diff --git a/src/app/core/cache/models/normalized-external-source-entry.model.ts b/src/app/core/cache/models/normalized-external-source-entry.model.ts
index 02abbb32d8..e8e3c695c3 100644
--- a/src/app/core/cache/models/normalized-external-source-entry.model.ts
+++ b/src/app/core/cache/models/normalized-external-source-entry.model.ts
@@ -4,6 +4,9 @@ import { ExternalSourceEntry } from '../../shared/external-source-entry.model';
 import { mapsTo } from '../builders/build-decorators';
 import { MetadataMap, MetadataMapSerializer } from '../../shared/metadata.models';
 
+/**
+ * Normalized model class for an external source entry
+ */
 @mapsTo(ExternalSourceEntry)
 @inheritSerialization(NormalizedObject)
 export class NormalizedExternalSourceEntry extends NormalizedObject<ExternalSourceEntry> {
diff --git a/src/app/core/cache/models/normalized-external-source.model.ts b/src/app/core/cache/models/normalized-external-source.model.ts
index dbcaeaf0de..fd9a42fb72 100644
--- a/src/app/core/cache/models/normalized-external-source.model.ts
+++ b/src/app/core/cache/models/normalized-external-source.model.ts
@@ -3,6 +3,9 @@ import { NormalizedObject } from './normalized-object.model';
 import { ExternalSource } from '../../shared/external-source.model';
 import { mapsTo } from '../builders/build-decorators';
 
+/**
+ * Normalized model class for an external source
+ */
 @mapsTo(ExternalSource)
 @inheritSerialization(NormalizedObject)
 export class NormalizedExternalSource extends NormalizedObject<ExternalSource> {
diff --git a/src/app/core/data/external-source.service.ts b/src/app/core/data/external-source.service.ts
index 2ef1fa3d0e..c32c13a20f 100644
--- a/src/app/core/data/external-source.service.ts
+++ b/src/app/core/data/external-source.service.ts
@@ -21,6 +21,9 @@ import { PaginatedList } from './paginated-list';
 import { ExternalSourceEntry } from '../shared/external-source-entry.model';
 import { DefaultChangeAnalyzer } from './default-change-analyzer.service';
 
+/**
+ * A service handling all external source requests
+ */
 @Injectable()
 export class ExternalSourceService extends DataService<ExternalSource> {
   protected linkPath = 'externalsources';
@@ -38,6 +41,11 @@ export class ExternalSourceService extends DataService<ExternalSource> {
     super();
   }
 
+  /**
+   * Get the endpoint to browse external sources
+   * @param options
+   * @param linkPath
+   */
   getBrowseEndpoint(options: FindListOptions = {}, linkPath: string = this.linkPath): Observable<string> {
     return this.halService.getEndpoint(linkPath);
   }
diff --git a/src/app/core/data/relationship.service.ts b/src/app/core/data/relationship.service.ts
index 978eb3aa5f..4dfae732f4 100644
--- a/src/app/core/data/relationship.service.ts
+++ b/src/app/core/data/relationship.service.ts
@@ -288,24 +288,51 @@ export class RelationshipService extends DataService<Relationship> {
     );
   }
 
+  /**
+   * Set a name variant for item with ID "itemID" part of list with ID "listID"
+   * @param listID      ID of the list the item is a part of
+   * @param itemID      ID of the item
+   * @param nameVariant A name variant for the item
+   */
   public setNameVariant(listID: string, itemID: string, nameVariant: string) {
     this.appStore.dispatch(new SetNameVariantAction(listID, itemID, nameVariant));
   }
 
+  /**
+   * Get the name variant for item with ID "itemID" part of list with ID "listID"
+   * @param listID      ID of the list the item is a part of
+   * @param itemID      ID of the item
+   */
   public getNameVariant(listID: string, itemID: string): Observable<string> {
     return this.appStore.pipe(
       select(relationshipStateSelector(listID, itemID))
     );
   }
 
+  /**
+   * Remove the name variant for item with ID "itemID" part of list with ID "listID"
+   * @param listID      ID of the list the item is a part of
+   * @param itemID      ID of the item
+   */
   public removeNameVariant(listID: string, itemID: string) {
     this.appStore.dispatch(new RemoveNameVariantAction(listID, itemID));
   }
 
+  /**
+   * Get the name variants of all items part of list with ID "listID"
+   * @param listID    ID of the list the items are a part of
+   */
   public getNameVariantsByListID(listID: string) {
     return this.appStore.pipe(select(relationshipListStateSelector(listID)));
   }
 
+  /**
+   * Get the relationship between two items with a name variant for the item on the opposite side of the relationship-label
+   * @param item1             Related item
+   * @param item2             Other related item
+   * @param relationshipLabel The label describing the relationship between the two items
+   * @param nameVariant       The name variant to give the item on the opposite side of the relationship-label
+   */
   public updateNameVariant(item1: Item, item2: Item, relationshipLabel: string, nameVariant: string): Observable<RemoteData<Relationship>> {
     return this.getRelationshipByItemsAndLabel(item1, item2, relationshipLabel)
       .pipe(
diff --git a/src/app/core/services/route.service.ts b/src/app/core/services/route.service.ts
index 8bca76f7d2..762d546705 100644
--- a/src/app/core/services/route.service.ts
+++ b/src/app/core/services/route.service.ts
@@ -187,14 +187,27 @@ export class RouteService {
     );
   }
 
+  /**
+   * Add a parameter to the current route
+   * @param key   The parameter name
+   * @param value The parameter value
+   */
   public addParameter(key, value) {
     this.store.dispatch(new AddParameterAction(key, value));
   }
 
+  /**
+   * Set a parameter in the current route (overriding the previous value)
+   * @param key   The parameter name
+   * @param value The parameter value
+   */
   public setParameter(key, value) {
     this.store.dispatch(new SetParameterAction(key, value));
   }
 
+  /**
+   * Get the current query and route parameters and add them
+   */
   public setCurrentRouteInfo() {
     combineLatest(this.getRouteParams(), this.route.queryParams)
       .pipe(take(1))
diff --git a/src/app/core/utilities/equatable.ts b/src/app/core/utilities/equatable.ts
index 1029a295ba..ce327c5cc3 100644
--- a/src/app/core/utilities/equatable.ts
+++ b/src/app/core/utilities/equatable.ts
@@ -1,6 +1,12 @@
 import { getExcludedFromEqualsFor, getFieldsForEquals } from './equals.decorators';
 import { hasNoValue, hasValue } from '../../shared/empty.util';
 
+/**
+ * Compare two objects by comparing a given list of their properties
+ * @param object1   The first object
+ * @param object2   The second object
+ * @param fieldList A list of fields to compare the two objects by
+ */
 function equalsByFields(object1, object2, fieldList): boolean {
   const unequalProperty = fieldList.find((key) => {
     if (object1[key] === object2[key]) {
@@ -27,6 +33,9 @@ function equalsByFields(object1, object2, fieldList): boolean {
   return hasNoValue(unequalProperty);
 }
 
+/**
+ * An object with a defined equals method
+ */
 export abstract class EquatableObject<T> {
   equals(other: T): boolean {
     if (hasNoValue(other)) {
diff --git a/src/app/entity-groups/research-entities/submission/item-list-elements/external-source-entry/external-source-entry-list-submission-element.component.ts b/src/app/entity-groups/research-entities/submission/item-list-elements/external-source-entry/external-source-entry-list-submission-element.component.ts
index 673370cc2c..c0512b4995 100644
--- a/src/app/entity-groups/research-entities/submission/item-list-elements/external-source-entry/external-source-entry-list-submission-element.component.ts
+++ b/src/app/entity-groups/research-entities/submission/item-list-elements/external-source-entry/external-source-entry-list-submission-element.component.ts
@@ -13,6 +13,9 @@ import { MetadataValue } from '../../../../../core/shared/metadata.models';
   styleUrls: ['./external-source-entry-list-submission-element.component.scss'],
   templateUrl: './external-source-entry-list-submission-element.component.html'
 })
+/**
+ * The component for displaying a list element of an external source entry
+ */
 export class ExternalSourceEntryListSubmissionElementComponent extends AbstractListableElementComponent<ExternalSourceEntry> implements OnInit {
   /**
    * The metadata value for the object's uri
diff --git a/src/app/entity-groups/research-entities/submission/name-variant-modal/name-variant-modal.component.ts b/src/app/entity-groups/research-entities/submission/name-variant-modal/name-variant-modal.component.ts
index 34eab47b47..3b5d8077cc 100644
--- a/src/app/entity-groups/research-entities/submission/name-variant-modal/name-variant-modal.component.ts
+++ b/src/app/entity-groups/research-entities/submission/name-variant-modal/name-variant-modal.component.ts
@@ -6,7 +6,13 @@ import { NgbActiveModal } from '@ng-bootstrap/ng-bootstrap';
   templateUrl: './name-variant-modal.component.html',
   styleUrls: ['./name-variant-modal.component.scss']
 })
+/**
+ * The component for the modal to add a name variant to an item
+ */
 export class NameVariantModalComponent {
+  /**
+   * The name variant
+   */
   @Input() value: string;
 
   constructor(public modal: NgbActiveModal) {
diff --git a/src/app/shared/form/builder/ds-dynamic-form-ui/models/disabled/dynamic-disabled.component.ts b/src/app/shared/form/builder/ds-dynamic-form-ui/models/disabled/dynamic-disabled.component.ts
index 173509acf9..cb4db189e1 100644
--- a/src/app/shared/form/builder/ds-dynamic-form-ui/models/disabled/dynamic-disabled.component.ts
+++ b/src/app/shared/form/builder/ds-dynamic-form-ui/models/disabled/dynamic-disabled.component.ts
@@ -9,6 +9,9 @@ import { RelationshipTypeService } from '../../../../../../core/data/relationshi
   selector: 'ds-dynamic-disabled',
   templateUrl: './dynamic-disabled.component.html'
 })
+/**
+ * Component for displaying a form input with a disabled property
+ */
 export class DsDynamicDisabledComponent extends DynamicFormControlComponent {
 
   @Input() formId: string;
diff --git a/src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/dynamic-lookup-relation-modal.component.ts b/src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/dynamic-lookup-relation-modal.component.ts
index 39f3e12bb9..c03d025530 100644
--- a/src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/dynamic-lookup-relation-modal.component.ts
+++ b/src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/dynamic-lookup-relation-modal.component.ts
@@ -41,16 +41,53 @@ import { ExternalSourceService } from '../../../../../core/data/external-source.
     }
   ]
 })
-
+/**
+ * Modal component for looking up relations
+ */
 export class DsDynamicLookupRelationModalComponent implements OnInit, OnDestroy {
+  /**
+   * The label to use to display i18n messages (describing the type of relationship)
+   */
   label: string;
+
+  /**
+   * Options for searching related items
+   */
   relationshipOptions: RelationshipOptions;
+
+  /**
+   * The ID of the list to add/remove selected items to/from
+   */
   listId: string;
+
+  /**
+   * The item we're adding relationships to
+   */
   item;
+
+  /**
+   * Is the selection repeatable?
+   */
   repeatable: boolean;
+
+  /**
+   * The list of selected items
+   */
   selection$: Observable<ListableObject[]>;
+
+  /**
+   * The context to display lists
+   */
   context: Context;
+
+  /**
+   * The metadata-fields describing these relationships
+   */
   metadataFields: string;
+
+  /**
+   * A map of subscriptions within this component
+   */
   subMap: {
     [uuid: string]: Subscription
   } = {};
@@ -104,6 +141,10 @@ export class DsDynamicLookupRelationModalComponent implements OnInit, OnDestroy
     this.modal.close();
   }
 
+  /**
+   * Select (a list of) objects and add them to the store
+   * @param selectableObjects
+   */
   select(...selectableObjects: Array<SearchResult<Item>>) {
     this.zone.runOutsideAngular(
       () => {
@@ -131,6 +172,10 @@ export class DsDynamicLookupRelationModalComponent implements OnInit, OnDestroy
       });
   }
 
+  /**
+   * Add a subscription updating relationships with name variants
+   * @param sri The search result to track name variants for
+   */
   private addNameVariantSubscription(sri: SearchResult<Item>) {
     const nameVariant$ = this.relationshipService.getNameVariant(this.listId, sri.indexableObject.uuid);
     this.subMap[sri.indexableObject.uuid] = nameVariant$.pipe(
@@ -138,6 +183,10 @@ export class DsDynamicLookupRelationModalComponent implements OnInit, OnDestroy
     ).subscribe((nameVariant: string) => this.store.dispatch(new UpdateRelationshipAction(this.item, sri.indexableObject, this.relationshipOptions.relationshipType, nameVariant)))
   }
 
+  /**
+   * Deselect (a list of) objects and remove them from the store
+   * @param selectableObjects
+   */
   deselect(...selectableObjects: Array<SearchResult<Item>>) {
     this.zone.runOutsideAngular(
       () => selectableObjects.forEach((object) => {
@@ -147,6 +196,9 @@ export class DsDynamicLookupRelationModalComponent implements OnInit, OnDestroy
     );
   }
 
+  /**
+   * Set existing name variants for items by the item's virtual metadata
+   */
   private setExistingNameVariants() {
     const virtualMDs: MetadataValue[] = this.item.allMetadata(this.metadataFields).filter((mdValue) => mdValue.isVirtual);
 
diff --git a/src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/external-source-tab/dynamic-lookup-relation-external-source-tab.component.ts b/src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/external-source-tab/dynamic-lookup-relation-external-source-tab.component.ts
index a8332dd3a1..d1fa538de3 100644
--- a/src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/external-source-tab/dynamic-lookup-relation-external-source-tab.component.ts
+++ b/src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/external-source-tab/dynamic-lookup-relation-external-source-tab.component.ts
@@ -30,15 +30,43 @@ import { PaginationComponentOptions } from '../../../../../pagination/pagination
     fadeInOut
   ]
 })
-
+/**
+ * The tab displaying a list of importable entries for an external source
+ */
 export class DsDynamicLookupRelationExternalSourceTabComponent implements OnInit {
+  /**
+   * The label to use to display i18n messages (describing the type of relationship)
+   */
   @Input() label: string;
+
+  /**
+   * The ID of the list to add/remove selected items to/from
+   */
   @Input() listId: string;
+
+  /**
+   * Is the selection repeatable?
+   */
   @Input() repeatable: boolean;
+
+  /**
+   * The context to display lists
+   */
   @Input() context: Context;
+
+  /**
+   * Send an event to deselect an object from the list
+   */
   @Output() deselectObject: 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
+   */
   initialPagination = Object.assign(new PaginationComponentOptions(), {
     id: 'submission-external-source-relation-list',
     pageSize: 5
diff --git a/src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/search-tab/dynamic-lookup-relation-search-tab.component.ts b/src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/search-tab/dynamic-lookup-relation-search-tab.component.ts
index fb2884cb37..1c4a8793b1 100644
--- a/src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/search-tab/dynamic-lookup-relation-search-tab.component.ts
+++ b/src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/search-tab/dynamic-lookup-relation-search-tab.component.ts
@@ -33,25 +33,81 @@ import { LookupRelationService } from '../../../../../../core/data/lookup-relati
     }
   ]
 })
-
+/**
+ * Tab for browsing local entities to add to the selection
+ */
 export class DsDynamicLookupRelationSearchTabComponent implements OnInit, OnDestroy {
+  /**
+   * Options for searching related items
+   */
   @Input() relationship: RelationshipOptions;
+
+  /**
+   * The ID of the list to add/remove selected items to/from
+   */
   @Input() listId: string;
+
+  /**
+   * Is the selection repeatable?
+   */
   @Input() repeatable: boolean;
+
+  /**
+   * The list of selected items
+   */
   @Input() selection$: Observable<ListableObject[]>;
+
+  /**
+   * The context to display lists
+   */
   @Input() context: Context;
 
+  /**
+   * Send an event to deselect an object from the list
+   */
   @Output() deselectObject: EventEmitter<ListableObject> = new EventEmitter<ListableObject>();
+
+  /**
+   * Send an event to select an object from the list
+   */
   @Output() selectObject: EventEmitter<ListableObject> = new EventEmitter<ListableObject>();
+
+  /**
+   * Search results
+   */
   resultsRD$: Observable<RemoteData<PaginatedList<SearchResult<Item>>>>;
+
+  /**
+   * Are all results selected?
+   */
   allSelected: boolean;
+
+  /**
+   * Are some results selected?
+   */
   someSelected$: Observable<boolean>;
+
+  /**
+   * Is it currently loading to select all results?
+   */
   selectAllLoading: boolean;
+
+  /**
+   * Subscription to unsubscribe from
+   */
   subscription;
+
+  /**
+   * The initial pagination to use
+   */
   initialPagination = Object.assign(new PaginationComponentOptions(), {
     id: 'submission-relation-list',
     pageSize: 5
   });
+
+  /**
+   * The type of links to display
+   */
   linkTypes = CollectionElementLinkType;
 
   constructor(
@@ -76,12 +132,19 @@ export class DsDynamicLookupRelationSearchTabComponent implements OnInit, OnDest
     );
   }
 
+  /**
+   * Reset the route parameters
+   */
   resetRoute() {
     this.router.navigate([], {
       queryParams: Object.assign({}, { pageSize: this.initialPagination.pageSize }, this.route.snapshot.queryParams, { page: 1 })
     });
   }
 
+  /**
+   * Select all results within the page provided
+   * @param page
+   */
   selectPage(page: Array<SearchResult<Item>>) {
     this.selection$
       .pipe(take(1))
@@ -92,6 +155,10 @@ export class DsDynamicLookupRelationSearchTabComponent implements OnInit, OnDest
     this.selectableListService.select(this.listId, page);
   }
 
+  /**
+   * Deselect all results within the page provided
+   * @param page
+   */
   deselectPage(page: Array<SearchResult<Item>>) {
     this.allSelected = false;
     this.selection$
@@ -103,6 +170,9 @@ export class DsDynamicLookupRelationSearchTabComponent implements OnInit, OnDest
     this.selectableListService.deselect(this.listId, page);
   }
 
+  /**
+   * Select all results
+   */
   selectAll() {
     this.allSelected = true;
     this.selectAllLoading = true;
@@ -128,6 +198,9 @@ export class DsDynamicLookupRelationSearchTabComponent implements OnInit, OnDest
     );
   }
 
+  /**
+   * Deselect all
+   */
   deselectAll() {
     this.allSelected = false;
     this.selection$
diff --git a/src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/selection-tab/dynamic-lookup-relation-selection-tab.component.ts b/src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/selection-tab/dynamic-lookup-relation-selection-tab.component.ts
index 3dcde9ea8e..076887b01e 100644
--- a/src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/selection-tab/dynamic-lookup-relation-selection-tab.component.ts
+++ b/src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/selection-tab/dynamic-lookup-relation-selection-tab.component.ts
@@ -24,15 +24,48 @@ import { Context } from '../../../../../../core/shared/context.model';
     }
   ]
 })
-
+/**
+ * Tab displaying the currently selected relations to add
+ */
 export class DsDynamicLookupRelationSelectionTabComponent {
+  /**
+   * The label to use to display i18n messages (describing the type of relationship)
+   */
   @Input() label: string;
+
+  /**
+   * The ID of the list to add/remove selected items to/from
+   */
   @Input() listId: string;
+
+  /**
+   * Is the selection repeatable?
+   */
   @Input() repeatable: boolean;
+
+  /**
+   * The list of selected items
+   */
   @Input() selection$: Observable<ListableObject[]>;
+
+  /**
+   * The paginated list of selected items
+   */
   @Input() selectionRD$: Observable<RemoteData<PaginatedList<ListableObject>>>;
+
+  /**
+   * The context to display lists
+   */
   @Input() context: Context;
+
+  /**
+   * Send an event to deselect an object from the list
+   */
   @Output() deselectObject: EventEmitter<ListableObject> = new EventEmitter<ListableObject>();
+
+  /**
+   * Send an event to select an object from the list
+   */
   @Output() selectObject: EventEmitter<ListableObject> = new EventEmitter<ListableObject>();
 
   constructor(private router: Router,
diff --git a/src/app/shared/form/builder/models/relationship-options.model.ts b/src/app/shared/form/builder/models/relationship-options.model.ts
index 7d9542794b..57c6cbca2c 100644
--- a/src/app/shared/form/builder/models/relationship-options.model.ts
+++ b/src/app/shared/form/builder/models/relationship-options.model.ts
@@ -1,5 +1,8 @@
 const RELATION_METADATA_PREFIX = 'relation.'
 
+/**
+ * Extra options for displaying search results of relationships
+ */
 export class RelationshipOptions {
   relationshipType: string;
   filter: string;