the values and updates of the current item's relationship fields
    */
   public initializeUpdates(): void {
-    this.updates$ = this.relationshipService.getRelatedItems(this.item).pipe(
-      switchMap((items: Item[]) => this.objectUpdatesService.getFieldUpdates(this.url, items))
+
+    this.entityType$ = this.entityTypeService.getEntityTypeByLabel(
+      this.item.firstMetadataValue('relationship.type')
+    ).pipe(
+      getSucceededRemoteData(),
+      getRemoteDataPayload(),
+    );
+
+    this.relationshipTypes$ = this.entityType$.pipe(
+      switchMap((entityType) =>
+        this.entityTypeService.getEntityTypeRelationships(entityType.id).pipe(
+          getSucceededRemoteData(),
+          getRemoteDataPayload(),
+          map((relationshipTypes) => relationshipTypes.page),
+        )
+      ),
     );
   }
 
@@ -103,26 +115,41 @@ export class ItemRelationshipsComponent extends AbstractItemUpdateComponent impl
    * Make sure the lists are refreshed afterwards and notifications are sent for success and errors
    */
   public submit(): void {
-    // Get all IDs of related items of which their relationship with the current item is about to be removed
-    const removedItemIds$ = this.relationshipService.getRelatedItems(this.item).pipe(
-      switchMap((items: Item[]) => this.objectUpdatesService.getFieldUpdatesExclusive(this.url, items) as Observable<FieldUpdates>),
-      map((fieldUpdates: FieldUpdates) => Object.values(fieldUpdates).filter((fieldUpdate: FieldUpdate) => fieldUpdate.changeType === FieldChangeType.REMOVE)),
-      map((fieldUpdates: FieldUpdate[]) => fieldUpdates.map((fieldUpdate: FieldUpdate) => fieldUpdate.field.uuid) as string[]),
-      isNotEmptyOperator()
-    );
     // Get all the relationships that should be removed
-    const removedRelationships$ = removedItemIds$.pipe(
-      flatMap((uuids) => this.relationshipService.getRelationshipsByRelatedItemIds(this.item, uuids))
-    );
-    // const removedRelationships$ = removedItemIds$.pipe(flatMap((uuids: string[]) => this.relationshipService.getRelationshipsByRelatedItemIds(this.item, uuids)));
-    // Request a delete for every relationship found in the observable created above
-    removedRelationships$.pipe(
+    this.relationshipService.getItemRelationshipsArray(this.item).pipe(
+      map((relationships: Relationship[]) => relationships.map((relationship) =>
+        Object.assign(new Relationship(), relationship, {uuid: relationship.id})
+      )),
+      switchMap((relationships: Relationship[]) => {
+        return this.objectUpdatesService.getFieldUpdatesExclusive(this.url, relationships) as Observable<FieldUpdates>
+      }),
+      map((fieldUpdates: FieldUpdates) =>
+        Object.values(fieldUpdates)
+          .filter((fieldUpdate: FieldUpdate) => fieldUpdate.changeType === FieldChangeType.REMOVE)
+          .map((fieldUpdate: FieldUpdate) => fieldUpdate.field as DeleteRelationship)
+      ),
+      isNotEmptyOperator(),
       take(1),
-      map((removedRelationships: Relationship[]) => removedRelationships.map((rel: Relationship) => rel.id)),
-      switchMap((removedIds: string[]) => observableZip(...removedIds.map((uuid: string) => this.relationshipService.deleteRelationship(uuid))))
+      switchMap((deleteRelationships: DeleteRelationship[]) =>
+        observableZip(...deleteRelationships.map((deleteRelationship) => {
+            let copyVirtualMetadata: string;
+            if (deleteRelationship.keepLeftVirtualMetadata && deleteRelationship.keepRightVirtualMetadata) {
+              copyVirtualMetadata = 'all';
+            } else if (deleteRelationship.keepLeftVirtualMetadata) {
+              copyVirtualMetadata = 'left';
+            } else if (deleteRelationship.keepRightVirtualMetadata) {
+              copyVirtualMetadata = 'right';
+            } else {
+              copyVirtualMetadata = 'none';
+            }
+            return this.relationshipService.deleteRelationship(deleteRelationship.uuid, copyVirtualMetadata);
+          }
+        ))
+      ),
     ).subscribe((responses: RestResponse[]) => {
+      this.itemUpdateSubscription.add(() => {
         this.displayNotifications(responses);
-      this.reset();
+      });
     });
   }
 
@@ -144,22 +171,12 @@ export class ItemRelationshipsComponent extends AbstractItemUpdateComponent impl
     }
   }
 
-  /**
-   * Re-initialize fields and subscriptions
-   */
-  reset() {
-    this.initializeOriginalFields();
-    this.initializeUpdates();
-    this.initializeItemUpdate();
-  }
-
   /**
    * Sends all initial values of this item to the object updates service
    */
   public initializeOriginalFields() {
-    this.relationshipService.getRelatedItems(this.item).pipe(take(1)).subscribe((items: Item[]) => {
-      this.objectUpdatesService.initialize(this.url, items, this.item.lastModified);
-    });
+    const initialFields = [];
+    this.objectUpdatesService.initialize(this.url, initialFields, this.item.lastModified);
   }
 
   /**
@@ -168,5 +185,4 @@ export class ItemRelationshipsComponent extends AbstractItemUpdateComponent impl
   ngOnDestroy(): void {
     this.itemUpdateSubscription.unsubscribe();
   }
-
 }

src/app/+item-page/edit-item-page/virtual-metadata/virtual-metadata.component.html

@@ -0,0 +1,38 @@
+<div>
+    <div class="modal-header">{{'virtual-metadata.delete-relationship.modal-head' | translate}}
+        <button type="button" class="close" (click)="close.emit()" aria-label="Close">
+            <span aria-hidden="true">×</span>
+        </button>
+    </div>
+    <div class="modal-body">
+        <ng-container *ngFor="let item of items; trackBy: trackItem">
+            <div *ngVar="(isSelectedVirtualMetadataItem(item) | async) as selected"
+                 (click)="setSelectedVirtualMetadataItem(item, !selected)"
+                 class="item d-flex flex-row">
+                <div class="m-2">
+                    <label>
+                        <input class="select" type="checkbox" [checked]="selected">
+                    </label>
+                </div>
+                <div class="flex-column">
+                    <ds-listable-object-component-loader [object]="item">
+                    </ds-listable-object-component-loader>
+                    <div *ngFor="let metadata of virtualMetadata.get(item.uuid)">
+                        <div class="font-weight-bold">
+                            {{metadata.metadataField}}
+                        </div>
+                        <div>
+                            {{metadata.metadataValue.value}}
+                        </div>
+                    </div>
+                </div>
+            </div>
+        </ng-container>
+        <div class="d-flex flex-row-reverse m-2">
+            <button class="btn btn-primary save"
+                    (click)="save.emit()">
+                <i class="fas fa-save"></i> {{"item.edit.metadata.save-button" | translate}}
+            </button>
+        </div>
+    </div>
+</div>

src/app/+item-page/edit-item-page/virtual-metadata/virtual-metadata.component.spec.ts

@@ -0,0 +1,102 @@
+import {ComponentFixture, TestBed} from '@angular/core/testing';
+import {of as observableOf} from 'rxjs/internal/observable/of';
+import {TranslateModule} from '@ngx-translate/core';
+import {DebugElement, NO_ERRORS_SCHEMA} from '@angular/core';
+import {By} from '@angular/platform-browser';
+import {VirtualMetadataComponent} from './virtual-metadata.component';
+import {Item} from '../../../core/shared/item.model';
+import {ObjectUpdatesService} from '../../../core/data/object-updates/object-updates.service';
+import {VarDirective} from '../../../shared/utils/var.directive';
+
+describe('VirtualMetadataComponent', () => {
+
+  let comp: VirtualMetadataComponent;
+  let fixture: ComponentFixture<VirtualMetadataComponent>;
+  let de: DebugElement;
+
+  let objectUpdatesService;
+
+  const url = 'http://test-url.com/test-url';
+
+  let item;
+  let relatedItem;
+  let relationshipId;
+
+  beforeEach(() => {
+
+    relationshipId = 'relationship id';
+
+    item = Object.assign(new Item(), {
+      uuid: 'publication',
+      metadata: [],
+    });
+
+    relatedItem = Object.assign(new Item(), {
+      uuid: 'relatedItem',
+      metadata: [],
+    });
+
+    objectUpdatesService = jasmine.createSpyObj('objectUpdatesService', {
+      isSelectedVirtualMetadata: observableOf(false),
+      setSelectedVirtualMetadata: null,
+    });
+
+    TestBed.configureTestingModule({
+      imports: [TranslateModule.forRoot()],
+      declarations: [VirtualMetadataComponent, VarDirective],
+      providers: [
+        {provide: ObjectUpdatesService, useValue: objectUpdatesService},
+      ], schemas: [
+        NO_ERRORS_SCHEMA
+      ]
+    }).compileComponents();
+
+    fixture = TestBed.createComponent(VirtualMetadataComponent);
+    comp = fixture.componentInstance;
+    de = fixture.debugElement;
+
+    comp.url = url;
+    comp.leftItem = item;
+    comp.rightItem = relatedItem;
+    comp.relationshipId = relationshipId;
+
+    fixture.detectChanges();
+  });
+
+  describe('when clicking the save button', () => {
+    it('should emit a save event', () => {
+
+      spyOn(comp.save, 'emit');
+      fixture.debugElement
+        .query(By.css('button.save'))
+        .triggerEventHandler('click', null);
+      expect(comp.save.emit).toHaveBeenCalled();
+    });
+  });
+
+  describe('when clicking the close button', () => {
+    it('should emit a close event', () => {
+
+      spyOn(comp.close, 'emit');
+      fixture.debugElement
+        .query(By.css('button.close'))
+        .triggerEventHandler('click', null);
+      expect(comp.close.emit).toHaveBeenCalled();
+    });
+  });
+
+  describe('when selecting an item', () => {
+    it('should call the updates service setSelectedVirtualMetadata method', () => {
+
+      fixture.debugElement
+        .query(By.css('div.item'))
+        .triggerEventHandler('click', null);
+      expect(objectUpdatesService.setSelectedVirtualMetadata).toHaveBeenCalledWith(
+        url,
+        relationshipId,
+        item.uuid,
+        true
+      );
+    });
+  })
+});

src/app/+item-page/edit-item-page/virtual-metadata/virtual-metadata.component.ts

@@ -0,0 +1,120 @@
+import {Component, EventEmitter, Input, OnInit, Output} from '@angular/core';
+import {Observable} from 'rxjs';
+import {Item} from '../../../core/shared/item.model';
+import {MetadataValue} from '../../../core/shared/metadata.models';
+import {ObjectUpdatesService} from '../../../core/data/object-updates/object-updates.service';
+
+@Component({
+  selector: 'ds-virtual-metadata',
+  templateUrl: './virtual-metadata.component.html'
+})
+/**
+ * Component that lists both items of a relationship, along with their virtual metadata of the relationship.
+ * The component is shown when a relationship is marked to be deleted.
+ * Each item has a checkbox to indicate whether its virtual metadata should be saved as real metadata.
+ */
+export class VirtualMetadataComponent implements OnInit {
+
+  /**
+   * The current url of this page
+   */
+  @Input() url: string;
+
+  /**
+   * The id of the relationship to be deleted.
+   */
+  @Input() relationshipId: string;
+
+  /**
+   * The left item of the relationship to be deleted.
+   */
+  @Input() leftItem: Item;
+
+  /**
+   * The right item of the relationship to be deleted.
+   */
+  @Input() rightItem: Item;
+
+  /**
+   * Emits when the close button is pressed.
+   */
+  @Output() close = new EventEmitter();
+
+  /**
+   * Emits when the save button is pressed.
+   */
+  @Output() save = new EventEmitter();
+
+  /**
+   * Get an array of the left and the right item of the relationship to be deleted.
+   */
+  get items() {
+    return [this.leftItem, this.rightItem];
+  }
+
+  private virtualMetadata: Map<string, VirtualMetadata[]> = new Map<string, VirtualMetadata[]>();
+
+  constructor(
+    protected objectUpdatesService: ObjectUpdatesService,
+  ) {
+  }
+
+  /**
+   * Get the virtual metadata of a given item corresponding to this relationship.
+   * @param item  the item to get the virtual metadata for
+   */
+  getVirtualMetadata(item: Item): VirtualMetadata[] {
+
+    return Object.entries(item.metadata)
+      .map(([key, value]) =>
+        value
+          .filter((metadata: MetadataValue) =>
+            !key.startsWith('relation') && metadata.authority && metadata.authority.endsWith(this.relationshipId))
+          .map((metadata: MetadataValue) => {
+            return {
+              metadataField: key,
+              metadataValue: metadata,
+            }
+          })
+      )
+      .reduce((previous, current) => previous.concat(current), []);
+  }
+
+  /**
+   * Select/deselect the virtual metadata of an item to be saved as real metadata.
+   * @param item      the item for which (not) to save the virtual metadata as real metadata
+   * @param selected  whether or not to save the virtual metadata as real metadata
+   */
+  setSelectedVirtualMetadataItem(item: Item, selected: boolean) {
+    this.objectUpdatesService.setSelectedVirtualMetadata(this.url, this.relationshipId, item.uuid, selected);
+  }
+
+  /**
+   * Check whether the virtual metadata of a given item is selected to be saved as real metadata
+   * @param item  the item for which to check whether the virtual metadata is selected to be saved as real metadata
+   */
+  isSelectedVirtualMetadataItem(item: Item): Observable<boolean> {
+    return this.objectUpdatesService.isSelectedVirtualMetadata(this.url, this.relationshipId, item.uuid);
+  }
+
+  /**
+   * Prevent unnecessary rerendering so fields don't lose focus
+   */
+  trackItem(index, item: Item) {
+    return item && item.uuid;
+  }
+
+  ngOnInit(): void {
+    this.items.forEach((item) => {
+      this.virtualMetadata.set(item.uuid, this.getVirtualMetadata(item));
+    });
+  }
+}
+
+/**
+ * Represents a virtual metadata entry.
+ */
+export interface VirtualMetadata {
+  metadataField: string,
+  metadataValue: MetadataValue,
+}

src/app/+item-page/simple/field-components/specific-field/uri/item-page-uri-field.component.spec.ts

@@ -11,6 +11,7 @@ let fixture: ComponentFixture<ItemPageUriFieldComponent>;
 
 const mockField = 'dc.identifier.uri';
 const mockValue = 'test value';
+const mockLabel = 'test label';
 
 describe('ItemPageUriFieldComponent', () => {
   beforeEach(async(() => {
@@ -32,6 +33,8 @@ describe('ItemPageUriFieldComponent', () => {
     fixture = TestBed.createComponent(ItemPageUriFieldComponent);
     comp = fixture.componentInstance;
     comp.item = mockItemWithMetadataFieldAndValue(mockField, mockValue);
+    comp.fields = [mockField];
+    comp.label = mockLabel;
     fixture.detectChanges();
   }));
 

src/app/+item-page/simple/field-components/specific-field/uri/item-page-uri-field.component.ts

@@ -8,7 +8,8 @@ import { ItemPageFieldComponent } from '../item-page-field.component';
   templateUrl: './item-page-uri-field.component.html'
 })
 /**
- * This component is used for displaying the uri (dc.identifier.uri) metadata of an item
+ * This component can be used to represent any uri on a simple item page.
+ * It expects 4 parameters: The item, a separator, the metadata keys and an i18n key
  */
 export class ItemPageUriFieldComponent extends ItemPageFieldComponent {
 
@@ -21,19 +22,16 @@ export class ItemPageUriFieldComponent extends ItemPageFieldComponent {
    * Separator string between multiple values of the metadata fields defined
    * @type {string}
    */
-  separator: string;
+  @Input() separator: string;
 
   /**
    * Fields (schema.element.qualifier) used to render their values.
-   * In this component, we want to display values for metadata 'dc.identifier.uri'
    */
-  fields: string[] = [
-    'dc.identifier.uri'
-  ];
+  @Input() fields: string[];
 
   /**
    * Label i18n key for the rendered metadata
    */
-  label = 'item.page.uri';
+  @Input() label: string;
 
 }

src/app/+item-page/simple/item-types/publication/publication.component.html

@@ -63,7 +63,10 @@
       [fields]="['dc.identifier.citation']"
       [label]="'item.page.citation'">
     </ds-generic-item-page-field>
-    <ds-item-page-uri-field [item]="object"></ds-item-page-uri-field>
+    <ds-item-page-uri-field [item]="object"
+      [fields]="['dc.identifier.uri']"
+      [label]="'item.page.uri'">
+    </ds-item-page-uri-field>
     <ds-item-page-collections [item]="object"></ds-item-page-collections>
     <div>
       <a class="btn btn-outline-primary" [routerLink]="['/items/' + object.id + '/full']">

src/app/app.component.ts

@@ -1,4 +1,4 @@
-import { filter, map, take } from 'rxjs/operators';
+import { delay, filter, map, take } from 'rxjs/operators';
 import { AfterViewInit, ChangeDetectionStrategy, Component, HostListener, Inject, OnInit, ViewEncapsulation } from '@angular/core';
 import { NavigationCancel, NavigationEnd, NavigationStart, Router } from '@angular/router';
 
@@ -125,8 +125,11 @@ export class AppComponent implements OnInit, AfterViewInit {
   }
 
   ngAfterViewInit() {
-    this.router.events
-      .subscribe((event) => {
+    this.router.events.pipe(
+      // This fixes an ExpressionChangedAfterItHasBeenCheckedError from being thrown while loading the component
+      // More information on this bug-fix: https://blog.angular-university.io/angular-debugging/
+      delay(0)
+    ).subscribe((event) => {
         if (event instanceof NavigationStart) {
           this.isLoading = true;
         } else if (

src/app/core/cache/models/normalized-external-source-entry.model.ts

@@ -28,6 +28,12 @@ export class NormalizedExternalSourceEntry extends NormalizedObject<ExternalSour
   @autoserialize
   value: string;
 
+  /**
+   * The ID of the external source this entry originates from
+   */
+  @autoserialize
+  externalSource: string;
+
   /**
    * Metadata of the entry
    */

src/app/core/cache/response.models.ts

@@ -14,6 +14,7 @@ import { DSpaceObject } from '../shared/dspace-object.model';
 import { NormalizedAuthStatus } from '../auth/models/normalized-auth-status.model';
 import { MetadataSchema } from '../metadata/metadata-schema.model';
 import { MetadataField } from '../metadata/metadata-field.model';
+import { ContentSource } from '../shared/content-source.model';
 
 /* tslint:disable:max-classes-per-file */
 export class RestResponse {
@@ -288,4 +289,17 @@ export class FilteredDiscoveryQueryResponse extends RestResponse {
     super(true, statusCode, statusText);
   }
 }
+
+/**
+ * A successful response containing exactly one MetadataSchema
+ */
+export class ContentSourceSuccessResponse extends RestResponse {
+  constructor(
+    public contentsource: ContentSource,
+    public statusCode: number,
+    public statusText: string,
+  ) {
+    super(true, statusCode, statusText);
+  }
+}
 /* tslint:enable:max-classes-per-file */

src/app/core/core.module.ts

@@ -114,8 +114,10 @@ import { MetadatafieldParsingService } from './data/metadatafield-parsing.servic
 import { NormalizedSubmissionUploadsModel } from './config/models/normalized-config-submission-uploads.model';
 import { NormalizedBrowseEntry } from './shared/normalized-browse-entry.model';
 import { BrowseDefinition } from './shared/browse-definition.model';
+import { ContentSourceResponseParsingService } from './data/content-source-response-parsing.service';
 import { MappedCollectionsReponseParsingService } from './data/mapped-collections-reponse-parsing.service';
 import { ObjectSelectService } from '../shared/object-select/object-select.service';
+import {EntityTypeService} from './data/entity-type.service';
 import { SiteDataService } from './data/site-data.service';
 import { NormalizedSite } from './cache/models/normalized-site.model';
 
@@ -238,6 +240,8 @@ const PROVIDERS = [
   TaskResponseParsingService,
   ClaimedTaskDataService,
   PoolTaskDataService,
+  EntityTypeService,
+  ContentSourceResponseParsingService,
   SearchService,
   SidebarService,
   SearchFilterService,

src/app/core/data/collection-data.service.spec.ts

@@ -1,32 +1,65 @@
 import { CollectionDataService } from './collection-data.service';
-import { HALEndpointServiceStub } from '../../shared/testing/hal-endpoint-service-stub';
-import { getMockRequestService } from '../../shared/mocks/mock-request.service';
-import { HALEndpointService } from '../shared/hal-endpoint.service';
 import { RequestService } from './request.service';
+import { TranslateService } from '@ngx-translate/core';
+import { getMockRequestService } from '../../shared/mocks/mock-request.service';
+import { HALEndpointServiceStub } from '../../shared/testing/hal-endpoint-service-stub';
+import { NotificationsServiceStub } from '../../shared/testing/notifications-service-stub';
+import { getMockTranslateService } from '../../shared/mocks/mock-translate.service';
+import { fakeAsync, tick } from '@angular/core/testing';
+import { ContentSourceRequest, GetRequest, RequestError, UpdateContentSourceRequest } from './request.models';
+import { ContentSource } from '../shared/content-source.model';
+import { of as observableOf } from 'rxjs/internal/observable/of';
+import { RequestEntry } from './request.reducer';
+import { ErrorResponse, RestResponse } from '../cache/response.models';
 import { ObjectCacheService } from '../cache/object-cache.service';
-import { GetRequest } from './request.models';
 import { RemoteDataBuildService } from '../cache/builders/remote-data-build.service';
 
+const url = 'fake-url';
+const collectionId = 'fake-collection-id';
+
 describe('CollectionDataService', () => {
   let service: CollectionDataService;
-  let objectCache: ObjectCacheService;
-  let requestService: RequestService;
-  let halService: HALEndpointService;
-  let rdbService: RemoteDataBuildService;
 
-  const url = 'fake-collections-url';
+  let requestService: RequestService;
+  let translate: TranslateService;
+  let notificationsService: any;
+  let rdbService: RemoteDataBuildService;
+  let objectCache: ObjectCacheService;
+  let halService: any;
+
+  describe('when the requests are successful', () => {
+    beforeEach(() => {
+      createService();
+    });
+
+    describe('when calling getContentSource', () => {
+      let contentSource$;
 
       beforeEach(() => {
-    objectCache = jasmine.createSpyObj('objectCache', {
-      remove: jasmine.createSpy('remove')
-    });
-    requestService = getMockRequestService();
-    halService = Object.assign(new HALEndpointServiceStub(url));
-    rdbService = jasmine.createSpyObj('rdbService', {
-      buildList: jasmine.createSpy('buildList')
+        contentSource$ = service.getContentSource(collectionId);
       });
 
-    service = new CollectionDataService(requestService, rdbService, null, null, null, objectCache, halService, null, null, null);
+      it('should configure a new ContentSourceRequest', fakeAsync(() => {
+        contentSource$.subscribe();
+        tick();
+        expect(requestService.configure).toHaveBeenCalledWith(jasmine.any(ContentSourceRequest));
+      }));
+    });
+
+    describe('when calling updateContentSource', () => {
+      let returnedContentSource$;
+      let contentSource;
+
+      beforeEach(() => {
+        contentSource = new ContentSource();
+        returnedContentSource$ = service.updateContentSource(collectionId, contentSource);
+      });
+
+      it('should configure a new UpdateContentSourceRequest', fakeAsync(() => {
+        returnedContentSource$.subscribe();
+        tick();
+        expect(requestService.configure).toHaveBeenCalledWith(jasmine.any(UpdateContentSourceRequest));
+      }));
     });
 
     describe('getMappedItems', () => {
@@ -41,4 +74,59 @@ describe('CollectionDataService', () => {
       });
     });
 
+  });
+
+  describe('when the requests are unsuccessful', () => {
+    beforeEach(() => {
+      createService(observableOf(Object.assign(new RequestEntry(), {
+        response: new ErrorResponse(Object.assign({
+          statusCode: 422,
+          statusText: 'Unprocessable Entity',
+          message: 'Error message'
+        }))
+      })));
+    });
+
+    describe('when calling updateContentSource', () => {
+      let returnedContentSource$;
+      let contentSource;
+
+      beforeEach(() => {
+        contentSource = new ContentSource();
+        returnedContentSource$ = service.updateContentSource(collectionId, contentSource);
+      });
+
+      it('should configure a new UpdateContentSourceRequest', fakeAsync(() => {
+        returnedContentSource$.subscribe();
+        tick();
+        expect(requestService.configure).toHaveBeenCalledWith(jasmine.any(UpdateContentSourceRequest));
+      }));
+
+      it('should display an error notification', fakeAsync(() => {
+        returnedContentSource$.subscribe();
+        tick();
+        expect(notificationsService.error).toHaveBeenCalled();
+      }));
+    });
+  });
+
+  /**
+   * Create a CollectionDataService used for testing
+   * @param requestEntry$   Supply a requestEntry to be returned by the REST API (optional)
+   */
+  function createService(requestEntry$?) {
+    requestService = getMockRequestService(requestEntry$);
+    rdbService = jasmine.createSpyObj('rdbService', {
+      buildList: jasmine.createSpy('buildList')
+    });
+    objectCache = jasmine.createSpyObj('objectCache', {
+      remove: jasmine.createSpy('remove')
+    });
+    halService = new HALEndpointServiceStub(url);
+    notificationsService = new NotificationsServiceStub();
+    translate = getMockTranslateService();
+
+    service = new CollectionDataService(requestService, rdbService, null, null, null, objectCache, halService, notificationsService, null, null, translate);
+  }
+
 });

src/app/core/data/collection-data.service.ts

@@ -12,25 +12,45 @@ import { CommunityDataService } from './community-data.service';
 import { RequestService } from './request.service';
 import { HALEndpointService } from '../shared/hal-endpoint.service';
 import { NotificationsService } from '../../shared/notifications/notifications.service';
-import { HttpClient } from '@angular/common/http';
+import { HttpClient, HttpHeaders } from '@angular/common/http';
 import { NormalizedObjectBuildService } from '../cache/builders/normalized-object-build.service';
 import { DSOChangeAnalyzer } from './dso-change-analyzer.service';
 import { Observable } from 'rxjs/internal/Observable';
-import {FindListOptions, FindListRequest, GetRequest} from './request.models';
+import {
+  ContentSourceRequest,
+  RestRequest,
+  UpdateContentSourceRequest,
+  GetRequest,
+  FindListOptions
+} from './request.models';
 import { RemoteData } from './remote-data';
 import { PaginatedList } from './paginated-list';
-import { configureRequest } from '../shared/operators';
+import { ContentSource } from '../shared/content-source.model';
+import {
+  configureRequest,
+  filterSuccessfulResponses,
+  getRequestFromRequestHref,
+  getResponseFromEntry
+} from '../shared/operators';
+import { ContentSourceSuccessResponse, RestResponse } from '../cache/response.models';
+import { HttpOptions } from '../dspace-rest-v2/dspace-rest-v2.service';
+import { DSpaceRESTv2Serializer } from '../dspace-rest-v2/dspace-rest-v2.serializer';
+import { hasValue, isNotEmpty, isNotEmptyOperator } from '../../shared/empty.util';
+import { NotificationOptions } from '../../shared/notifications/models/notification-options.model';
+import { TranslateService } from '@ngx-translate/core';
+import { SearchParam } from '../cache/models/search-param.model';
 import { DSOResponseParsingService } from './dso-response-parsing.service';
 import { ResponseParsingService } from './parsing.service';
 import { GenericConstructor } from '../shared/generic-constructor';
-import { hasValue, isNotEmptyOperator } from '../../shared/empty.util';
 import { DSpaceObject } from '../shared/dspace-object.model';
-import { SearchParam } from '../cache/models/search-param.model';
+import { INotification } from '../../shared/notifications/models/notification.model';
 import { PaginatedSearchOptions } from '../../shared/search/paginated-search-options.model';
 
 @Injectable()
 export class CollectionDataService extends ComColDataService<Collection> {
   protected linkPath = 'collections';
+  protected errorTitle = 'collection.source.update.notifications.error.title';
+  protected contentSourceError = 'collection.source.update.notifications.error.content';
 
   constructor(
     protected requestService: RequestService,
@@ -42,7 +62,8 @@ export class CollectionDataService extends ComColDataService<Collection> {
     protected halService: HALEndpointService,
     protected notificationsService: NotificationsService,
     protected http: HttpClient,
-    protected comparator: DSOChangeAnalyzer<Collection>
+    protected comparator: DSOChangeAnalyzer<Collection>,
+    protected translate: TranslateService
   ) {
     super();
   }
@@ -97,6 +118,81 @@ export class CollectionDataService extends ComColDataService<Collection> {
     );
   }
 
+  /**
+   * Get the endpoint for the collection's content harvester
+   * @param collectionId
+   */
+  getHarvesterEndpoint(collectionId: string): Observable<string> {
+    return this.halService.getEndpoint(this.linkPath).pipe(
+      switchMap((href: string) => this.halService.getEndpoint('harvester', `${href}/${collectionId}`))
+    );
+  }
+
+  /**
+   * Get the collection's content harvester
+   * @param collectionId
+   */
+  getContentSource(collectionId: string): Observable<ContentSource> {
+    return this.getHarvesterEndpoint(collectionId).pipe(
+      map((href: string) => new ContentSourceRequest(this.requestService.generateRequestId(), href)),
+      configureRequest(this.requestService),
+      map((request: RestRequest) => request.href),
+      getRequestFromRequestHref(this.requestService),
+      filterSuccessfulResponses(),
+      map((response: ContentSourceSuccessResponse) => response.contentsource)
+    );
+  }
+
+  /**
+   * Update the settings of the collection's content harvester
+   * @param collectionId
+   * @param contentSource
+   */
+  updateContentSource(collectionId: string, contentSource: ContentSource): Observable<ContentSource | INotification> {
+    const requestId = this.requestService.generateRequestId();
+    const serializedContentSource = new DSpaceRESTv2Serializer(ContentSource).serialize(contentSource);
+    const request$ = this.getHarvesterEndpoint(collectionId).pipe(
+      take(1),
+      map((href: string) => {
+        const options: HttpOptions = Object.create({});
+        let headers = new HttpHeaders();
+        headers = headers.append('Content-Type', 'application/json');
+        options.headers = headers;
+        return new UpdateContentSourceRequest(requestId, href, JSON.stringify(serializedContentSource), options);
+      })
+    );
+
+    // Execute the post/put request
+    request$.pipe(
+      configureRequest(this.requestService)
+    ).subscribe();
+
+    // Return updated ContentSource
+    return this.requestService.getByUUID(requestId).pipe(
+      getResponseFromEntry(),
+      map((response: RestResponse) => {
+        if (!response.isSuccessful) {
+          if (hasValue((response as any).errorMessage)) {
+            if (response.statusCode === 422) {
+              return this.notificationsService.error(this.translate.instant(this.errorTitle), this.translate.instant(this.contentSourceError), new NotificationOptions(-1));
+            } else {
+              return this.notificationsService.error(this.translate.instant(this.errorTitle), (response as any).errorMessage, new NotificationOptions(-1));
+            }
+          }
+        } else {
+          return response;
+        }
+      }),
+      isNotEmptyOperator(),
+      map((response: ContentSourceSuccessResponse | INotification) => {
+        if (isNotEmpty((response as any).contentsource)) {
+          return (response as ContentSourceSuccessResponse).contentsource;
+        }
+        return response as INotification;
+      })
+    );
+  }
+
   /**
    * Fetches the endpoint used for mapping items to a collection
    * @param collectionId   The id of the collection to map items to

src/app/core/data/content-source-response-parsing.service.ts

@@ -0,0 +1,31 @@
+import { Injectable } from '@angular/core';
+import { ResponseParsingService } from './parsing.service';
+import { RestRequest } from './request.models';
+import { DSpaceRESTV2Response } from '../dspace-rest-v2/dspace-rest-v2-response.model';
+import { ContentSourceSuccessResponse, RestResponse } from '../cache/response.models';
+import { DSpaceRESTv2Serializer } from '../dspace-rest-v2/dspace-rest-v2.serializer';
+import { ContentSource } from '../shared/content-source.model';
+import { MetadataConfig } from '../shared/metadata-config.model';
+
+@Injectable()
+/**
+ * A ResponseParsingService used to parse DSpaceRESTV2Response coming from the REST API to a ContentSource object
+ * wrapped in a ContentSourceSuccessResponse
+ */
+export class ContentSourceResponseParsingService implements ResponseParsingService {
+
+  parse(request: RestRequest, data: DSpaceRESTV2Response): RestResponse {
+    const payload = data.payload;
+
+    const deserialized = new DSpaceRESTv2Serializer(ContentSource).deserialize(payload);
+
+    let metadataConfigs = [];
+    if (payload._embedded && payload._embedded.harvestermetadata && payload._embedded.harvestermetadata.configs) {
+      metadataConfigs = new DSpaceRESTv2Serializer(MetadataConfig).serializeArray(payload._embedded.harvestermetadata.configs);
+    }
+    deserialized.metadataConfigs = metadataConfigs;
+
+    return new ContentSourceSuccessResponse(deserialized, data.statusCode, data.statusText);
+  }
+
+}

src/app/core/data/data.service.ts

@@ -318,9 +318,11 @@ export abstract class DataService<T extends CacheableObject> {
   /**
    * Delete an existing DSpace Object on the server
    * @param dso The DSpace Object to be removed
-   * Return an observable that emits true when the deletion was successful, false when it failed
+   * @param copyVirtualMetadata (optional parameter) the identifiers of the relationship types for which the virtual
+   *                            metadata should be saved as real metadata
+   * @return an observable that emits true when the deletion was successful, false when it failed
    */
-  delete(dso: T): Observable<boolean> {
+  delete(dso: T, copyVirtualMetadata?: string[]): Observable<boolean> {
     const requestId = this.requestService.generateRequestId();
 
     const hrefObs = this.halService.getEndpoint(this.linkPath).pipe(
@@ -329,6 +331,13 @@ export abstract class DataService<T extends CacheableObject> {
     hrefObs.pipe(
       find((href: string) => hasValue(href)),
       map((href: string) => {
+        if (copyVirtualMetadata) {
+          copyVirtualMetadata.forEach((id) =>
+            href += (href.includes('?') ? '&' : '?')
+              + 'copyVirtualMetadata='
+              + id
+          );
+        }
         const request = new DeleteByIDRequest(requestId, href, dso.uuid);
         this.requestService.configure(request);
       })

src/app/core/data/entity-type.service.ts

@@ -0,0 +1,103 @@
+import { DataService } from './data.service';
+import { RequestService } from './request.service';
+import { RemoteDataBuildService } from '../cache/builders/remote-data-build.service';
+import { NormalizedObjectBuildService } from '../cache/builders/normalized-object-build.service';
+import { Store } from '@ngrx/store';
+import { CoreState } from '../core.reducers';
+import { HALEndpointService } from '../shared/hal-endpoint.service';
+import { ObjectCacheService } from '../cache/object-cache.service';
+import { NotificationsService } from '../../shared/notifications/notifications.service';
+import { HttpClient } from '@angular/common/http';
+import { DefaultChangeAnalyzer } from './default-change-analyzer.service';
+import { Injectable } from '@angular/core';
+import { GetRequest } from './request.models';
+import { Observable } from 'rxjs/internal/Observable';
+import {switchMap, take, tap} from 'rxjs/operators';
+import { RemoteData } from './remote-data';
+import {RelationshipType} from '../shared/item-relationships/relationship-type.model';
+import {PaginatedList} from './paginated-list';
+import {ItemType} from '../shared/item-relationships/item-type.model';
+
+/**
+ * Service handling all ItemType requests
+ */
+@Injectable()
+export class EntityTypeService extends DataService<ItemType> {
+
+  protected linkPath = 'entitytypes';
+  protected forceBypassCache = false;
+
+  constructor(protected requestService: RequestService,
+              protected rdbService: RemoteDataBuildService,
+              protected dataBuildService: NormalizedObjectBuildService,
+              protected store: Store<CoreState>,
+              protected halService: HALEndpointService,
+              protected objectCache: ObjectCacheService,
+              protected notificationsService: NotificationsService,
+              protected http: HttpClient,
+              protected comparator: DefaultChangeAnalyzer<ItemType>) {
+    super();
+  }
+
+  getBrowseEndpoint(options, linkPath?: string): Observable<string> {
+    return this.halService.getEndpoint(this.linkPath);
+  }
+
+  /**
+   * Get the endpoint for the item type's allowed relationship types
+   * @param entityTypeId
+   */
+  getRelationshipTypesEndpoint(entityTypeId: string): Observable<string> {
+    return this.halService.getEndpoint(this.linkPath).pipe(
+      switchMap((href) => this.halService.getEndpoint('relationshiptypes', `${href}/${entityTypeId}`))
+    );
+  }
+
+  /**
+   * Get the allowed relationship types for an entity type
+   * @param entityTypeId
+   */
+  getEntityTypeRelationships(entityTypeId: string): Observable<RemoteData<PaginatedList<RelationshipType>>> {
+
+    const href$ = this.getRelationshipTypesEndpoint(entityTypeId);
+
+    href$.pipe(take(1)).subscribe((href) => {
+      const request = new GetRequest(this.requestService.generateRequestId(), href);
+      this.requestService.configure(request);
+    });
+
+    return this.rdbService.buildList(href$);
+  }
+
+  /**
+   * Get an entity type by their label
+   * @param label
+   */
+  getEntityTypeByLabel(label: string): Observable<RemoteData<ItemType>> {
+
+    // TODO: Remove mock data once REST API supports this
+    /*
+    href$.pipe(take(1)).subscribe((href) => {
+      const request = new GetRequest(this.requestService.generateRequestId(), href);
+      this.requestService.configure(request);
+    });
+
+    return this.rdbService.buildSingle<EntityType>(href$);
+    */
+
+    // Mock:
+    const index = [
+      'Publication',
+      'Person',
+      'Project',
+      'OrgUnit',
+      'Journal',
+      'JournalVolume',
+      'JournalIssue',
+      'DataPackage',
+      'DataFile',
+    ].indexOf(label);
+
+    return this.findById((index + 1) + '');
+  }
+}

src/app/core/data/facet-value-response-parsing.service.ts

@@ -4,7 +4,7 @@ import { ResponseParsingService } from './parsing.service';
 import { RestRequest } from './request.models';
 import { DSpaceRESTV2Response } from '../dspace-rest-v2/dspace-rest-v2-response.model';
 import { DSpaceRESTv2Serializer } from '../dspace-rest-v2/dspace-rest-v2.serializer';
-import { FacetValue } from '../../shared/search/facet-value.model';
+import {FacetValue} from '../../shared/search/facet-value.model';
 import { BaseResponseParsingService } from './base-response-parsing.service';
 import { ObjectCacheService } from '../cache/object-cache.service';
 import { GLOBAL_CONFIG } from '../../../config';

src/app/core/data/item-data.service.spec.ts

@@ -15,6 +15,7 @@ import { NormalizedObjectBuildService } from '../cache/builders/normalized-objec
 import { HttpClient } from '@angular/common/http';
 import { RequestEntry } from './request.reducer';
 import { getMockRequestService } from '../../shared/mocks/mock-request.service';
+import { ExternalSourceEntry } from '../shared/external-source-entry.model';
 
 describe('ItemDataService', () => {
   let scheduler: TestScheduler;
@@ -194,4 +195,24 @@ describe('ItemDataService', () => {
     });
   });
 
+  describe('importExternalSourceEntry', () => {
+    let result;
+
+    const externalSourceEntry = Object.assign(new ExternalSourceEntry(), {
+      display: 'John, Doe',
+      value: 'John, Doe',
+      self: 'http://test-rest.com/server/api/integration/externalSources/orcidV2/entryValues/0000-0003-4851-8004'
+    });
+
+    beforeEach(() => {
+      service = initTestService();
+      spyOn(requestService, 'configure');
+      result = service.importExternalSourceEntry(externalSourceEntry, 'collection-id');
+    });
+
+    it('should configure a POST request', () => {
+      result.subscribe(() => expect(requestService.configure).toHaveBeenCalledWith(jasmine.any(PostRequest)));
+    });
+  });
+
 });

src/app/core/data/item-data.service.ts

@@ -37,6 +37,7 @@ import { HttpOptions } from '../dspace-rest-v2/dspace-rest-v2.service';
 import { Collection } from '../shared/collection.model';
 import { RemoteData } from './remote-data';
 import { PaginatedList } from './paginated-list';
+import { ExternalSourceEntry } from '../shared/external-source-entry.model';
 
 @Injectable()
 export class ItemDataService extends DataService<Item> {
@@ -248,6 +249,40 @@ export class ItemDataService extends DataService<Item> {
     );
   }
 
+  /**
+   * Import an external source entry into a collection
+   * @param externalSourceEntry
+   * @param collectionId
+   */
+  public importExternalSourceEntry(externalSourceEntry: ExternalSourceEntry, collectionId: string): Observable<RemoteData<Item>> {
+    const options: HttpOptions = Object.create({});
+    let headers = new HttpHeaders();
+    headers = headers.append('Content-Type', 'text/uri-list');
+    options.headers = headers;
+
+    const requestId = this.requestService.generateRequestId();
+    const href$ = this.halService.getEndpoint(this.linkPath).pipe(map((href) => `${href}?owningCollection=${collectionId}`));
+
+    href$.pipe(
+      find((href: string) => hasValue(href)),
+      map((href: string) => {
+        const request = new PostRequest(requestId, href, externalSourceEntry.self, options);
+        this.requestService.configure(request);
+      })
+    ).subscribe();
+
+    return this.requestService.getByUUID(requestId).pipe(
+      find((request: RequestEntry) => request.completed),
+      getResponseFromEntry(),
+      map((response: any) => {
+        if (isNotEmpty(response.resourceSelfLinks)) {
+          return response.resourceSelfLinks[0];
+        }
+      }),
+      switchMap((selfLink: string) => this.findByHref(selfLink))
+    );
+  }
+
   /**
    * Get the endpoint for an item's bitstreams
    * @param itemId

src/app/core/data/lookup-relation.service.spec.ts

@@ -10,11 +10,14 @@ import { SearchResult } from '../../shared/search/search-result.model';
 import { Item } from '../shared/item.model';
 import { skip, take } from 'rxjs/operators';
 import { ExternalSource } from '../shared/external-source.model';
+import { RequestService } from './request.service';
+import { of as observableOf } from 'rxjs';
 
 describe('LookupRelationService', () => {
   let service: LookupRelationService;
   let externalSourceService: ExternalSourceService;
   let searchService: SearchService;
+  let requestService: RequestService;
 
   const totalExternal = 8;
   const optionsWithQuery = new PaginatedSearchOptions({ query: 'test-query' });
@@ -35,15 +38,18 @@ describe('LookupRelationService', () => {
     name: 'orcidV2',
     hierarchical: false
   });
+  const searchServiceEndpoint = 'http://test-rest.com/server/api/core/search';
 
   function init() {
     externalSourceService = jasmine.createSpyObj('externalSourceService', {
       getExternalSourceEntries: createSuccessfulRemoteDataObject$(new PaginatedList(new PageInfo({ elementsPerPage: 1, totalElements: totalExternal, totalPages: totalExternal, currentPage: 1 }), [{}]))
     });
     searchService = jasmine.createSpyObj('searchService', {
-      search: createSuccessfulRemoteDataObject$(createPaginatedList(localResults))
+      search: createSuccessfulRemoteDataObject$(createPaginatedList(localResults)),
+      getEndpoint: observableOf(searchServiceEndpoint)
     });
-    service = new LookupRelationService(externalSourceService, searchService);
+    requestService = jasmine.createSpyObj('requestService', ['removeByHrefSubstring']);
+    service = new LookupRelationService(externalSourceService, searchService, requestService);
   }
 
   beforeEach(() => {
@@ -113,4 +119,14 @@ describe('LookupRelationService', () => {
       });
     });
   });
+
+  describe('removeLocalResultsCache', () => {
+    beforeEach(() => {
+      service.removeLocalResultsCache();
+    });
+
+    it('should call requestService\'s removeByHrefSubstring with the search endpoint', () => {
+      expect(requestService.removeByHrefSubstring).toHaveBeenCalledWith(searchServiceEndpoint);
+    });
+  });
 });

src/app/core/data/lookup-relation.service.ts

@@ -15,6 +15,7 @@ import { getAllSucceededRemoteData, getRemoteDataPayload } from '../shared/opera
 import { Injectable } from '@angular/core';
 import { ExternalSource } from '../shared/external-source.model';
 import { ExternalSourceEntry } from '../shared/external-source-entry.model';
+import { RequestService } from './request.service';
 
 /**
  * A service for retrieving local and external entries information during a relation lookup
@@ -35,7 +36,8 @@ export class LookupRelationService {
   });
 
   constructor(protected externalSourceService: ExternalSourceService,
-              protected searchService: SearchService) {
+              protected searchService: SearchService,
+              protected requestService: RequestService) {
   }
 
   /**
@@ -91,4 +93,11 @@ export class LookupRelationService {
       startWith(0)
     );
   }
+
+  /**
+   * Remove cached requests from local results
+   */
+  removeLocalResultsCache() {
+    this.searchService.getEndpoint().subscribe((href) => this.requestService.removeByHrefSubstring(href));
+  }
 }

src/app/core/data/object-updates/object-updates.actions.ts

@@ -1,7 +1,7 @@
-import { type } from '../../../shared/ngrx/type';
-import { Action } from '@ngrx/store';
-import { Identifiable } from './object-updates.reducer';
-import { INotification } from '../../../shared/notifications/models/notification.model';
+import {type} from '../../../shared/ngrx/type';
+import {Action} from '@ngrx/store';
+import {Identifiable} from './object-updates.reducer';
+import {INotification} from '../../../shared/notifications/models/notification.model';
 
 /**
  * The list of ObjectUpdatesAction type definitions
@@ -11,6 +11,7 @@ export const ObjectUpdatesActionTypes = {
   SET_EDITABLE_FIELD: type('dspace/core/cache/object-updates/SET_EDITABLE_FIELD'),
   SET_VALID_FIELD: type('dspace/core/cache/object-updates/SET_VALID_FIELD'),
   ADD_FIELD: type('dspace/core/cache/object-updates/ADD_FIELD'),
+  SELECT_VIRTUAL_METADATA: type('dspace/core/cache/object-updates/SELECT_VIRTUAL_METADATA'),
   DISCARD: type('dspace/core/cache/object-updates/DISCARD'),
   REINSTATE: type('dspace/core/cache/object-updates/REINSTATE'),
   REMOVE: type('dspace/core/cache/object-updates/REMOVE'),
@@ -83,6 +84,41 @@ export class AddFieldUpdateAction implements Action {
   }
 }
 
+/**
+ * An ngrx action to select/deselect virtual metadata in the ObjectUpdates state for a certain page url
+ */
+export class SelectVirtualMetadataAction implements Action {
+
+  type = ObjectUpdatesActionTypes.SELECT_VIRTUAL_METADATA;
+  payload: {
+    url: string,
+    source: string,
+    uuid: string,
+    select: boolean;
+  };
+
+  /**
+   * Create a new SelectVirtualMetadataAction
+   *
+   * @param url
+   *    the unique url of the page for which a field update is added
+   * @param source
+   *    the id of the relationship which adds the virtual metadata
+   * @param uuid
+   *    the id of the item which has the virtual metadata
+   * @param select
+   *    whether to select or deselect the virtual metadata to be saved as real metadata
+   */
+  constructor(
+    url: string,
+    source: string,
+    uuid: string,
+    select: boolean,
+  ) {
+    this.payload = { url, source, uuid, select: select};
+  }
+}
+
 /**
  * An ngrx action to set the editable state of an existing field in the ObjectUpdates state for a certain page url
  */
@@ -242,4 +278,5 @@ export type ObjectUpdatesAction
   | DiscardObjectUpdatesAction
   | ReinstateObjectUpdatesAction
   | RemoveObjectUpdatesAction
-  | RemoveFieldUpdateAction;
+  | RemoveFieldUpdateAction
+  | SelectVirtualMetadataAction;

src/app/core/data/object-updates/object-updates.reducer.spec.ts

@@ -5,10 +5,11 @@ import {
   FieldChangeType,
   InitializeFieldsAction,
   ReinstateObjectUpdatesAction,
-  RemoveFieldUpdateAction, RemoveObjectUpdatesAction,
+  RemoveFieldUpdateAction, RemoveObjectUpdatesAction, SelectVirtualMetadataAction,
   SetEditableFieldUpdateAction, SetValidFieldUpdateAction
 } from './object-updates.actions';
 import { OBJECT_UPDATES_TRASH_PATH, objectUpdatesReducer } from './object-updates.reducer';
+import {Relationship} from '../../shared/item-relationships/relationship.model';
 
 class NullAction extends RemoveFieldUpdateAction {
   type = null;
@@ -44,6 +45,7 @@ const identifiable3 = {
   language: null,
   value: 'Unchanged value'
 };
+const relationship: Relationship = Object.assign(new Relationship(), {uuid: 'test relationship uuid'});
 
 const modDate = new Date(2010, 2, 11);
 const uuid = identifiable1.uuid;
@@ -79,7 +81,10 @@ describe('objectUpdatesReducer', () => {
           changeType: FieldChangeType.ADD
         }
       },
-      lastModified: modDate
+      lastModified: modDate,
+      virtualMetadataSources: {
+        [relationship.uuid]: {[identifiable1.uuid]: true}
+      },
     }
   };
 
@@ -102,7 +107,10 @@ describe('objectUpdatesReducer', () => {
           isValid: true
         },
       },
-      lastModified: modDate
+      lastModified: modDate,
+      virtualMetadataSources: {
+        [relationship.uuid]: {[identifiable1.uuid]: true}
+      },
     },
     [url + OBJECT_UPDATES_TRASH_PATH]: {
       fieldStates: {
@@ -133,7 +141,10 @@ describe('objectUpdatesReducer', () => {
           changeType: FieldChangeType.ADD
         }
       },
-      lastModified: modDate
+      lastModified: modDate,
+      virtualMetadataSources: {
+        [relationship.uuid]: {[identifiable1.uuid]: true}
+      },
     }
   };
 
@@ -195,6 +206,12 @@ describe('objectUpdatesReducer', () => {
     objectUpdatesReducer(testState, action);
   });
 
+  it('should perform the SELECT_VIRTUAL_METADATA action without affecting the previous state', () => {
+    const action = new SelectVirtualMetadataAction(url, relationship.uuid, identifiable1.uuid, true);
+    // testState has already been frozen above
+    objectUpdatesReducer(testState, action);
+  });
+
   it('should initialize all fields when the INITIALIZE action is dispatched, based on the payload', () => {
     const action = new InitializeFieldsAction(url, [identifiable1, identifiable3], modDate);
 
@@ -213,6 +230,7 @@ describe('objectUpdatesReducer', () => {
           },
         },
         fieldUpdates: {},
+        virtualMetadataSources: {},
         lastModified: modDate
       }
     };

src/app/core/data/object-updates/object-updates.reducer.ts

@@ -7,9 +7,13 @@ import {
   ObjectUpdatesActionTypes,
   ReinstateObjectUpdatesAction,
   RemoveFieldUpdateAction,
-  RemoveObjectUpdatesAction, SetEditableFieldUpdateAction, SetValidFieldUpdateAction
+  RemoveObjectUpdatesAction,
+  SetEditableFieldUpdateAction,
+  SetValidFieldUpdateAction,
+  SelectVirtualMetadataAction,
 } from './object-updates.actions';
 import { hasNoValue, hasValue } from '../../../shared/empty.util';
+import {Relationship} from '../../shared/item-relationships/relationship.model';
 
 /**
  * Path where discarded objects are saved
@@ -54,12 +58,36 @@ export interface FieldUpdates {
   [uuid: string]: FieldUpdate;
 }
 
+/**
+ * The states of all virtual metadata selections available for a single page, mapped by the relationship uuid
+ */
+export interface VirtualMetadataSources {
+  [source: string]: VirtualMetadataSource
+}
+
+/**
+ * The selection of virtual metadata for a relationship, mapped by the uuid of either the item or the relationship type
+ */
+export interface VirtualMetadataSource {
+  [uuid: string]: boolean,
+}
+
+/**
+ * A fieldupdate interface which represents a relationship selected to be deleted,
+ * along with a selection of the virtual metadata to keep
+ */
+export interface DeleteRelationship extends Relationship {
+  keepLeftVirtualMetadata: boolean,
+  keepRightVirtualMetadata: boolean,
+}
+
 /**
  * The updated state of a single page
  */
 export interface ObjectUpdatesEntry {
   fieldStates: FieldStates;
-  fieldUpdates: FieldUpdates
+  fieldUpdates: FieldUpdates;
+  virtualMetadataSources: VirtualMetadataSources;
   lastModified: Date;
 }
 
@@ -96,6 +124,9 @@ export function objectUpdatesReducer(state = initialState, action: ObjectUpdates
     case ObjectUpdatesActionTypes.ADD_FIELD: {
       return addFieldUpdate(state, action as AddFieldUpdateAction);
     }
+    case ObjectUpdatesActionTypes.SELECT_VIRTUAL_METADATA: {
+      return selectVirtualMetadata(state, action as SelectVirtualMetadataAction);
+    }
     case ObjectUpdatesActionTypes.DISCARD: {
       return discardObjectUpdates(state, action as DiscardObjectUpdatesAction);
     }
@@ -135,6 +166,7 @@ function initializeFieldsUpdate(state: any, action: InitializeFieldsAction) {
     state[url],
     { fieldStates: fieldStates },
     { fieldUpdates: {} },
+    { virtualMetadataSources: {} },
     { lastModified: lastModifiedServer }
   );
   return Object.assign({}, state, { [url]: newPageState });
@@ -169,6 +201,51 @@ function addFieldUpdate(state: any, action: AddFieldUpdateAction) {
   return Object.assign({}, state, { [url]: newPageState });
 }
 
+/**
+ * Update the selected virtual metadata in the store
+ * @param state The current state
+ * @param action The action to perform on the current state
+ */
+function selectVirtualMetadata(state: any, action: SelectVirtualMetadataAction) {
+
+  const url: string = action.payload.url;
+  const source: string = action.payload.source;
+  const uuid: string = action.payload.uuid;
+  const select: boolean = action.payload.select;
+
+  const pageState: ObjectUpdatesEntry = state[url] || {};
+
+  const virtualMetadataSource = Object.assign(
+    {},
+    pageState.virtualMetadataSources[source],
+    {
+      [uuid]: select,
+    },
+  );
+
+  const virtualMetadataSources = Object.assign(
+    {},
+    pageState.virtualMetadataSources,
+    {
+      [source]: virtualMetadataSource,
+    },
+  );
+
+  const newPageState = Object.assign(
+    {},
+    pageState,
+    {virtualMetadataSources: virtualMetadataSources},
+  );
+
+  return Object.assign(
+    {},
+    state,
+    {
+      [url]: newPageState,
+    }
+  );
+}
+
 /**
  * Discard all updates for a specific action's url in the store
  * @param state The current state

src/app/core/data/object-updates/object-updates.service.spec.ts

@@ -4,13 +4,14 @@ import { ObjectUpdatesService } from './object-updates.service';
 import {
   DiscardObjectUpdatesAction,
   FieldChangeType,
-  InitializeFieldsAction, ReinstateObjectUpdatesAction, RemoveFieldUpdateAction,
+  InitializeFieldsAction, ReinstateObjectUpdatesAction, RemoveFieldUpdateAction, SelectVirtualMetadataAction,
   SetEditableFieldUpdateAction
 } from './object-updates.actions';
 import { of as observableOf } from 'rxjs';
 import { Notification } from '../../../shared/notifications/models/notification.model';
 import { NotificationType } from '../../../shared/notifications/models/notification-type';
 import { OBJECT_UPDATES_TRASH_PATH } from './object-updates.reducer';
+import {Relationship} from '../../shared/item-relationships/relationship.model';
 
 describe('ObjectUpdatesService', () => {
   let service: ObjectUpdatesService;
@@ -22,6 +23,7 @@ describe('ObjectUpdatesService', () => {
   const identifiable2 = { uuid: '26cbb5ce-5786-4e57-a394-b9fcf8eaf241' };
   const identifiable3 = { uuid: 'c5d2c2f7-d757-48bf-84cc-8c9229c8407e' };
   const identifiables = [identifiable1, identifiable2];
+  const relationship: Relationship = Object.assign(new Relationship(), {uuid: 'test relationship uuid'});
 
   const fieldUpdates = {
     [identifiable1.uuid]: { field: identifiable1Updated, changeType: FieldChangeType.UPDATE },
@@ -38,11 +40,11 @@ describe('ObjectUpdatesService', () => {
     };
 
     const objectEntry = {
-      fieldStates, fieldUpdates, lastModified: modDate
+      fieldStates, fieldUpdates, lastModified: modDate, virtualMetadataSources: {}
     };
     store = new Store<CoreState>(undefined, undefined, undefined);
     spyOn(store, 'dispatch');
-    service = new ObjectUpdatesService(store);
+    service = (new ObjectUpdatesService(store));
 
     spyOn(service as any, 'getObjectEntry').and.returnValue(observableOf(objectEntry));
     spyOn(service as any, 'getFieldState').and.callFake((uuid) => {
@@ -251,4 +253,10 @@ describe('ObjectUpdatesService', () => {
     });
   });
 
+  describe('setSelectedVirtualMetadata', () => {
+    it('should dispatch a SELECT_VIRTUAL_METADATA action with the correct URL, relationship, identifiable and boolean', () => {
+      service.setSelectedVirtualMetadata(url, relationship.uuid, identifiable1.uuid, true);
+      expect(store.dispatch).toHaveBeenCalledWith(new SelectVirtualMetadataAction(url, relationship.uuid, identifiable1.uuid, true));
+    });
+  });
 });

src/app/core/data/object-updates/object-updates.service.ts

@@ -8,7 +8,8 @@ import {
   Identifiable,
   OBJECT_UPDATES_TRASH_PATH,
   ObjectUpdatesEntry,
-  ObjectUpdatesState
+  ObjectUpdatesState,
+  VirtualMetadataSource
 } from './object-updates.reducer';
 import { Observable } from 'rxjs';
 import {
@@ -18,10 +19,11 @@ import {
   InitializeFieldsAction,
   ReinstateObjectUpdatesAction,
   RemoveFieldUpdateAction,
+  SelectVirtualMetadataAction,
   SetEditableFieldUpdateAction,
   SetValidFieldUpdateAction
 } from './object-updates.actions';
-import { distinctUntilChanged, filter, map } from 'rxjs/operators';
+import { distinctUntilChanged, filter, map, switchMap } from 'rxjs/operators';
 import { hasNoValue, hasValue, isEmpty, isNotEmpty } from '../../../shared/empty.util';
 import { INotification } from '../../../shared/notifications/models/notification.model';
 
@@ -37,6 +39,10 @@ function filterByUrlAndUUIDFieldStateSelector(url: string, uuid: string): Memoiz
   return createSelector(filterByUrlObjectUpdatesStateSelector(url), (state: ObjectUpdatesEntry) => state.fieldStates[uuid]);
 }
 
+function virtualMetadataSourceSelector(url: string, source: string): MemoizedSelector<CoreState, VirtualMetadataSource> {
+  return createSelector(filterByUrlObjectUpdatesStateSelector(url), (state: ObjectUpdatesEntry) => state.virtualMetadataSources[source]);
+}
+
 /**
  * Service that dispatches and reads from the ObjectUpdates' state in the store
  */
@@ -91,18 +97,24 @@ export class ObjectUpdatesService {
    */
   getFieldUpdates(url: string, initialFields: Identifiable[]): Observable<FieldUpdates> {
     const objectUpdates = this.getObjectEntry(url);
-    return objectUpdates.pipe(map((objectEntry) => {
+    return objectUpdates.pipe(
+      switchMap((objectEntry) => {
         const fieldUpdates: FieldUpdates = {};
+        if (hasValue(objectEntry)) {
           Object.keys(objectEntry.fieldStates).forEach((uuid) => {
-        let fieldUpdate = objectEntry.fieldUpdates[uuid];
-        if (isEmpty(fieldUpdate)) {
-          const identifiable = initialFields.find((object: Identifiable) => object.uuid === uuid);
-          fieldUpdate = { field: identifiable, changeType: undefined };
+            fieldUpdates[uuid] = objectEntry.fieldUpdates[uuid];
+          });
         }
-        fieldUpdates[uuid] = fieldUpdate;
+        return this.getFieldUpdatesExclusive(url, initialFields).pipe(
+          map((fieldUpdatesExclusive) => {
+            Object.keys(fieldUpdatesExclusive).forEach((uuid) => {
+              fieldUpdates[uuid] = fieldUpdatesExclusive[uuid];
             });
             return fieldUpdates;
-    }))
+          })
+        );
+      }),
+    );
   }
 
   /**
@@ -195,6 +207,34 @@ export class ObjectUpdatesService {
     this.saveFieldUpdate(url, field, FieldChangeType.UPDATE);
   }
 
+  /**
+   * Check whether the virtual metadata of a given item is selected to be saved as real metadata
+   * @param url           The URL of the page on which the field resides
+   * @param relationship  The id of the relationship for which to check whether the virtual metadata is selected to be
+   *                      saved as real metadata
+   * @param item          The id of the item for which to check whether the virtual metadata is selected to be
+   *                      saved as real metadata
+   */
+  isSelectedVirtualMetadata(url: string, relationship: string, item: string): Observable<boolean> {
+
+    return this.store
+      .pipe(
+        select(virtualMetadataSourceSelector(url, relationship)),
+        map((virtualMetadataSource) => virtualMetadataSource && virtualMetadataSource[item]),
+    );
+  }
+
+  /**
+   * Method to dispatch a SelectVirtualMetadataAction to the store
+   * @param url The page's URL for which the changes are saved
+   * @param relationship the relationship for which virtual metadata is selected
+   * @param uuid the selection identifier, can either be the item uuid or the relationship type uuid
+   * @param selected whether or not to select the virtual metadata to be saved
+   */
+  setSelectedVirtualMetadata(url: string, relationship: string, uuid: string, selected: boolean) {
+    this.store.dispatch(new SelectVirtualMetadataAction(url, relationship, uuid, selected));
+  }
+
   /**
    * Dispatches a SetEditableFieldUpdateAction to the store to set a field's editable state
    * @param url The URL of the page on which the field resides

src/app/core/data/relationship.service.spec.ts

@@ -54,10 +54,12 @@ describe('RelationshipService', () => {
   });
 
   const relatedItem1 = Object.assign(new Item(), {
+    self: 'fake-item-url/author1',
     id: 'author1',
     uuid: 'author1'
   });
   const relatedItem2 = Object.assign(new Item(), {
+    self: 'fake-item-url/author2',
     id: 'author2',
     uuid: 'author2'
   });
@@ -112,19 +114,19 @@ describe('RelationshipService', () => {
     beforeEach(() => {
       spyOn(service, 'findById').and.returnValue(getRemotedataObservable(relationship1));
       spyOn(objectCache, 'remove');
-      service.deleteRelationship(relationships[0].uuid).subscribe();
+      service.deleteRelationship(relationships[0].uuid, 'right').subscribe();
     });
 
     it('should send a DeleteRequest', () => {
-      const expected = new DeleteRequest(requestService.generateRequestId(), relationshipsEndpointURL + '/' + relationship1.uuid);
+      const expected = new DeleteRequest(requestService.generateRequestId(), relationshipsEndpointURL + '/' + relationship1.uuid + '?copyVirtualMetadata=right');
       expect(requestService.configure).toHaveBeenCalledWith(expected);
     });
 
-    it('should clear the related items their cache', () => {
+    it('should clear the cache of the related items', () => {
       expect(objectCache.remove).toHaveBeenCalledWith(relatedItem1.self);
       expect(objectCache.remove).toHaveBeenCalledWith(item.self);
-      expect(requestService.removeByHrefSubstring).toHaveBeenCalledWith(relatedItem1.uuid);
-      expect(requestService.removeByHrefSubstring).toHaveBeenCalledWith(item.uuid);
+      expect(requestService.removeByHrefSubstring).toHaveBeenCalledWith(relatedItem1.self);
+      expect(requestService.removeByHrefSubstring).toHaveBeenCalledWith(item.self);
     });
   });
 

src/app/core/data/relationship.service.ts

@@ -1,35 +1,47 @@
-import { HttpClient, HttpHeaders } from '@angular/common/http';
 import { Injectable } from '@angular/core';
-import { MemoizedSelector, select, Store } from '@ngrx/store';
-import { combineLatest, combineLatest as observableCombineLatest } from 'rxjs';
-import { distinctUntilChanged, filter, map, mergeMap, startWith, switchMap, take, tap } from 'rxjs/operators';
-import { compareArraysUsingIds, paginatedRelationsToItems, relationsToItems } from '../../+item-page/simple/item-types/shared/item-relationships-utils';
-import { AppState, keySelector } from '../../app.reducer';
-import { hasValue, hasValueOperator, isNotEmpty, isNotEmptyOperator } from '../../shared/empty.util';
 import { ReorderableRelationship } from '../../shared/form/builder/ds-dynamic-form-ui/existing-metadata-list-element/existing-metadata-list-element.component';
-import { RemoveNameVariantAction, SetNameVariantAction } from '../../shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/name-variant.actions';
-import { NameVariantListState } from '../../shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/name-variant.reducer';
-import { NotificationsService } from '../../shared/notifications/notifications.service';
-import { NormalizedObjectBuildService } from '../cache/builders/normalized-object-build.service';
-import { RemoteDataBuildService } from '../cache/builders/remote-data-build.service';
-import { configureRequest, getRemoteDataPayload, getResponseFromEntry, getSucceededRemoteData } from '../shared/operators';
-import { SearchParam } from '../cache/models/search-param.model';
-import { ObjectCacheService } from '../cache/object-cache.service';
-import { DeleteRequest, FindListOptions, PostRequest, RestRequest } from './request.models';
-import { RestResponse } from '../cache/response.models';
-import { CoreState } from '../core.reducers';
-import { HttpOptions } from '../dspace-rest-v2/dspace-rest-v2.service';
+import { RequestService } from './request.service';
 import { HALEndpointService } from '../shared/hal-endpoint.service';
+import { RemoteDataBuildService } from '../cache/builders/remote-data-build.service';
+import { hasValue, hasValueOperator, isNotEmpty, isNotEmptyOperator } from '../../shared/empty.util';
+import { distinctUntilChanged, filter, map, mergeMap, startWith, switchMap, take, tap } from 'rxjs/operators';
+import {
+  configureRequest,
+  getRemoteDataPayload,
+  getResponseFromEntry,
+  getSucceededRemoteData
+} from '../shared/operators';
+import { DeleteRequest, FindListOptions, PostRequest, RestRequest } from './request.models';
+import { Observable } from 'rxjs/internal/Observable';
+import { RestResponse } from '../cache/response.models';
+import { Item } from '../shared/item.model';
+import { Relationship } from '../shared/item-relationships/relationship.model';
 import { RelationshipType } from '../shared/item-relationships/relationship-type.model';
 import { RemoteData, RemoteDataState } from './remote-data';
+import { combineLatest, combineLatest as observableCombineLatest } from 'rxjs';
 import { PaginatedList } from './paginated-list';
 import { ItemDataService } from './item-data.service';
-import { Relationship } from '../shared/item-relationships/relationship.model';
-import { Item } from '../shared/item.model';
+import {
+  compareArraysUsingIds,
+  paginatedRelationsToItems,
+  relationsToItems
+} from '../../+item-page/simple/item-types/shared/item-relationships-utils';
+import { ObjectCacheService } from '../cache/object-cache.service';
 import { DataService } from './data.service';
+import { NormalizedObjectBuildService } from '../cache/builders/normalized-object-build.service';
+import { MemoizedSelector, select, Store } from '@ngrx/store';
+import { CoreState } from '../core.reducers';
+import { NotificationsService } from '../../shared/notifications/notifications.service';
+import { HttpClient, HttpHeaders } from '@angular/common/http';
 import { DefaultChangeAnalyzer } from './default-change-analyzer.service';
-import { RequestService } from './request.service';
-import { Observable } from 'rxjs/internal/Observable';
+import { SearchParam } from '../cache/models/search-param.model';
+import { HttpOptions } from '../dspace-rest-v2/dspace-rest-v2.service';
+import { AppState, keySelector } from '../../app.reducer';
+import { NameVariantListState } from '../../shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/name-variant.reducer';
+import {
+  RemoveNameVariantAction,
+  SetNameVariantAction
+} from '../../shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/name-variant.actions';
 
 const relationshipListsStateSelector = (state: AppState) => state.relationshipLists;
 
@@ -81,15 +93,22 @@ export class RelationshipService extends DataService<Relationship> {
    * Send a delete request for a relationship by ID
    * @param id
    */
-  deleteRelationship(id: string): Observable<RestResponse> {
+  deleteRelationship(id: string, copyVirtualMetadata: string): Observable<RestResponse> {
     return this.getRelationshipEndpoint(id).pipe(
       isNotEmptyOperator(),
       take(1),
-      map((endpointURL: string) => new DeleteRequest(this.requestService.generateRequestId(), endpointURL)),
+      distinctUntilChanged(),
+      map((endpointURL: string) =>
+        new DeleteRequest(this.requestService.generateRequestId(), endpointURL + '?copyVirtualMetadata=' + copyVirtualMetadata)
+      ),
       configureRequest(this.requestService),
       switchMap((restRequest: RestRequest) => this.requestService.getByUUID(restRequest.uuid)),
       getResponseFromEntry(),
-      tap(() => this.removeRelationshipItemsFromCacheByRelationship(id))
+      switchMap((response) =>
+        this.clearRelatedCache(id).pipe(
+          map(() => response),
+        )
+      ),
     );
   }
 
@@ -417,4 +436,26 @@ export class RelationshipService extends DataService<Relationship> {
     return update$;
   }
 
+  /**
+   * Clear object and request caches of the items related to a relationship (left and right items)
+   * @param uuid  The uuid of the relationship for which to clear the related items from the cache
+   */
+  clearRelatedCache(uuid: string): Observable<void> {
+    return this.findById(uuid).pipe(
+      getSucceededRemoteData(),
+      switchMap((rd: RemoteData<Relationship>) =>
+        observableCombineLatest(
+          rd.payload.leftItem.pipe(getSucceededRemoteData()),
+          rd.payload.rightItem.pipe(getSucceededRemoteData())
+        )
+      ),
+      take(1),
+      map(([leftItem, rightItem]) => {
+        this.objectCache.remove(leftItem.payload.self);
+        this.objectCache.remove(rightItem.payload.self);
+        this.requestService.removeByHrefSubstring(leftItem.payload.self);
+        this.requestService.removeByHrefSubstring(rightItem.payload.self);
+      }),
+    );
+  }
 }

src/app/core/data/request.models.ts

@@ -18,6 +18,7 @@ import { MetadataschemaParsingService } from './metadataschema-parsing.service';
 import { MetadatafieldParsingService } from './metadatafield-parsing.service';
 import { URLCombiner } from '../url-combiner/url-combiner';
 import { TaskResponseParsingService } from '../tasks/task-response-parsing.service';
+import { ContentSourceResponseParsingService } from './content-source-response-parsing.service';
 import { MappedCollectionsReponseParsingService } from './mapped-collections-reponse-parsing.service';
 
 /* tslint:disable:max-classes-per-file */
@@ -380,6 +381,26 @@ export class CreateRequest extends PostRequest {
   }
 }
 
+export class ContentSourceRequest extends GetRequest {
+  constructor(uuid: string, href: string) {
+    super(uuid, href);
+  }
+
+  getResponseParser(): GenericConstructor<ResponseParsingService> {
+    return ContentSourceResponseParsingService;
+  }
+}
+
+export class UpdateContentSourceRequest extends PutRequest {
+  constructor(uuid: string, href: string, public body?: any, public options?: HttpOptions) {
+    super(uuid, href, body, options);
+  }
+
+  getResponseParser(): GenericConstructor<ResponseParsingService> {
+    return ContentSourceResponseParsingService;
+  }
+}
+
 /**
  * Request to delete an object based on its identifier
  */

src/app/core/shared/content-source.model.ts

@@ -0,0 +1,60 @@
+import { autoserialize, autoserializeAs, deserializeAs, deserialize } from 'cerialize';
+import { MetadataConfig } from './metadata-config.model';
+
+/**
+ * The type of content harvesting used
+ */
+export enum ContentSourceHarvestType {
+  None = 'NONE',
+  Metadata = 'METADATA_ONLY',
+  MetadataAndRef = 'METADATA_AND_REF',
+  MetadataAndBitstreams = 'METADATA_AND_BITSTREAMS'
+}
+
+/**
+ * A model class that holds information about the Content Source of a Collection
+ */
+export class ContentSource {
+  /**
+   * Unique identifier, this is necessary to store the ContentSource in FieldUpdates
+   * Because the ContentSource coming from the REST API doesn't have a UUID, we're using the selflink
+   */
+  @deserializeAs('self')
+  uuid: string;
+
+  /**
+   * OAI Provider / Source
+   */
+  @autoserializeAs('oai_source')
+  oaiSource: string;
+
+  /**
+   * OAI Specific set ID
+   */
+  @autoserializeAs('oai_set_id')
+  oaiSetId: string;
+
+  /**
+   * The ID of the metadata format used
+   */
+  @autoserializeAs('metadata_config_id')
+  metadataConfigId: string;
+
+  /**
+   * Type of content being harvested
+   * Defaults to 'NONE', meaning the collection doesn't harvest its content from an external source
+   */
+  @autoserializeAs('harvest_type')
+  harvestType = ContentSourceHarvestType.None;
+
+  /**
+   * The available metadata configurations
+   */
+  metadataConfigs: MetadataConfig[];
+
+  /**
+   * The REST link to itself
+   */
+  @deserialize
+  self: string;
+}

src/app/core/shared/external-source-entry.model.ts

@@ -24,6 +24,11 @@ export class ExternalSourceEntry extends ListableObject {
    */
   value: string;
 
+  /**
+   * The ID of the external source this entry originates from
+   */
+  externalSource: string;
+
   /**
    * Metadata of the entry
    */

src/app/core/shared/metadata-config.model.ts

@@ -0,0 +1,19 @@
+/**
+ * A model class that holds information about a certain metadata configuration
+ */
+export class MetadataConfig {
+  /**
+   * A unique indentifier
+   */
+  id: string;
+
+  /**
+   * The label used for display
+   */
+  label: string;
+
+  /**
+   * The namespace of the metadata
+   */
+  nameSpace: string;
+}

src/app/entity-groups/research-entities/submission/item-list-elements/external-source-entry/external-source-entry-list-submission-element.component.html

@@ -1,2 +1,4 @@
-<div>{{object.display}}</div>
-<div *ngIf="uri"><a target="_blank" [href]="uri.value">{{uri.value}}</a></div>
+<div class="d-inline-block">
+  <div>{{object.display}}</div>
+  <div *ngIf="uri"><a target="_blank" [href]="uri.value">{{uri.value}}</a></div>
+</div>

src/app/entity-groups/research-entities/submission/item-list-elements/external-source-entry/external-source-entry-list-submission-element.component.ts

@@ -3,7 +3,7 @@ import { ExternalSourceEntry } from '../../../../../core/shared/external-source-
 import { listableObjectComponent } from '../../../../../shared/object-collection/shared/listable-object/listable-object.decorator';
 import { ViewMode } from '../../../../../core/shared/view-mode.model';
 import { Context } from '../../../../../core/shared/context.model';
-import { Component, OnInit } from '@angular/core';
+import { Component, Inject, OnInit } from '@angular/core';
 import { Metadata } from '../../../../../core/shared/metadata.utils';
 import { MetadataValue } from '../../../../../core/shared/metadata.models';
 

src/app/shared/comcol-forms/edit-comcol-page/edit-comcol-page.component.ts

@@ -2,10 +2,8 @@ import { Component, OnInit } from '@angular/core';
 import { Observable } from 'rxjs';
 import { ActivatedRoute, Router } from '@angular/router';
 import { RemoteData } from '../../../core/data/remote-data';
-import { isNotEmpty, isNotUndefined } from '../../empty.util';
+import { isNotEmpty } from '../../empty.util';
 import { first, map } from 'rxjs/operators';
-import { getSucceededRemoteData } from '../../../core/shared/operators';
-import { DataService } from '../../../core/data/data.service';
 import { DSpaceObject } from '../../../core/shared/dspace-object.model';
 
 /**

src/app/shared/form/builder/ds-dynamic-form-ui/ds-dynamic-form-control-container.component.ts

@@ -97,6 +97,7 @@ import { PaginatedList } from '../../../../core/data/paginated-list';
 import { ItemSearchResult } from '../../../object-collection/shared/item-search-result.model';
 import { CdkDragDrop, moveItemInArray } from '@angular/cdk/drag-drop';
 import { Relationship } from '../../../../core/shared/item-relationships/relationship.model';
+import { Collection } from '../../../../core/shared/collection.model';
 
 export function dsDynamicFormControlMapFn(model: DynamicFormControlModel): Type<DynamicFormControl> | null {
   switch (model.type) {
@@ -185,6 +186,7 @@ export class DsDynamicFormControlContainerComponent extends DynamicFormControlCo
   hasRelationLookup: boolean;
   modalRef: NgbModalRef;
   item: Item;
+  collection: Collection;
   listId: string;
   searchConfig: string;
 
@@ -236,19 +238,18 @@ export class DsDynamicFormControlContainerComponent extends DynamicFormControlCo
     if (this.hasRelationLookup) {
 
       this.listId = 'list-' + this.model.relationship.relationshipType;
-      const item$ = this.submissionObjectService
+
+      const submissionObject$ = this.submissionObjectService
         .findById(this.model.submissionId).pipe(
-          getAllSucceededRemoteData(),
-          getRemoteDataPayload(),
-          switchMap((submissionObject: SubmissionObject) => (submissionObject.item as Observable<RemoteData<Item>>)
-            .pipe(
           getAllSucceededRemoteData(),
           getRemoteDataPayload()
-            )
-          )
         );
 
+      const item$ = submissionObject$.pipe(switchMap((submissionObject: SubmissionObject) => (submissionObject.item as Observable<RemoteData<Item>>).pipe(getAllSucceededRemoteData(), getRemoteDataPayload())));
+      const collection$ = submissionObject$.pipe(switchMap((submissionObject: SubmissionObject) => (submissionObject.collection as Observable<RemoteData<Collection>>).pipe(getAllSucceededRemoteData(), getRemoteDataPayload())));
+
       this.subs.push(item$.subscribe((item) => this.item = item));
+      this.subs.push(collection$.subscribe((collection) => this.collection = collection));
       this.reorderables$ = item$.pipe(
         switchMap((item) => this.relationService.getItemRelationshipsByLabel(item, this.model.relationship.relationshipType)
           .pipe(
@@ -343,6 +344,7 @@ export class DsDynamicFormControlContainerComponent extends DynamicFormControlCo
     modalComp.label = this.model.label;
     modalComp.metadataFields = this.model.metadataFields;
     modalComp.item = this.item;
+    modalComp.collection = this.collection;
   }
 
   /**

src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/dynamic-lookup-relation-modal.component.html

@@ -25,12 +25,14 @@
                  [title]="'submission.sections.describe.relationship-lookup.search-tab.tab-title.' + source.id | translate  : {count: (totalExternal$ | async)[idx]}">
             <ng-template ngbTabContent>
                 <ds-dynamic-lookup-relation-external-source-tab
+                        [label]="label"
                         [listId]="listId"
-                        [repeatable]="repeatable"
+                        [item]="item"
+                        [collection]="collection"
+                        [relationship]="relationshipOptions"
                         [context]="context"
                         [externalSource]="source"
-                        (selectObject)="select($event)"
-                        (deselectObject)="deselect($event)"
+                        (importedObject)="imported($event)"
                         class="d-block pt-3">
                 </ds-dynamic-lookup-relation-external-source-tab>
             </ng-template>

src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/dynamic-lookup-relation-modal.component.scss

@@ -1,3 +1,11 @@
 .modal-footer {
     justify-content: space-between;
 }
+
+/* Render child-modals slightly smaller than this modal to avoid complete overlap */
+:host {
+  ::ng-deep .modal-content {
+    width: 90%;
+    margin: 5%;
+  }
+}

src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/dynamic-lookup-relation-modal.component.ts

@@ -66,6 +66,11 @@ export class DsDynamicLookupRelationModalComponent implements OnInit, OnDestroy
    */
   item;
 
+  /**
+   * The collection we're submitting an item to
+   */
+  collection;
+
   /**
    * Is the selection repeatable?
    */
@@ -233,6 +238,15 @@ export class DsDynamicLookupRelationModalComponent implements OnInit, OnDestroy
     )
   }
 
+  /**
+   * Called when an external object has been imported, resets the total values and adds the object to the selected list
+   * @param object
+   */
+  imported(object) {
+    this.setTotals();
+    this.select(object);
+  }
+
   /**
    * Calculate and set the total entries available for each tab
    */

src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/external-source-tab/dynamic-lookup-relation-external-source-tab.component.html

@@ -10,13 +10,13 @@
       <ng-container *ngVar="(entriesRD$ | async) as entriesRD">
         <ds-viewable-collection *ngIf="entriesRD?.hasSucceeded && !entriesRD?.isLoading && entriesRD?.payload?.page?.length > 0" @fadeIn
                                 [objects]="entriesRD"
-                                [selectable]="true"
                                 [selectionConfig]="{ repeatable: repeatable, listId: listId }"
                                 [config]="initialPagination"
                                 [hideGear]="true"
                                 [context]="context"
-                                (deselectObject)="deselectObject.emit($event)"
-                                (selectObject)="selectObject.emit($event)">
+                                [importable]="true"
+                                [importConfig]="importConfig"
+                                (importObject)="import($event)">
         </ds-viewable-collection>
         <ds-loading *ngIf="!entriesRD || !entriesRD?.payload || entriesRD?.isLoading"
                     message="{{'loading.search-results' | translate}}"></ds-loading>

src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/external-source-tab/dynamic-lookup-relation-external-source-tab.component.spec.ts

@@ -3,7 +3,7 @@ import { async, ComponentFixture, TestBed } from '@angular/core/testing';
 import { VarDirective } from '../../../../../utils/var.directive';
 import { TranslateModule } from '@ngx-translate/core';
 import { RouterTestingModule } from '@angular/router/testing';
-import { NO_ERRORS_SCHEMA } from '@angular/core';
+import { EventEmitter, NO_ERRORS_SCHEMA } from '@angular/core';
 import { PaginatedSearchOptions } from '../../../../../search/paginated-search-options.model';
 import { SearchConfigurationService } from '../../../../../../core/shared/search/search-configuration.service';
 import { of as observableOf } from 'rxjs/internal/observable/of';
@@ -18,12 +18,20 @@ import { ExternalSource } from '../../../../../../core/shared/external-source.mo
 import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
 import { By } from '@angular/platform-browser';
 import { ExternalSourceEntry } from '../../../../../../core/shared/external-source-entry.model';
+import { NgbModule } from '@ng-bootstrap/ng-bootstrap';
+import { SelectableListService } from '../../../../../object-list/selectable-list/selectable-list.service';
+import { Item } from '../../../../../../core/shared/item.model';
+import { Collection } from '../../../../../../core/shared/collection.model';
+import { RelationshipOptions } from '../../../models/relationship-options.model';
+import { ExternalSourceEntryImportModalComponent } from './external-source-entry-import-modal/external-source-entry-import-modal.component';
 
 describe('DsDynamicLookupRelationExternalSourceTabComponent', () => {
   let component: DsDynamicLookupRelationExternalSourceTabComponent;
   let fixture: ComponentFixture<DsDynamicLookupRelationExternalSourceTabComponent>;
   let pSearchOptions;
   let externalSourceService;
+  let selectableListService;
+  let modalService;
 
   const externalSource = {
     id: 'orcidV2',
@@ -68,6 +76,10 @@ describe('DsDynamicLookupRelationExternalSourceTabComponent', () => {
       }
     })
   ] as ExternalSourceEntry[];
+  const item = Object.assign(new Item(), { id: 'submission-item' });
+  const collection = Object.assign(new Collection(), { id: 'submission-collection' });
+  const relationship = Object.assign(new RelationshipOptions(), { relationshipType: 'isAuthorOfPublication' });
+  const label = 'Author';
 
   function init() {
     pSearchOptions = new PaginatedSearchOptions({
@@ -76,20 +88,22 @@ describe('DsDynamicLookupRelationExternalSourceTabComponent', () => {
     externalSourceService = jasmine.createSpyObj('externalSourceService', {
       getExternalSourceEntries: createSuccessfulRemoteDataObject$(createPaginatedList(externalEntries))
     });
+    selectableListService = jasmine.createSpyObj('selectableListService', ['selectSingle']);
   }
 
   beforeEach(async(() => {
     init();
     TestBed.configureTestingModule({
       declarations: [DsDynamicLookupRelationExternalSourceTabComponent, VarDirective],
-      imports: [TranslateModule.forRoot(), RouterTestingModule.withRoutes([]), BrowserAnimationsModule],
+      imports: [TranslateModule.forRoot(), RouterTestingModule.withRoutes([]), NgbModule.forRoot(), BrowserAnimationsModule],
       providers: [
         {
           provide: SearchConfigurationService, useValue: {
             paginatedSearchOptions: observableOf(pSearchOptions)
           }
         },
-        { provide: ExternalSourceService, useValue: externalSourceService }
+        { provide: ExternalSourceService, useValue: externalSourceService },
+        { provide: SelectableListService, useValue: selectableListService }
       ],
       schemas: [NO_ERRORS_SCHEMA]
     }).compileComponents();
@@ -99,13 +113,18 @@ describe('DsDynamicLookupRelationExternalSourceTabComponent', () => {
     fixture = TestBed.createComponent(DsDynamicLookupRelationExternalSourceTabComponent);
     component = fixture.componentInstance;
     component.externalSource = externalSource;
+    component.item = item;
+    component.collection = collection;
+    component.relationship = relationship;
+    component.label = label;
+    modalService = (component as any).modalService;
     fixture.detectChanges();
   });
 
   describe('when the external entries finished loading successfully', () => {
     it('should display a ds-viewable-collection component', () => {
-      const collection = fixture.debugElement.query(By.css('ds-viewable-collection'));
-      expect(collection).toBeDefined();
+      const viewableCollection = fixture.debugElement.query(By.css('ds-viewable-collection'));
+      expect(viewableCollection).toBeDefined();
     });
   });
 
@@ -116,8 +135,8 @@ describe('DsDynamicLookupRelationExternalSourceTabComponent', () => {
     });
 
     it('should not display a ds-viewable-collection component', () => {
-      const collection = fixture.debugElement.query(By.css('ds-viewable-collection'));
-      expect(collection).toBeNull();
+      const viewableCollection = fixture.debugElement.query(By.css('ds-viewable-collection'));
+      expect(viewableCollection).toBeNull();
     });
 
     it('should display a ds-loading component', () => {
@@ -133,8 +152,8 @@ describe('DsDynamicLookupRelationExternalSourceTabComponent', () => {
     });
 
     it('should not display a ds-viewable-collection component', () => {
-      const collection = fixture.debugElement.query(By.css('ds-viewable-collection'));
-      expect(collection).toBeNull();
+      const viewableCollection = fixture.debugElement.query(By.css('ds-viewable-collection'));
+      expect(viewableCollection).toBeNull();
     });
 
     it('should display a ds-error component', () => {
@@ -150,8 +169,8 @@ describe('DsDynamicLookupRelationExternalSourceTabComponent', () => {
     });
 
     it('should not display a ds-viewable-collection component', () => {
-      const collection = fixture.debugElement.query(By.css('ds-viewable-collection'));
-      expect(collection).toBeNull();
+      const viewableCollection = fixture.debugElement.query(By.css('ds-viewable-collection'));
+      expect(viewableCollection).toBeNull();
     });
 
     it('should display a message the list is empty', () => {
@@ -159,4 +178,15 @@ describe('DsDynamicLookupRelationExternalSourceTabComponent', () => {
       expect(empty).not.toBeNull();
     });
   });
+
+  describe('import', () => {
+    beforeEach(() => {
+      spyOn(modalService, 'open').and.returnValue(Object.assign({ componentInstance: Object.assign({ importedObject: new EventEmitter<any>() }) }));
+      component.import(externalEntries[0]);
+    });
+
+    it('should open a new ExternalSourceEntryImportModalComponent', () => {
+      expect(modalService.open).toHaveBeenCalledWith(ExternalSourceEntryImportModalComponent, jasmine.any(Object))
+    });
+  });
 });

src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/external-source-tab/dynamic-lookup-relation-external-source-tab.component.ts

@@ -1,4 +1,4 @@
-import { Component, EventEmitter, Input, OnInit, Output } from '@angular/core';
+import { Component, EventEmitter, Input, OnDestroy, OnInit, Output } from '@angular/core';
 import { SEARCH_CONFIG_SERVICE } from '../../../../../../+my-dspace-page/my-dspace-page.component';
 import { SearchConfigurationService } from '../../../../../../core/shared/search/search-configuration.service';
 import { Router } from '@angular/router';
@@ -14,6 +14,14 @@ import { Context } from '../../../../../../core/shared/context.model';
 import { ListableObject } from '../../../../../object-collection/shared/listable-object.model';
 import { fadeIn, fadeInOut } from '../../../../../animations/fade';
 import { PaginationComponentOptions } from '../../../../../pagination/pagination-component-options.model';
+import { RelationshipOptions } from '../../../models/relationship-options.model';
+import { NgbModal, NgbModalRef } from '@ng-bootstrap/ng-bootstrap';
+import { ExternalSourceEntryImportModalComponent } from './external-source-entry-import-modal/external-source-entry-import-modal.component';
+import { Subscription } from 'rxjs/internal/Subscription';
+import { hasValue } from '../../../../../empty.util';
+import { SelectableListService } from '../../../../../object-list/selectable-list/selectable-list.service';
+import { Item } from '../../../../../../core/shared/item.model';
+import { Collection } from '../../../../../../core/shared/collection.model';
 
 @Component({
   selector: 'ds-dynamic-lookup-relation-external-source-tab',
@@ -31,11 +39,12 @@ import { PaginationComponentOptions } from '../../../../../pagination/pagination
   ]
 })
 /**
- * The tab displaying a list of importable entries for an external source
+ * Component rendering the tab content of an external source during submission lookup
+ * Shows a list of entries matching the current search query with the option to import them into the repository
  */
-export class DsDynamicLookupRelationExternalSourceTabComponent implements OnInit {
+export class DsDynamicLookupRelationExternalSourceTabComponent implements OnInit, OnDestroy {
   /**
-   * The label to use to display i18n messages (describing the type of relationship)
+   * The label to use for all messages (added to the end of relevant i18n keys)
    */
   @Input() label: string;
 
@@ -45,27 +54,32 @@ export class DsDynamicLookupRelationExternalSourceTabComponent implements OnInit
   @Input() listId: string;
 
   /**
-   * Is the selection repeatable?
+   * The item in submission
    */
-  @Input() repeatable: boolean;
+  @Input() item: Item;
 
   /**
-   * The context to display lists
+   * The collection the user is submitting an item into
+   */
+  @Input() collection: Collection;
+
+  /**
+   * The relationship-options for the current lookup
+   */
+  @Input() relationship: RelationshipOptions;
+
+  /**
+   * The context to displaying lists for
    */
   @Input() context: Context;
 
   /**
-   * Send an event to deselect an object from the list
+   * Emit an event when an object has been imported (or selected from similar local entries)
    */
-  @Output() deselectObject: EventEmitter<ListableObject> = new EventEmitter<ListableObject>();
+  @Output() importedObject: EventEmitter<ListableObject> = new EventEmitter<ListableObject>();
 
   /**
-   * Send an event to select an object from the list
-   */
-  @Output() selectObject: EventEmitter<ListableObject> = new EventEmitter<ListableObject>();
-
-  /**
-   * The initial pagination to start with
+   * The initial pagination options
    */
   initialPagination = Object.assign(new PaginationComponentOptions(), {
     id: 'submission-external-source-relation-list',
@@ -82,15 +96,68 @@ export class DsDynamicLookupRelationExternalSourceTabComponent implements OnInit
    */
   entriesRD$: Observable<RemoteData<PaginatedList<ExternalSourceEntry>>>;
 
+  /**
+   * Config to use for the import buttons
+   */
+  importConfig;
+
+  /**
+   * The modal for importing the entry
+   */
+  modalRef: NgbModalRef;
+
+  /**
+   * Subscription to the modal's importedObject event-emitter
+   */
+  importObjectSub: Subscription;
+
   constructor(private router: Router,
               public searchConfigService: SearchConfigurationService,
-              private externalSourceService: ExternalSourceService) {
+              private externalSourceService: ExternalSourceService,
+              private modalService: NgbModal,
+              private selectableListService: SelectableListService) {
   }
 
+  /**
+   * Get the entries for the selected external source
+   */
   ngOnInit(): void {
     this.entriesRD$ = this.searchConfigService.paginatedSearchOptions.pipe(
       switchMap((searchOptions: PaginatedSearchOptions) =>
         this.externalSourceService.getExternalSourceEntries(this.externalSource.id, searchOptions).pipe(startWith(undefined)))
-    )
+    );
+    this.importConfig = {
+      buttonLabel: 'submission.sections.describe.relationship-lookup.external-source.import-button-title.' + this.label
+    };
+  }
+
+  /**
+   * Start the import of an entry by opening up an import modal window
+   * @param entry The entry to import
+   */
+  import(entry) {
+    this.modalRef = this.modalService.open(ExternalSourceEntryImportModalComponent, {
+      size: 'lg',
+      container: 'ds-dynamic-lookup-relation-modal'
+    });
+    const modalComp = this.modalRef.componentInstance;
+    modalComp.externalSourceEntry = entry;
+    modalComp.item = this.item;
+    modalComp.collection = this.collection;
+    modalComp.relationship = this.relationship;
+    modalComp.label = this.label;
+    this.importObjectSub = modalComp.importedObject.subscribe((object) => {
+      this.selectableListService.selectSingle(this.listId, object);
+      this.importedObject.emit(object);
+    });
+  }
+
+  /**
+   * Unsubscribe from open subscriptions
+   */
+  ngOnDestroy(): void {
+    if (hasValue(this.importObjectSub)) {
+      this.importObjectSub.unsubscribe();
+    }
   }
 }

src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/external-source-tab/external-source-entry-import-modal/external-source-entry-import-modal.component.html

@@ -0,0 +1,61 @@
+<div class="modal-header">
+  <h4 class="modal-title" id="modal-title">{{ (labelPrefix + label + '.title') | translate }}</h4>
+  <button type="button" class="close" aria-label="Close button" aria-describedby="modal-title"
+          (click)="modal.dismiss()">
+    <span aria-hidden="true">&times;</span>
+  </button>
+</div>
+<div class="modal-body">
+  <h4>{{ (labelPrefix + 'head.' + externalSourceEntry.externalSource | translate) }}</h4>
+  <div id="external-source-entry-information" class="mb-3">
+    <div><span>{{externalSourceEntry.display}}</span></div>
+    <div *ngIf="uri"><a href="{{uri.value}}">{{uri.value}}</a></div>
+  </div>
+
+  <h4>{{ (labelPrefix + 'select' | translate) }}</h4>
+
+  <div id="external-source-entry-entities" class="mb-3">
+    <h5 class="font-weight-bold">{{ (labelPrefix + 'entities' | translate) }}</h5>
+
+    <div id="external-source-entry-collection" class="mb-3">
+      <div class="form-group">
+        <label for="collection">{{ (labelPrefix + 'collection' | translate) }}</label>
+        <input type="text" class="form-control" id="collection" placeholder="Enter collection ID" [(ngModel)]="collectionId">
+      </div>
+    </div>
+
+    <ds-search-results *ngIf="(localEntitiesRD$ | async)?.payload?.page?.length > 0"
+                       [searchResults]="(localEntitiesRD$ | async)"
+                       [sortConfig]="this.lookupRelationService.searchConfig?.sort"
+                       [searchConfig]="this.lookupRelationService.searchConfig"
+                       [selectable]="true"
+                       [disableHeader]="true"
+                       [hidePaginationDetail]="true"
+                       [selectionConfig]="{ repeatable: false, listId: entityListId }"
+                       [linkType]="linkTypes.ExternalLink"
+                       [context]="context"
+                       (deselectObject)="deselectEntity()"
+                       (selectObject)="selectEntity($event)">
+    </ds-search-results>
+    <div class="ml-4">
+      <input class="form-check-input" type="radio" name="new-entity" id="new-entity" value="new-entity" (click)="selectNewEntity()" [checked]="selectedImportType === importType.NewEntity" />
+      <label class="form-check-label" for="new-entity">{{ (labelPrefix + 'entities.new' | translate) }}</label>
+    </div>
+  </div>
+  <div id="external-source-entry-authority" *ngIf="authorityEnabled">
+    <h5 class="font-weight-bold">{{ (labelPrefix + 'authority' | translate) }}</h5>
+
+    <div class="ml-4">
+      <input class="form-check-input" type="radio" name="new-authority" id="new-authority" value="new-authority" (click)="selectNewAuthority()" [checked]="selectedImportType === importType.NewAuthority" />
+      <label class="form-check-label" for="new-authority">{{ (labelPrefix + 'authority.new' | translate) }}</label>
+    </div>
+  </div>
+</div>
+<div class="modal-footer">
+  <div>
+    <button type="button" class="btn btn-outline-secondary" (click)="close()">{{ (labelPrefix + 'cancel' | translate) }}</button>
+  </div>
+  <div>
+    <button type="button" class="btn btn-primary" [disabled]="selectedImportType === importType.None" (click)="import()">{{ (labelPrefix + 'import' | translate) }}</button>
+  </div>
+</div>

src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/external-source-tab/external-source-entry-import-modal/external-source-entry-import-modal.component.scss

@@ -0,0 +1,3 @@
+.modal-footer {
+  justify-content: space-between;
+}

src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/external-source-tab/external-source-entry-import-modal/external-source-entry-import-modal.component.spec.ts

@@ -0,0 +1,194 @@
+import { ExternalSourceEntryImportModalComponent, ImportType } from './external-source-entry-import-modal.component';
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+import { TranslateModule } from '@ngx-translate/core';
+import { RouterTestingModule } from '@angular/router/testing';
+import { NO_ERRORS_SCHEMA } from '@angular/core';
+import { NgbActiveModal, NgbModule } from '@ng-bootstrap/ng-bootstrap';
+import { LookupRelationService } from '../../../../../../../core/data/lookup-relation.service';
+import { ExternalSourceEntry } from '../../../../../../../core/shared/external-source-entry.model';
+import { Item } from '../../../../../../../core/shared/item.model';
+import { ItemSearchResult } from '../../../../../../object-collection/shared/item-search-result.model';
+import { createPaginatedList, createSuccessfulRemoteDataObject$ } from '../../../../../../testing/utils';
+import { Collection } from '../../../../../../../core/shared/collection.model';
+import { RelationshipOptions } from '../../../../models/relationship-options.model';
+import { SelectableListService } from '../../../../../../object-list/selectable-list/selectable-list.service';
+import { ItemDataService } from '../../../../../../../core/data/item-data.service';
+import { NotificationsService } from '../../../../../../notifications/notifications.service';
+
+describe('DsDynamicLookupRelationExternalSourceTabComponent', () => {
+  let component: ExternalSourceEntryImportModalComponent;
+  let fixture: ComponentFixture<ExternalSourceEntryImportModalComponent>;
+  let lookupRelationService: LookupRelationService;
+  let selectService: SelectableListService;
+  let itemService: ItemDataService;
+  let notificationsService: NotificationsService;
+  let modalStub: NgbActiveModal;
+
+  const uri = 'https://orcid.org/0001-0001-0001-0001';
+  const entry = Object.assign(new ExternalSourceEntry(), {
+    id: '0001-0001-0001-0001',
+    display: 'John Doe',
+    value: 'John, Doe',
+    metadata: {
+      'dc.identifier.uri': [
+        {
+          value: uri
+        }
+      ]
+    }
+  });
+
+  const label = 'Author';
+  const relationship = Object.assign(new RelationshipOptions(), { relationshipType: 'isAuthorOfPublication' });
+  const submissionCollection = Object.assign(new Collection(), { uuid: '9398affe-a977-4992-9a1d-6f00908a259f' });
+  const submissionItem = Object.assign(new Item(), { uuid: '26224069-5f99-412a-9e9b-7912a7e35cb1' });
+  const item1 = Object.assign(new Item(), { uuid: 'e1c51c69-896d-42dc-8221-1d5f2ad5516e' });
+  const item2 = Object.assign(new Item(), { uuid: 'c8279647-1acc-41ae-b036-951d5f65649b' });
+  const item3 = Object.assign(new Item(), { uuid: 'c3bcbff5-ec0c-4831-8e4c-94b9c933ccac' });
+  const searchResult1 = Object.assign(new ItemSearchResult(), { indexableObject: item1 });
+  const searchResult2 = Object.assign(new ItemSearchResult(), { indexableObject: item2 });
+  const searchResult3 = Object.assign(new ItemSearchResult(), { indexableObject: item3 });
+  const importedItem = Object.assign(new Item(), { uuid: '5d0098fc-344a-4067-a57d-457092b72e82' });
+
+  function init() {
+    lookupRelationService = jasmine.createSpyObj('lookupRelationService', {
+      getLocalResults: createSuccessfulRemoteDataObject$(createPaginatedList([searchResult1, searchResult2, searchResult3])),
+      removeLocalResultsCache: {}
+    });
+    selectService = jasmine.createSpyObj('selectService', ['deselectAll']);
+    notificationsService = jasmine.createSpyObj('notificationsService', ['success']);
+    itemService = jasmine.createSpyObj('itemService', {
+      importExternalSourceEntry: createSuccessfulRemoteDataObject$(importedItem)
+    });
+    modalStub = jasmine.createSpyObj('modal', ['close']);
+  }
+
+  beforeEach(async(() => {
+    init();
+    TestBed.configureTestingModule({
+      declarations: [ExternalSourceEntryImportModalComponent],
+      imports: [TranslateModule.forRoot(), RouterTestingModule.withRoutes([]), NgbModule.forRoot()],
+      providers: [
+        { provide: LookupRelationService, useValue: lookupRelationService },
+        { provide: SelectableListService, useValue: selectService },
+        { provide: NotificationsService, useValue: notificationsService },
+        { provide: ItemDataService, useValue: itemService },
+        { provide: NgbActiveModal, useValue: modalStub }
+      ],
+      schemas: [NO_ERRORS_SCHEMA]
+    }).compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(ExternalSourceEntryImportModalComponent);
+    component = fixture.componentInstance;
+    component.externalSourceEntry = entry;
+    component.label = label;
+    component.relationship = relationship;
+    component.collection = submissionCollection;
+    component.item = submissionItem;
+    fixture.detectChanges();
+  });
+
+  describe('close', () => {
+    beforeEach(() => {
+      component.close();
+    });
+
+    it('should close the modal', () => {
+      expect(modalStub.close).toHaveBeenCalled();
+    });
+  });
+
+  describe('selectEntity', () => {
+    const entity = Object.assign(new Item(), { uuid: 'd8698de5-5b05-4ea4-9d02-da73803a50f9' });
+
+    beforeEach(() => {
+      component.selectEntity(entity);
+    });
+
+    it('should set selected entity', () => {
+      expect(component.selectedEntity).toBe(entity);
+    });
+
+    it('should set the import type to local entity', () => {
+      expect(component.selectedImportType).toEqual(ImportType.LocalEntity);
+    });
+  });
+
+  describe('deselectEntity', () => {
+    const entity = Object.assign(new Item(), { uuid: 'd8698de5-5b05-4ea4-9d02-da73803a50f9' });
+
+    beforeEach(() => {
+      component.selectedImportType = ImportType.LocalEntity;
+      component.selectedEntity = entity;
+      component.deselectEntity();
+    });
+
+    it('should remove the selected entity', () => {
+      expect(component.selectedEntity).toBeUndefined();
+    });
+
+    it('should set the import type to none', () => {
+      expect(component.selectedImportType).toEqual(ImportType.None);
+    });
+  });
+
+  describe('selectNewEntity', () => {
+    describe('when current import type is set to new entity', () => {
+      beforeEach(() => {
+        component.selectedImportType = ImportType.NewEntity;
+        component.selectNewEntity();
+      });
+
+      it('should set the import type to none', () => {
+        expect(component.selectedImportType).toEqual(ImportType.None);
+      });
+    });
+
+    describe('when current import type is not set to new entity', () => {
+      beforeEach(() => {
+        component.selectedImportType = ImportType.None;
+        component.selectNewEntity();
+      });
+
+      it('should set the import type to new entity', () => {
+        expect(component.selectedImportType).toEqual(ImportType.NewEntity);
+      });
+
+      it('should deselect the entity and authority list', () => {
+        expect(selectService.deselectAll).toHaveBeenCalledWith(component.entityListId);
+        expect(selectService.deselectAll).toHaveBeenCalledWith(component.authorityListId);
+      });
+    });
+  });
+
+  describe('selectNewAuthority', () => {
+    describe('when current import type is set to new authority', () => {
+      beforeEach(() => {
+        component.selectedImportType = ImportType.NewAuthority;
+        component.selectNewAuthority();
+      });
+
+      it('should set the import type to none', () => {
+        expect(component.selectedImportType).toEqual(ImportType.None);
+      });
+    });
+
+    describe('when current import type is not set to new authority', () => {
+      beforeEach(() => {
+        component.selectedImportType = ImportType.None;
+        component.selectNewAuthority();
+      });
+
+      it('should set the import type to new authority', () => {
+        expect(component.selectedImportType).toEqual(ImportType.NewAuthority);
+      });
+
+      it('should deselect the entity and authority list', () => {
+        expect(selectService.deselectAll).toHaveBeenCalledWith(component.entityListId);
+        expect(selectService.deselectAll).toHaveBeenCalledWith(component.authorityListId);
+      });
+    });
+  });
+});

src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/external-source-tab/external-source-entry-import-modal/external-source-entry-import-modal.component.ts

@@ -0,0 +1,311 @@
+import { Component, EventEmitter, OnInit } from '@angular/core';
+import { NgbActiveModal } from '@ng-bootstrap/ng-bootstrap';
+import { ExternalSourceEntry } from '../../../../../../../core/shared/external-source-entry.model';
+import { MetadataValue } from '../../../../../../../core/shared/metadata.models';
+import { Metadata } from '../../../../../../../core/shared/metadata.utils';
+import { Observable } from 'rxjs/internal/Observable';
+import { RemoteData } from '../../../../../../../core/data/remote-data';
+import { PaginatedList } from '../../../../../../../core/data/paginated-list';
+import { SearchResult } from '../../../../../../search/search-result.model';
+import { Item } from '../../../../../../../core/shared/item.model';
+import { RelationshipOptions } from '../../../../models/relationship-options.model';
+import { LookupRelationService } from '../../../../../../../core/data/lookup-relation.service';
+import { PaginatedSearchOptions } from '../../../../../../search/paginated-search-options.model';
+import { CollectionElementLinkType } from '../../../../../../object-collection/collection-element-link.type';
+import { Context } from '../../../../../../../core/shared/context.model';
+import { SelectableListService } from '../../../../../../object-list/selectable-list/selectable-list.service';
+import { ListableObject } from '../../../../../../object-collection/shared/listable-object.model';
+import { Collection } from '../../../../../../../core/shared/collection.model';
+import { ItemDataService } from '../../../../../../../core/data/item-data.service';
+import { PaginationComponentOptions } from '../../../../../../pagination/pagination-component-options.model';
+import { getRemoteDataPayload, getSucceededRemoteData } from '../../../../../../../core/shared/operators';
+import { take } from 'rxjs/operators';
+import { ItemSearchResult } from '../../../../../../object-collection/shared/item-search-result.model';
+import { NotificationsService } from '../../../../../../notifications/notifications.service';
+import { TranslateService } from '@ngx-translate/core';
+
+/**
+ * The possible types of import for the external entry
+ */
+export enum ImportType {
+  None = 'None',
+  LocalEntity = 'LocalEntity',
+  LocalAuthority = 'LocalAuthority',
+  NewEntity = 'NewEntity',
+  NewAuthority = 'NewAuthority'
+}
+
+@Component({
+  selector: 'ds-external-source-entry-import-modal',
+  styleUrls: ['./external-source-entry-import-modal.component.scss'],
+  templateUrl: './external-source-entry-import-modal.component.html'
+})
+/**
+ * Component to display a modal window for importing an external source entry
+ * Shows information about the selected entry and a selectable list of local entities and authorities with similar names
+ * and the ability to add one of those results to the selection instead of the external entry.
+ * The other option is to import the external entry as a new entity or authority into the repository.
+ */
+export class ExternalSourceEntryImportModalComponent implements OnInit {
+  /**
+   * The prefix for every i18n key within this modal
+   */
+  labelPrefix = 'submission.sections.describe.relationship-lookup.external-source.import-modal.';
+
+  /**
+   * The label to use for all messages (added to the end of relevant i18n keys)
+   */
+  label: string;
+
+  /**
+   * The external source entry
+   */
+  externalSourceEntry: ExternalSourceEntry;
+
+  /**
+   * The item in submission
+   */
+  item: Item;
+
+  /**
+   * The collection the user is submitting in
+   */
+  collection: Collection;
+
+  /**
+   * The ID of the collection to import entries to
+   */
+  collectionId: string;
+
+  /**
+   * The current relationship-options used for filtering results
+   */
+  relationship: RelationshipOptions;
+
+  /**
+   * The metadata value for the entry's uri
+   */
+  uri: MetadataValue;
+
+  /**
+   * Local entities with a similar name
+   */
+  localEntitiesRD$: Observable<RemoteData<PaginatedList<SearchResult<Item>>>>;
+
+  /**
+   * Search options to use for fetching similar results
+   */
+  searchOptions: PaginatedSearchOptions;
+
+  /**
+   * The type of link to render in listable elements
+   */
+  linkTypes = CollectionElementLinkType;
+
+  /**
+   * The context we're currently in (submission)
+   */
+  context = Context.SubmissionModal;
+
+  /**
+   * List ID for selecting local entities
+   */
+  entityListId = 'external-source-import-entity';
+
+  /**
+   * List ID for selecting local authorities
+   */
+  authorityListId = 'external-source-import-authority';
+
+  /**
+   * ImportType enum
+   */
+  importType = ImportType;
+
+  /**
+   * The type of import the user currently has selected
+   */
+  selectedImportType = ImportType.None;
+
+  /**
+   * The selected local entity
+   */
+  selectedEntity: ListableObject;
+
+  /**
+   * The selected local authority
+   */
+  selectedAuthority: ListableObject;
+
+  /**
+   * An object has been imported, send it to the parent component
+   */
+  importedObject: EventEmitter<ListableObject> = new EventEmitter<ListableObject>();
+
+  /**
+   * Should it display the ability to import the entry as an authority?
+   */
+  authorityEnabled = false;
+
+  constructor(public modal: NgbActiveModal,
+              public lookupRelationService: LookupRelationService,
+              private selectService: SelectableListService,
+              private itemService: ItemDataService,
+              private notificationsService: NotificationsService,
+              private translateService: TranslateService) {
+  }
+
+  ngOnInit(): void {
+    this.uri = Metadata.first(this.externalSourceEntry.metadata, 'dc.identifier.uri');
+    const pagination = Object.assign(new PaginationComponentOptions(), { id: 'external-entry-import', pageSize: 5 });
+    this.searchOptions = Object.assign(new PaginatedSearchOptions({ query: this.externalSourceEntry.value, pagination: pagination }));
+    this.localEntitiesRD$ = this.lookupRelationService.getLocalResults(this.relationship, this.searchOptions);
+    this.collectionId = this.collection.id;
+  }
+
+  /**
+   * Close the window
+   */
+  close() {
+    this.modal.close();
+  }
+
+  /**
+   * Perform the import of the external entry
+   */
+  import() {
+    switch (this.selectedImportType) {
+      case ImportType.LocalEntity : {
+        this.importLocalEntity();
+        break;
+      }
+      case ImportType.NewEntity : {
+        this.importNewEntity();
+        break;
+      }
+      case ImportType.LocalAuthority : {
+        this.importLocalAuthority();
+        break;
+      }
+      case ImportType.NewAuthority : {
+        this.importNewAuthority();
+        break;
+      }
+    }
+    this.selectedImportType = ImportType.None;
+    this.deselectAllLists();
+    this.close();
+  }
+
+  /**
+   * Import the selected local entity
+   */
+  importLocalEntity() {
+    if (this.selectedEntity !== undefined) {
+      this.notificationsService.success(this.translateService.get(this.labelPrefix + this.label + '.added.local-entity'));
+      this.importedObject.emit(this.selectedEntity);
+    }
+  }
+
+  /**
+   * Create and import a new entity from the external entry
+   */
+  importNewEntity() {
+    this.itemService.importExternalSourceEntry(this.externalSourceEntry, this.collectionId).pipe(
+      getSucceededRemoteData(),
+      getRemoteDataPayload(),
+      take(1)
+    ).subscribe((item: Item) => {
+      this.lookupRelationService.removeLocalResultsCache();
+      const searchResult = Object.assign(new ItemSearchResult(), {
+        indexableObject: item
+      });
+      this.notificationsService.success(this.translateService.get(this.labelPrefix + this.label + '.added.new-entity'));
+      this.importedObject.emit(searchResult);
+    });
+  }
+
+  /**
+   * Import the selected local authority
+   */
+  importLocalAuthority() {
+    // TODO: Implement ability to import local authorities
+  }
+
+  /**
+   * Create and import a new authority from the external entry
+   */
+  importNewAuthority() {
+    // TODO: Implement ability to import new authorities
+  }
+
+  /**
+   * Deselected a local entity
+   */
+  deselectEntity() {
+    this.selectedEntity = undefined;
+    if (this.selectedImportType === ImportType.LocalEntity) {
+      this.selectedImportType = ImportType.None;
+    }
+  }
+
+  /**
+   * Selected a local entity
+   * @param entity
+   */
+  selectEntity(entity) {
+    this.selectedEntity = entity;
+    this.selectedImportType = ImportType.LocalEntity;
+  }
+
+  /**
+   * Selected/deselected the new entity option
+   */
+  selectNewEntity() {
+    if (this.selectedImportType === ImportType.NewEntity) {
+      this.selectedImportType = ImportType.None;
+    } else {
+      this.selectedImportType = ImportType.NewEntity;
+      this.deselectAllLists();
+    }
+  }
+
+  /**
+   * Deselected a local authority
+   */
+  deselectAuthority() {
+    this.selectedAuthority = undefined;
+    if (this.selectedImportType === ImportType.LocalAuthority) {
+      this.selectedImportType = ImportType.None;
+    }
+  }
+
+  /**
+   * Selected a local authority
+   * @param authority
+   */
+  selectAuthority(authority) {
+    this.selectedAuthority = authority;
+    this.selectedImportType = ImportType.LocalAuthority;
+  }
+
+  /**
+   * Selected/deselected the new authority option
+   */
+  selectNewAuthority() {
+    if (this.selectedImportType === ImportType.NewAuthority) {
+      this.selectedImportType = ImportType.None;
+    } else {
+      this.selectedImportType = ImportType.NewAuthority;
+      this.deselectAllLists();
+    }
+  }
+
+  /**
+   * Deselect every element from both entity and authority lists
+   */
+  deselectAllLists() {
+    this.selectService.deselectAll(this.entityListId);
+    this.selectService.deselectAll(this.authorityListId);
+  }
+}

src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/relationship.effects.ts

@@ -128,7 +128,7 @@ export class RelationshipEffects {
     this.relationshipService.getRelationshipByItemsAndLabel(item1, item2, relationshipType).pipe(
       take(1),
       hasValueOperator(),
-      mergeMap((relationship: Relationship) => this.relationshipService.deleteRelationship(relationship.id)),
+      mergeMap((relationship: Relationship) => this.relationshipService.deleteRelationship(relationship.id, 'none')),
       take(1)
     ).subscribe();
   }

src/app/shared/mocks/mock-submission.ts

@@ -1325,7 +1325,7 @@ export const mockUploadConfigResponse = {
     },
     self: 'https://rest.api/dspace-spring-rest/api/config/submissionforms/bitstream-metadata'
   },
-  required: false,
+  required: true,
   maxSize: 536870912,
   name: 'upload',
   type: 'submissionupload',
@@ -1336,6 +1336,10 @@ export const mockUploadConfigResponse = {
   self: 'https://rest.api/dspace-spring-rest/api/config/submissionuploads/upload'
 };
 
+// Clone the object and change one property
+export const mockUploadConfigResponseNotRequired = JSON.parse(JSON.stringify(mockUploadConfigResponse));
+mockUploadConfigResponseNotRequired.required = false;
+
 export const mockAccessConditionOptions = [
   {
     name: 'openaccess',

src/app/shared/object-collection/object-collection.component.html

@@ -5,6 +5,7 @@
                 [hideGear]="hideGear"
                 [linkType]="linkType"
                 [context]="context"
+                [hidePaginationDetail]="hidePaginationDetail"
                 (paginationChange)="onPaginationChange($event)"
                 (pageChange)="onPageChange($event)"
                 (pageSizeChange)="onPageSizeChange($event)"
@@ -14,6 +15,9 @@
                 (sortFieldChange)="onSortFieldChange($event)"
                 [selectable]="selectable"
                 [selectionConfig]="selectionConfig"
+                [importable]="importable"
+                [importConfig]="importConfig"
+                (importObject)="importObject.emit($event)"
                 *ngIf="(currentMode$ | async) === viewModeEnum.ListElement">
 </ds-object-list>
 
@@ -23,6 +27,7 @@
                 [hideGear]="hideGear"
                 [linkType]="linkType"
                 [context]="context"
+                [hidePaginationDetail]="hidePaginationDetail"
                 (paginationChange)="onPaginationChange($event)"
                 (pageChange)="onPageChange($event)"
                 (pageSizeChange)="onPageSizeChange($event)"
@@ -37,6 +42,7 @@
                   [hideGear]="hideGear"
                   [linkType]="linkType"
                   [context]="context"
+                  [hidePaginationDetail]="hidePaginationDetail"
                   *ngIf="(currentMode$ | async) === viewModeEnum.DetailedListElement">
 </ds-object-detail>
 

src/app/shared/object-collection/object-collection.component.ts

@@ -53,6 +53,21 @@ export class ObjectCollectionComponent implements OnInit {
   @Output() deselectObject: EventEmitter<ListableObject> = new EventEmitter<ListableObject>();
   @Output() selectObject: EventEmitter<ListableObject> = new EventEmitter<ListableObject>();
 
+  /**
+   * Whether or not to add an import button to the object elements
+   */
+  @Input() importable = false;
+
+  /**
+   * The config to use for the import button
+   */
+  @Input() importConfig: { buttonLabel: string };
+
+  /**
+   * Send an import event to the parent component
+   */
+  @Output() importObject: EventEmitter<ListableObject> = new EventEmitter<ListableObject>();
+
   /**
    * The link type of the rendered list elements
    */
@@ -63,6 +78,11 @@ export class ObjectCollectionComponent implements OnInit {
    */
   @Input() context: Context;
 
+  /**
+   * Option for hiding the pagination detail
+   */
+  @Input() hidePaginationDetail = false;
+
   /**
    * the page info of the list
    */

src/app/shared/object-collection/shared/importable-list-item-control/importable-list-item-control.component.html

@@ -0,0 +1,7 @@
+<div class="d-inline-block mr-2">
+  <button (click)="importObject.emit(object)"
+          class="btn btn-outline-primary btn-sm float-left"
+          title="{{importConfig?.buttonLabel | translate}}">
+    <i class="fas fa-cloud-download-alt fa-fw"></i>
+  </button>
+</div>

src/app/shared/object-collection/shared/importable-list-item-control/importable-list-item-control.component.ts

@@ -0,0 +1,26 @@
+import { Component, EventEmitter, Input, Output } from '@angular/core';
+import { ListableObject } from '../listable-object.model';
+
+@Component({
+  selector: 'ds-importable-list-item-control',
+  templateUrl: './importable-list-item-control.component.html'
+})
+/**
+ * Component adding an import button to a list item
+ */
+export class ImportableListItemControlComponent {
+  /**
+   * The item or metadata to determine the component for
+   */
+  @Input() object: ListableObject;
+
+  /**
+   * Extra configuration for the import button
+   */
+  @Input() importConfig: { buttonLabel: string };
+
+  /**
+   * Output the object to import
+   */
+  @Output() importObject: EventEmitter<ListableObject> = new EventEmitter<ListableObject>();
+}

src/app/shared/object-detail/object-detail.component.ts

@@ -89,7 +89,7 @@ export class ObjectDetailComponent {
   /**
    * Option for hiding the pagination detail
    */
-  public hidePaginationDetail = true;
+  @Input() hidePaginationDetail = true;
 
   /**
    * An event fired when the page is changed.

src/app/shared/object-grid/object-grid.component.html

@@ -5,6 +5,7 @@
   [sortOptions]="sortConfig"
   [hideGear]="hideGear"
   [hidePagerWhenSinglePage]="hidePagerWhenSinglePage"
+  [hidePaginationDetail]="hidePaginationDetail"
   (pageChange)="onPageChange($event)"
   (pageSizeChange)="onPageSizeChange($event)"
   (sortDirectionChange)="onSortDirectionChange($event)"

src/app/shared/object-grid/object-grid.component.ts

@@ -69,6 +69,11 @@ export class ObjectGridComponent implements OnInit {
    */
   @Input() context: Context;
 
+  /**
+   * Option for hiding the pagination detail
+   */
+  @Input() hidePaginationDetail = false;
+
   /**
    * Behavior subject to output the current listable objects
    */

src/app/shared/object-list/my-dspace-result-list-element/item-list-preview/item-list-preview.component.html

@@ -2,6 +2,7 @@
   <ng-container *ngIf="status">
     <ds-mydspace-item-status [status]="status"></ds-mydspace-item-status>
   </ng-container>
+  <ds-item-type-badge [object]="item"></ds-item-type-badge>
   <ds-truncatable [id]="item.id">
     <h3 [innerHTML]="item.firstMetadataValue('dc.title') || ('mydspace.results.no-title' | translate)" [ngClass]="{'lead': true,'text-muted': !item.firstMetadataValue('dc.title')}"></h3>
     <div>

src/app/shared/object-list/my-dspace-result-list-element/item-list-preview/item-list-preview.component.spec.ts

@@ -47,6 +47,23 @@ const mockItemWithoutAuthorAndDate: Item = Object.assign(new Item(), {
     ]
   }
 });
+const mockItemWithEntityType: Item = Object.assign(new Item(), {
+  bundles: observableOf({}),
+  metadata: {
+    'dc.title': [
+      {
+        language: 'en_US',
+        value: 'This is just another title'
+      }
+    ],
+    'relationship.type': [
+      {
+        language: null,
+        value: 'Publication'
+      }
+    ]
+  }
+});
 
 describe('ItemListPreviewComponent', () => {
   beforeEach(async(() => {
@@ -128,4 +145,16 @@ describe('ItemListPreviewComponent', () => {
       expect(dateField).not.toBeNull();
     });
   });
+
+  describe('When the item has an entity type', () => {
+    beforeEach(() => {
+      component.item = mockItemWithEntityType;
+      fixture.detectChanges();
+    });
+
+    it('should show the entity type span', () => {
+      const entityField = fixture.debugElement.query(By.css('ds-item-type-badge'));
+      expect(entityField).not.toBeNull();
+    });
+  });
 });

src/app/shared/object-list/object-list.component.html

@@ -5,6 +5,7 @@
         [sortOptions]="sortConfig"
         [hideGear]="hideGear"
         [hidePagerWhenSinglePage]="hidePagerWhenSinglePage"
+        [hidePaginationDetail]="hidePaginationDetail"
         (pageChange)="onPageChange($event)"
         (pageSizeChange)="onPageSizeChange($event)"
         (sortDirectionChange)="onSortDirectionChange($event)"
@@ -19,6 +20,11 @@
                                                     (deselectObject)="deselectObject.emit($event)"
                                                     (selectObject)="selectObject.emit($event)"></ds-selectable-list-item-control>
               </span>
+          <span *ngIf="importable">
+            <ds-importable-list-item-control  [object]="object"
+                                              [importConfig]="importConfig"
+                                              (importObject)="importObject.emit($event)"></ds-importable-list-item-control>
+          </span>
             <ds-listable-object-component-loader [object]="object" [viewMode]="viewMode" [index]="i" [context]="context" [linkType]="linkType"
                                                  [listID]="selectionConfig?.listId"></ds-listable-object-component-loader>
         </li>

src/app/shared/object-list/object-list.component.ts

@@ -61,6 +61,21 @@ export class ObjectListComponent {
    */
   @Input() context: Context;
 
+  /**
+   * Option for hiding the pagination detail
+   */
+  @Input() hidePaginationDetail = false;
+
+  /**
+   * Whether or not to add an import button to the object
+   */
+  @Input() importable = false;
+
+  /**
+   * Config used for the import button
+   */
+  @Input() importConfig: { importLabel: string };
+
   /**
    * The current listable objects
    */
@@ -119,6 +134,12 @@ export class ObjectListComponent {
   @Output() deselectObject: EventEmitter<ListableObject> = new EventEmitter<ListableObject>();
 
   @Output() selectObject: EventEmitter<ListableObject> = new EventEmitter<ListableObject>();
+
+  /**
+   * Send an import event to the parent component
+   */
+  @Output() importObject: EventEmitter<ListableObject> = new EventEmitter<ListableObject>();
+
   /**
    * An event fired when the sort field is changed.
    * Event's payload equals to the newly selected sort field.

src/app/shared/pagination/pagination.component.html

@@ -1,5 +1,5 @@
 <div *ngIf="currentPageState == undefined || currentPageState == currentPage">
-  <div  class="pagination-masked clearfix top">
+  <div *ngIf="(!hidePaginationDetail && collectionSize > 0) || !hideGear" class="pagination-masked clearfix top">
     <div class="row">
       <div *ngIf="!hidePaginationDetail && collectionSize > 0" class="col-auto pagination-info">
           <span class="align-middle hidden-xs-down">{{ 'pagination.showing.label' | translate }}</span>

src/app/shared/search/search-results/search-results.component.html

@@ -8,6 +8,7 @@
             [selectable]="selectable"
             [selectionConfig]="selectionConfig"
             [context]="context"
+            [hidePaginationDetail]="hidePaginationDetail"
             (deselectObject)="deselectObject.emit($event)"
             (selectObject)="selectObject.emit($event)"
             >

src/app/shared/search/search-results/search-results.component.ts

@@ -67,6 +67,11 @@ export class SearchResultsComponent {
 
   @Input() context: Context;
 
+  /**
+   * Option for hiding the pagination detail
+   */
+  @Input() hidePaginationDetail = false;
+
   @Input() selectionConfig: {repeatable: boolean, listId: string};
 
   @Output() deselectObject: EventEmitter<ListableObject> = new EventEmitter<ListableObject>();

src/app/shared/shared.module.ts

@@ -47,7 +47,10 @@ import { LogOutComponent } from './log-out/log-out.component';
 import { FormComponent } from './form/form.component';
 import { DsDynamicTypeaheadComponent } from './form/builder/ds-dynamic-form-ui/models/typeahead/dynamic-typeahead.component';
 import { DsDynamicScrollableDropdownComponent } from './form/builder/ds-dynamic-form-ui/models/scrollable-dropdown/dynamic-scrollable-dropdown.component';
-import { DsDynamicFormControlContainerComponent, dsDynamicFormControlMapFn } from './form/builder/ds-dynamic-form-ui/ds-dynamic-form-control-container.component';
+import {
+  DsDynamicFormControlContainerComponent,
+  dsDynamicFormControlMapFn
+} from './form/builder/ds-dynamic-form-ui/ds-dynamic-form-control-container.component';
 import { DsDynamicFormComponent } from './form/builder/ds-dynamic-form-ui/ds-dynamic-form.component';
 import { DYNAMIC_FORM_CONTROL_MAP_FN, DynamicFormsCoreModule } from '@ng-dynamic-forms/core';
 import { DynamicFormsNGBootstrapUIModule } from '@ng-dynamic-forms/ui-ng-bootstrap';
@@ -172,6 +175,8 @@ import { SidebarFilterComponent } from './sidebar/filter/sidebar-filter.componen
 import { SidebarFilterSelectedOptionComponent } from './sidebar/filter/sidebar-filter-selected-option.component';
 import { SelectableListItemControlComponent } from './object-collection/shared/selectable-list-item-control/selectable-list-item-control.component';
 import { DsDynamicLookupRelationExternalSourceTabComponent } from './form/builder/ds-dynamic-form-ui/relation-lookup-modal/external-source-tab/dynamic-lookup-relation-external-source-tab.component';
+import { ExternalSourceEntryImportModalComponent } from './form/builder/ds-dynamic-form-ui/relation-lookup-modal/external-source-tab/external-source-entry-import-modal/external-source-entry-import-modal.component';
+import { ImportableListItemControlComponent } from './object-collection/shared/importable-list-item-control/importable-list-item-control.component';
 import { DragDropModule } from '@angular/cdk/drag-drop';
 import { ExistingMetadataListElementComponent } from './form/builder/ds-dynamic-form-ui/existing-metadata-list-element/existing-metadata-list-element.component';
 import { LogInContainerComponent } from './log-in/container/log-in-container.component';
@@ -338,11 +343,12 @@ const COMPONENTS = [
   CollectionSelectComponent,
   MetadataRepresentationLoaderComponent,
   SelectableListItemControlComponent,
+  ExternalSourceEntryImportModalComponent,
+  ImportableListItemControlComponent,
   ExistingMetadataListElementComponent,
   LogInShibbolethComponent,
   LogInPasswordComponent,
-  LogInContainerComponent,
-  ItemTypeBadgeComponent
+  LogInContainerComponent
 ];
 
 const ENTRY_COMPONENTS = [
@@ -405,6 +411,7 @@ const ENTRY_COMPONENTS = [
   DsDynamicLookupRelationSearchTabComponent,
   DsDynamicLookupRelationSelectionTabComponent,
   DsDynamicLookupRelationExternalSourceTabComponent,
+  ExternalSourceEntryImportModalComponent,
   LogInPasswordComponent,
   LogInShibbolethComponent
 ];

src/app/shared/trackable/abstract-trackable.component.ts

@@ -63,7 +63,7 @@ export class AbstractTrackableComponent {
    * Get translated notification title
    * @param key
    */
-  private getNotificationTitle(key: string) {
+  protected getNotificationTitle(key: string) {
     return this.translateService.instant(this.notificationsPrefix + key + '.title');
   }
 
@@ -71,7 +71,7 @@ export class AbstractTrackableComponent {
    * Get translated notification content
    * @param key
    */
-  private getNotificationContent(key: string) {
+  protected getNotificationContent(key: string) {
     return this.translateService.instant(this.notificationsPrefix + key + '.content');
 
   }

src/app/submission/sections/upload/section-upload.component.spec.ts

@@ -5,6 +5,7 @@ import { TranslateModule } from '@ngx-translate/core';
 import { of as observableOf } from 'rxjs';
 
 import { createSuccessfulRemoteDataObject$, createTestComponent } from '../../../shared/testing/utils';
+import { SubmissionObjectState } from '../../objects/submission-objects.reducer';
 import { SubmissionService } from '../../submission.service';
 import { SubmissionServiceStub } from '../../../shared/testing/submission-service-stub';
 import { SectionsService } from '../sections.service';
@@ -18,7 +19,7 @@ import {
   mockSubmissionId,
   mockSubmissionState,
   mockUploadConfigResponse,
-  mockUploadFiles
+  mockUploadConfigResponseNotRequired, mockUploadFiles,
 } from '../../../shared/mocks/mock-submission';
 import { BrowserModule } from '@angular/platform-browser';
 import { CommonModule } from '@angular/common';
@@ -31,7 +32,6 @@ import { cold, hot } from 'jasmine-marbles';
 import { Collection } from '../../../core/shared/collection.model';
 import { ResourcePolicy } from '../../../core/shared/resource-policy.model';
 import { ResourcePolicyService } from '../../../core/data/resource-policy.service';
-import { RemoteData } from '../../../core/data/remote-data';
 import { ConfigData } from '../../../core/config/config-data';
 import { PageInfo } from '../../../core/shared/page-info.model';
 import { Group } from '../../../core/eperson/models/group.model';
@@ -65,17 +65,7 @@ function getMockResourcePolicyService(): ResourcePolicyService {
   });
 }
 
-const sectionObject: SectionDataObject = {
-  config: 'https://dspace7.4science.it/or2018/api/config/submissionforms/upload',
-  mandatory: true,
-  data: {
-    files: []
-  },
-  errors: [],
-  header: 'submit.progressbar.describe.upload',
-  id: 'upload',
-  sectionType: SectionsType.Upload
-};
+let sectionObject: SectionDataObject;
 
 describe('SubmissionSectionUploadComponent test suite', () => {
 
@@ -90,10 +80,28 @@ describe('SubmissionSectionUploadComponent test suite', () => {
   let uploadsConfigService: any;
   let bitstreamService: any;
 
-  const submissionId = mockSubmissionId;
-  const collectionId = mockSubmissionCollectionId;
-  const submissionState = Object.assign({}, mockSubmissionState[mockSubmissionId]);
-  const mockCollection = Object.assign(new Collection(), {
+  let submissionId: string;
+  let collectionId: string;
+  let submissionState: SubmissionObjectState;
+  let mockCollection: Collection;
+  let mockDefaultAccessCondition: ResourcePolicy;
+
+  beforeEach(async(() => {
+    sectionObject = {
+      config: 'https://dspace7.4science.it/or2018/api/config/submissionforms/upload',
+      mandatory: true,
+      data: {
+        files: []
+      },
+      errors: [],
+      header: 'submit.progressbar.describe.upload',
+      id: 'upload',
+      sectionType: SectionsType.Upload
+    };
+    submissionId = mockSubmissionId;
+    collectionId = mockSubmissionCollectionId;
+    submissionState = Object.assign({}, mockSubmissionState[mockSubmissionId]) as any;
+    mockCollection = Object.assign(new Collection(), {
       name: 'Community 1-Collection 1',
       id: collectionId,
       metadata: [
@@ -106,14 +114,14 @@ describe('SubmissionSectionUploadComponent test suite', () => {
         defaultAccessConditions: collectionId + '/defaultAccessConditions'
       }
     });
-  const mockDefaultAccessCondition = Object.assign(new ResourcePolicy(), {
+
+    mockDefaultAccessCondition = Object.assign(new ResourcePolicy(), {
       name: null,
       groupUUID: '11cc35e5-a11d-4b64-b5b9-0052a5d15509',
       id: 20,
       uuid: 'resource-policy-20'
     });
 
-  beforeEach(async(() => {
     TestBed.configureTestingModule({
       imports: [
         BrowserModule,
@@ -215,6 +223,7 @@ describe('SubmissionSectionUploadComponent test suite', () => {
       expect(comp.collectionName).toBe(mockCollection.name);
       expect(comp.availableAccessConditionOptions.length).toBe(4);
       expect(comp.availableAccessConditionOptions).toEqual(mockUploadConfigResponse.accessConditionOptions as any);
+      expect(comp.required$.getValue()).toBe(true);
       expect(compAsAny.subs.length).toBe(2);
       expect(compAsAny.availableGroups.size).toBe(2);
       expect(compAsAny.availableGroups).toEqual(expectedGroupsMap);
@@ -254,6 +263,7 @@ describe('SubmissionSectionUploadComponent test suite', () => {
       expect(comp.collectionName).toBe(mockCollection.name);
       expect(comp.availableAccessConditionOptions.length).toBe(4);
       expect(comp.availableAccessConditionOptions).toEqual(mockUploadConfigResponse.accessConditionOptions as any);
+      expect(comp.required$.getValue()).toBe(true);
       expect(compAsAny.subs.length).toBe(2);
       expect(compAsAny.availableGroups.size).toBe(2);
       expect(compAsAny.availableGroups).toEqual(expectedGroupsMap);
@@ -263,17 +273,67 @@ describe('SubmissionSectionUploadComponent test suite', () => {
 
     });
 
-    it('should the properly section status', () => {
-      bitstreamService.getUploadedFileList.and.returnValue(hot('-a-b', {
+    it('should properly read the section status when required is true', () => {
+      submissionServiceStub.getSubmissionObject.and.returnValue(observableOf(submissionState));
+
+      collectionDataService.findById.and.returnValue(createSuccessfulRemoteDataObject$(mockCollection));
+
+      resourcePolicyService.findByHref.and.returnValue(createSuccessfulRemoteDataObject$(mockDefaultAccessCondition));
+
+      uploadsConfigService.getConfigByHref.and.returnValue(observableOf(
+        new ConfigData(new PageInfo(), mockUploadConfigResponse as any)
+      ));
+
+      groupService.findById.and.returnValues(
+        createSuccessfulRemoteDataObject$(Object.assign(new Group(), mockGroup)),
+        createSuccessfulRemoteDataObject$(Object.assign(new Group(), mockGroup))
+      );
+
+      bitstreamService.getUploadedFileList.and.returnValue(cold('-a-b', {
         a: [],
         b: mockUploadFiles
       }));
 
+      comp.onSectionInit();
+
+      expect(comp.required$.getValue()).toBe(true);
+
       expect(compAsAny.getSectionStatus()).toBeObservable(cold('-c-d', {
         c: false,
         d: true
       }));
     });
+
+    it('should properly read the section status when required is false', () => {
+      submissionServiceStub.getSubmissionObject.and.returnValue(observableOf(submissionState));
+
+      collectionDataService.findById.and.returnValue(createSuccessfulRemoteDataObject$(mockCollection));
+
+      resourcePolicyService.findByHref.and.returnValue(createSuccessfulRemoteDataObject$(mockDefaultAccessCondition));
+
+      uploadsConfigService.getConfigByHref.and.returnValue(observableOf(
+        new ConfigData(new PageInfo(), mockUploadConfigResponseNotRequired as any)
+      ));
+
+      groupService.findById.and.returnValues(
+        createSuccessfulRemoteDataObject$(Object.assign(new Group(), mockGroup)),
+        createSuccessfulRemoteDataObject$(Object.assign(new Group(), mockGroup))
+      );
+
+      bitstreamService.getUploadedFileList.and.returnValue(cold('-a-b', {
+        a: [],
+        b: mockUploadFiles
+      }));
+
+      comp.onSectionInit();
+
+      expect(comp.required$.getValue()).toBe(false);
+
+      expect(compAsAny.getSectionStatus()).toBeObservable(cold('-c-d', {
+        c: true,
+        d: true
+      }));
+    });
   });
 });
 

src/app/submission/sections/upload/section-upload.component.ts

@@ -1,6 +1,6 @@
 import { ChangeDetectorRef, Component, Inject } from '@angular/core';
 
-import { combineLatest, Observable, Subscription } from 'rxjs';
+import { BehaviorSubject, combineLatest as observableCombineLatest, Observable, Subscription} from 'rxjs';
 import { distinctUntilChanged, filter, find, flatMap, map, reduce, take, tap } from 'rxjs/operators';
 
 import { SectionModelComponent } from '../models/section.model';
@@ -104,6 +104,12 @@ export class SubmissionSectionUploadComponent extends SectionModelComponent {
    */
   protected availableGroups: Map<string, Group[]>; // Groups for any policy
 
+  /**
+   * Is the upload required
+   * @type {boolean}
+   */
+  public required$ = new BehaviorSubject<boolean>(true);
+
   /**
    * Array to track all subscriptions and unsubscribe them onDestroy
    * @type {Array}
@@ -172,6 +178,7 @@ export class SubmissionSectionUploadComponent extends SectionModelComponent {
         }),
         flatMap(() => config$),
         flatMap((config: SubmissionUploadsModel) => {
+          this.required$.next(config.required);
           this.availableAccessConditionOptions = isNotEmpty(config.accessConditionOptions) ? config.accessConditionOptions : [];
 
           this.collectionPolicyType = this.availableAccessConditionOptions.length > 0
@@ -221,7 +228,7 @@ export class SubmissionSectionUploadComponent extends SectionModelComponent {
       }),
 
       // retrieve submission's bitstreams from state
-      combineLatest(this.configMetadataForm$,
+      observableCombineLatest(this.configMetadataForm$,
         this.bitstreamService.getUploadedFileList(this.submissionId, this.sectionData.id)).pipe(
         filter(([configMetadataForm, fileList]: [SubmissionFormsModel, any[]]) => {
           return isNotEmpty(configMetadataForm) && isNotUndefined(fileList)
@@ -273,8 +280,13 @@ export class SubmissionSectionUploadComponent extends SectionModelComponent {
    *     the section status
    */
   protected getSectionStatus(): Observable<boolean> {
-    return this.bitstreamService.getUploadedFileList(this.submissionId, this.sectionData.id).pipe(
-      map((fileList: any[]) => (isNotUndefined(fileList) && fileList.length > 0)));
+    // if not mandatory, always true
+    // if mandatory, at least one file is required
+    return observableCombineLatest(this.required$,
+      this.bitstreamService.getUploadedFileList(this.submissionId, this.sectionData.id),
+      (required,fileList: any[]) => {
+        return (!required || (isNotUndefined(fileList) && fileList.length > 0));
+      });
   }
 
   /**

src/config/collection-page-config.interface.ts

@@ -0,0 +1,7 @@
+import { Config } from './config.interface';
+
+export interface CollectionPageConfig extends Config {
+  edit: {
+    undoTimeout: number;
+  }
+}

src/config/global-config.interface.ts

@@ -8,6 +8,7 @@ import { FormConfig } from './form-config.interfaces';
 import {LangConfig} from './lang-config.interface';
 import { BrowseByConfig } from './browse-by-config.interface';
 import { ItemPageConfig } from './item-page-config.interface';
+import { CollectionPageConfig } from './collection-page-config.interface';
 import { Theme } from './theme.inferface';
 import {AuthConfig} from './auth-config.interfaces';
 
@@ -28,5 +29,6 @@ export interface GlobalConfig extends Config {
   languages: LangConfig[];
   browseBy: BrowseByConfig;
   item: ItemPageConfig;
+  collection: CollectionPageConfig;
   themes: Theme[];
 }

themes/mantis/app/+item-page/simple/item-types/publication/publication.component.html

@@ -50,7 +50,10 @@ a<div class="top-item-page">
                                                     [fields]="['dc.identifier.citation']"
                                                     [label]="'item.page.citation'">
                         </ds-generic-item-page-field>
-                        <ds-item-page-uri-field [item]="object"></ds-item-page-uri-field>
+                        <<ds-item-page-uri-field [item]="object"
+                                                 [fields]="['dc.identifier.uri']"
+                                                 [label]="'item.page.uri'">
+                        </ds-item-page-uri-field>
                         <ds-item-page-collections [item]="object"></ds-item-page-collections>
                     </div>
                 </div>