diff --git a/src/app/+submit-page/submit-page-routing.module.ts b/src/app/+submit-page/submit-page-routing.module.ts
index c583db2cb6..7a123bfc31 100644
--- a/src/app/+submit-page/submit-page-routing.module.ts
+++ b/src/app/+submit-page/submit-page-routing.module.ts
@@ -17,4 +17,7 @@ import { SubmissionSubmitComponent } from '../submission/submit/submission-submi
     ])
   ]
 })
+/**
+ * This module defines the default component to load when navigating to the submit page path.
+ */
 export class SubmitPageRoutingModule { }
diff --git a/src/app/+submit-page/submit-page.module.ts b/src/app/+submit-page/submit-page.module.ts
index 6c791d3d77..e43d9d36aa 100644
--- a/src/app/+submit-page/submit-page.module.ts
+++ b/src/app/+submit-page/submit-page.module.ts
@@ -12,6 +12,9 @@ import { SubmissionModule } from '../submission/submission.module';
     SubmissionModule,
   ],
 })
+/**
+ * This module handles all modules that need to access the submit page.
+ */
 export class SubmitPageModule {
 
 }
diff --git a/src/app/+workflowitems-edit-page/workflowitems-edit-page-routing.module.ts b/src/app/+workflowitems-edit-page/workflowitems-edit-page-routing.module.ts
index 750f98435f..aa182eb291 100644
--- a/src/app/+workflowitems-edit-page/workflowitems-edit-page-routing.module.ts
+++ b/src/app/+workflowitems-edit-page/workflowitems-edit-page-routing.module.ts
@@ -17,4 +17,7 @@ import { SubmissionEditComponent } from '../submission/edit/submission-edit.comp
     ])
   ]
 })
+/**
+ * This module defines the default component to load when navigating to the workflowitems edit page path.
+ */
 export class WorkflowitemsEditPageRoutingModule { }
diff --git a/src/app/+workflowitems-edit-page/workflowitems-edit-page.module.ts b/src/app/+workflowitems-edit-page/workflowitems-edit-page.module.ts
index 936816f2c3..fbb53d8dcc 100644
--- a/src/app/+workflowitems-edit-page/workflowitems-edit-page.module.ts
+++ b/src/app/+workflowitems-edit-page/workflowitems-edit-page.module.ts
@@ -13,6 +13,9 @@ import { SubmissionModule } from '../submission/submission.module';
   ],
   declarations: []
 })
+/**
+ * This module handles all modules that need to access the workflowitems edit page.
+ */
 export class WorkflowitemsEditPageModule {
 
 }
diff --git a/src/app/+workspaceitems-edit-page/workspaceitems-edit-page-routing.module.ts b/src/app/+workspaceitems-edit-page/workspaceitems-edit-page-routing.module.ts
index 07d59dfdd3..d10c53e138 100644
--- a/src/app/+workspaceitems-edit-page/workspaceitems-edit-page-routing.module.ts
+++ b/src/app/+workspaceitems-edit-page/workspaceitems-edit-page-routing.module.ts
@@ -17,4 +17,7 @@ import { SubmissionEditComponent } from '../submission/edit/submission-edit.comp
     ])
   ]
 })
+/**
+ * This module defines the default component to load when navigating to the workspaceitems edit page path
+ */
 export class WorkspaceitemsEditPageRoutingModule { }
diff --git a/src/app/+workspaceitems-edit-page/workspaceitems-edit-page.module.ts b/src/app/+workspaceitems-edit-page/workspaceitems-edit-page.module.ts
index 611304f651..65a40f3f7c 100644
--- a/src/app/+workspaceitems-edit-page/workspaceitems-edit-page.module.ts
+++ b/src/app/+workspaceitems-edit-page/workspaceitems-edit-page.module.ts
@@ -13,6 +13,9 @@ import { SubmissionModule } from '../submission/submission.module';
   ],
   declarations: []
 })
+/**
+ * This module handles all modules that need to access the workspaceitems edit page.
+ */
 export class WorkspaceitemsEditPageModule {
 
 }
diff --git a/src/app/core/cache/models/normalized-license.model.ts b/src/app/core/cache/models/normalized-license.model.ts
index 84f1671766..1457394c9d 100644
--- a/src/app/core/cache/models/normalized-license.model.ts
+++ b/src/app/core/cache/models/normalized-license.model.ts
@@ -3,12 +3,15 @@ import { mapsTo } from '../builders/build-decorators';
 import { NormalizedDSpaceObject } from './normalized-dspace-object.model';
 import { License } from '../../shared/license.model';
 
+/**
+ * Normalized model class for a Collection License
+ */
 @mapsTo(License)
 @inheritSerialization(NormalizedDSpaceObject)
 export class NormalizedLicense extends NormalizedDSpaceObject {
 
   /**
-   * Is the license custom?
+   * A boolean representing if this License is custom or not
    */
   @autoserialize
   custom: boolean;
diff --git a/src/app/core/cache/models/normalized-object-factory.ts b/src/app/core/cache/models/normalized-object-factory.ts
index af980c518d..2f54bd45bf 100644
--- a/src/app/core/cache/models/normalized-object-factory.ts
+++ b/src/app/core/cache/models/normalized-object-factory.ts
@@ -13,7 +13,6 @@ import { NormalizedEPerson } from '../../eperson/models/normalized-eperson.model
 import { NormalizedGroup } from '../../eperson/models/normalized-group.model';
 import { NormalizedWorkflowItem } from '../../submission/models/normalized-workflowitem.model';
 import { NormalizedBitstreamFormat } from './normalized-bitstream-format.model';
-import { SubmissionResourceType } from '../../submission/submission-resource-type';
 import { SubmissionDefinitionsModel } from '../../config/models/config-submission-definitions.model';
 import { SubmissionFormsModel } from '../../config/models/config-submission-forms.model';
 import { SubmissionSectionModel } from '../../config/models/config-submission-section.model';
diff --git a/src/app/core/cache/models/search-param.model.ts b/src/app/core/cache/models/search-param.model.ts
index 77d5cb744a..a33bbee5e6 100644
--- a/src/app/core/cache/models/search-param.model.ts
+++ b/src/app/core/cache/models/search-param.model.ts
@@ -1,4 +1,7 @@
 
+/**
+ * Class representing a query parameter (query?fieldName=fieldValue) used in FindAllOptions object
+ */
 export class SearchParam {
   constructor(public fieldName: string, public fieldValue: any) {
 
diff --git a/src/app/core/config/models/config-access-condition-option.model.ts b/src/app/core/config/models/config-access-condition-option.model.ts
index 1f2e826af7..0c25d9aa0f 100644
--- a/src/app/core/config/models/config-access-condition-option.model.ts
+++ b/src/app/core/config/models/config-access-condition-option.model.ts
@@ -1,8 +1,35 @@
+/**
+ * Model class for an Access Condition
+ */
 export class AccessConditionOption {
+
+  /**
+   * The name for this Access Condition
+   */
   name: string;
+
+  /**
+   * The uuid of the Group this Access Condition applies to
+   */
   groupUUID: string;
+
+  /**
+   * A boolean representing if this Access Condition has a start date
+   */
   hasStartDate: boolean;
+
+  /**
+   * A boolean representing if this Access Condition has an end date
+   */
   hasEndDate: boolean;
+
+  /**
+   * Maximum value of the start date
+   */
   maxStartDate: string;
+
+  /**
+   * Maximum value of the end date
+   */
   maxEndDate: string;
 }
diff --git a/src/app/core/config/models/config-submission-uploads.model.ts b/src/app/core/config/models/config-submission-uploads.model.ts
index 1b2bd9ea38..0e5b15d388 100644
--- a/src/app/core/config/models/config-submission-uploads.model.ts
+++ b/src/app/core/config/models/config-submission-uploads.model.ts
@@ -3,12 +3,21 @@ import { ConfigObject } from './config.model';
 import { AccessConditionOption } from './config-access-condition-option.model';
 import {SubmissionFormsModel} from './config-submission-forms.model';
 
+/**
+ * Normalized model class for the configuration describing the submission upload section
+ */
 @inheritSerialization(ConfigObject)
 export class SubmissionUploadsModel extends ConfigObject {
 
+  /**
+   * A list of available bitstream access conditions
+   */
   @autoserialize
   accessConditionOptions: AccessConditionOption[];
 
+  /**
+   * An object representing the configuration describing the bistream metadata form
+   */
   @autoserializeAs(SubmissionFormsModel)
   metadata: SubmissionFormsModel;
 
diff --git a/src/app/core/config/submission-uploads-config.service.ts b/src/app/core/config/submission-uploads-config.service.ts
index 88b9de9182..245e1fab68 100644
--- a/src/app/core/config/submission-uploads-config.service.ts
+++ b/src/app/core/config/submission-uploads-config.service.ts
@@ -4,6 +4,9 @@ import { ResponseCacheService } from '../cache/response-cache.service';
 import { RequestService } from '../data/request.service';
 import { HALEndpointService } from '../shared/hal-endpoint.service';
 
+/**
+ * Provides methods to retrieve, from REST server, bitstream access conditions configurations applicable during the submission process.
+ */
 @Injectable()
 export class SubmissionUploadsConfigService extends ConfigService {
   protected linkPath = 'submissionuploads';
diff --git a/src/app/core/data/request.models.ts b/src/app/core/data/request.models.ts
index cb2950d0ec..7a2ea014f4 100644
--- a/src/app/core/data/request.models.ts
+++ b/src/app/core/data/request.models.ts
@@ -232,6 +232,9 @@ export class IntegrationRequest extends GetRequest {
   }
 }
 
+/**
+ * Class representing a submission HTTP GET request object
+ */
 export class SubmissionRequest extends GetRequest {
   constructor(uuid: string, href: string) {
     super(uuid, href);
@@ -242,6 +245,9 @@ export class SubmissionRequest extends GetRequest {
   }
 }
 
+/**
+ * Class representing a submission HTTP DELETE request object
+ */
 export class SubmissionDeleteRequest extends DeleteRequest {
   constructor(public uuid: string,
               public href: string) {
@@ -253,6 +259,9 @@ export class SubmissionDeleteRequest extends DeleteRequest {
   }
 }
 
+/**
+ * Class representing a submission HTTP PATCH request object
+ */
 export class SubmissionPatchRequest extends PatchRequest {
   constructor(public uuid: string,
               public href: string,
@@ -265,6 +274,9 @@ export class SubmissionPatchRequest extends PatchRequest {
   }
 }
 
+/**
+ * Class representing a submission HTTP POST request object
+ */
 export class SubmissionPostRequest extends PostRequest {
   constructor(public uuid: string,
               public href: string,
@@ -278,6 +290,9 @@ export class SubmissionPostRequest extends PostRequest {
   }
 }
 
+/**
+ * Class representing an eperson HTTP GET request object
+ */
 export class EpersonRequest extends GetRequest {
   constructor(uuid: string, href: string) {
     super(uuid, href);
diff --git a/src/app/core/eperson/eperson-response-parsing.service.ts b/src/app/core/eperson/eperson-response-parsing.service.ts
index 53d148084d..4af9da71a7 100644
--- a/src/app/core/eperson/eperson-response-parsing.service.ts
+++ b/src/app/core/eperson/eperson-response-parsing.service.ts
@@ -13,6 +13,9 @@ import { NormalizedObject } from '../cache/models/normalized-object.model';
 import { NormalizedObjectFactory } from '../cache/models/normalized-object-factory';
 import { ResourceType } from '../shared/resource-type';
 
+/**
+ * Provides method to parse response from eperson endpoint.
+ */
 @Injectable()
 export class EpersonResponseParsingService extends BaseResponseParsingService implements ResponseParsingService {
 
diff --git a/src/app/core/eperson/eperson.service.ts b/src/app/core/eperson/eperson.service.ts
index 2ad0686a22..777dc397ae 100644
--- a/src/app/core/eperson/eperson.service.ts
+++ b/src/app/core/eperson/eperson.service.ts
@@ -6,6 +6,9 @@ import { HALEndpointService } from '../shared/hal-endpoint.service';
 import { NormalizedObject } from '../cache/models/normalized-object.model';
 import { DataService } from '../data/data.service';
 
+/**
+ * An abstract class that provides methods to make HTTP request to eperson endpoint.
+ */
 export abstract class EpersonService<TNormalized extends NormalizedObject, TDomain> extends DataService<TNormalized, TDomain> {
   protected request: EpersonRequest;
   protected abstract responseCache: ResponseCacheService;
diff --git a/src/app/core/eperson/group-eperson.service.ts b/src/app/core/eperson/group-eperson.service.ts
index a7f24c1ab8..f26ef7d8b7 100644
--- a/src/app/core/eperson/group-eperson.service.ts
+++ b/src/app/core/eperson/group-eperson.service.ts
@@ -18,6 +18,9 @@ import { SearchParam } from '../cache/models/search-param.model';
 import { RemoteData } from '../data/remote-data';
 import { PaginatedList } from '../data/paginated-list';
 
+/**
+ * Provides methods to retrieve eperson group resources.
+ */
 @Injectable()
 export class GroupEpersonService extends EpersonService<NormalizedGroup, Group> {
   protected linkPath = 'groups';
@@ -35,6 +38,14 @@ export class GroupEpersonService extends EpersonService<NormalizedGroup, Group>
     super();
   }
 
+  /**
+   * Check if the current user is member of to the indicated group
+   *
+   * @param groupName
+   *    the group name
+   * @return boolean
+   *    true if user is member of the indicated group, false otherwise
+   */
   isMemberOf(groupName: string): Observable<boolean> {
     const searchHref = 'isMemberOf';
     const options = new FindAllOptions();
diff --git a/src/app/core/integration/models/authority.value.ts b/src/app/core/integration/models/authority.value.ts
index 3b5ddd68ab..6e48983e6a 100644
--- a/src/app/core/integration/models/authority.value.ts
+++ b/src/app/core/integration/models/authority.value.ts
@@ -3,31 +3,69 @@ import { isNotEmpty } from '../../../shared/empty.util';
 import { PLACEHOLDER_PARENT_METADATA } from '../../../shared/form/builder/ds-dynamic-form-ui/models/relation-group/dynamic-relation-group.model';
 import { OtherInformation } from '../../../shared/form/builder/models/form-field-metadata-value.model';
 
+/**
+ * Class representing an authority object
+ */
 export class AuthorityValue extends IntegrationModel {
 
+  /**
+   * The identifier of this authority
+   */
   id: string;
 
+  /**
+   * The display value of this authority
+   */
   display: string;
 
+  /**
+   * The value of this authority
+   */
   value: string;
 
+  /**
+   * An object containing additional information related to this authority
+   */
   otherInformation: OtherInformation;
 
+  /**
+   * The language code of this authority value
+   */
   language: string;
 
+  /**
+   * This method checks if authority has an identifier value
+   *
+   * @return boolean
+   */
   hasAuthority(): boolean {
     return isNotEmpty(this.id);
   }
 
+  /**
+   * This method checks if authority has a value
+   *
+   * @return boolean
+   */
   hasValue(): boolean {
     return isNotEmpty(this.value);
   }
 
+  /**
+   * This method checks if authority has related information object
+   *
+   * @return boolean
+   */
   hasOtherInformation(): boolean {
     return isNotEmpty(this.otherInformation);
   }
 
-  hasPlaceholder() {
+  /**
+   * This method checks if authority has a placeholder as value
+   *
+   * @return boolean
+   */
+  hasPlaceholder(): boolean {
     return this.hasValue() && this.value === PLACEHOLDER_PARENT_METADATA;
   }
 }
diff --git a/src/app/core/json-patch/builder/json-patch-operation-path-combiner.ts b/src/app/core/json-patch/builder/json-patch-operation-path-combiner.ts
index 1650f57d63..0ee798fbfc 100644
--- a/src/app/core/json-patch/builder/json-patch-operation-path-combiner.ts
+++ b/src/app/core/json-patch/builder/json-patch-operation-path-combiner.ts
@@ -1,16 +1,19 @@
-/**
- * Combines a variable number of strings representing parts
- * of a relative REST URL in to a single, absolute REST URL
- *
- */
 import { isNotUndefined } from '../../../shared/empty.util';
 
+/**
+ * Interface used to represent a JSON-PATCH path member
+ * in JsonPatchOperationsState
+ */
 export interface JsonPatchOperationPathObject {
   rootElement: string;
   subRootElement: string;
   path: string;
 }
 
+/**
+ * Combines a variable number of strings representing parts
+ * of a JSON-PATCH path
+ */
 export class JsonPatchOperationPathCombiner  {
   private _rootElement: string;
   private _subRootElement: string;
@@ -28,6 +31,15 @@ export class JsonPatchOperationPathCombiner  {
     return this._subRootElement;
   }
 
+  /**
+   * Combines the parts of this JsonPatchOperationPathCombiner in to a JSON-PATCH path member
+   *
+   * e.g.   new JsonPatchOperationPathCombiner('sections', 'basic').getPath(['dc.title', '0'])
+   * returns: sections/basic/dc.title/0
+   *
+   * @return {string}
+   *      The combined path
+   */
   public getPath(fragment?: string|string[]): JsonPatchOperationPathObject {
     if (isNotUndefined(fragment) && Array.isArray(fragment)) {
       fragment = fragment.join('/');
diff --git a/src/app/core/json-patch/builder/json-patch-operations-builder.ts b/src/app/core/json-patch/builder/json-patch-operations-builder.ts
index 2cacc870cd..af2ea3496c 100644
--- a/src/app/core/json-patch/builder/json-patch-operations-builder.ts
+++ b/src/app/core/json-patch/builder/json-patch-operations-builder.ts
@@ -13,12 +13,27 @@ import { AuthorityValue } from '../../integration/models/authority.value';
 import { FormFieldMetadataValueObject } from '../../../shared/form/builder/models/form-field-metadata-value.model';
 import { FormFieldLanguageValueObject } from '../../../shared/form/builder/models/form-field-language-value.model';
 
+/**
+ * Provides methods to dispatch JsonPatch Operations Actions
+ */
 @Injectable()
 export class JsonPatchOperationsBuilder {
 
   constructor(private store: Store<CoreState>) {
   }
 
+  /**
+   * Dispatches a new NewPatchAddOperationAction
+   *
+   * @param path
+   *    a JsonPatchOperationPathObject representing path
+   * @param value
+   *    The value to update the referenced path
+   * @param first
+   *    A boolean representing if the value to be added is the first of an array
+   * @param plain
+   *    A boolean representing if the value to be added is a plain text value
+   */
   add(path: JsonPatchOperationPathObject, value, first = false, plain = false) {
     this.store.dispatch(
       new NewPatchAddOperationAction(
@@ -27,6 +42,16 @@ export class JsonPatchOperationsBuilder {
         path.path, this.prepareValue(value, plain, first)));
   }
 
+  /**
+   * Dispatches a new NewPatchReplaceOperationAction
+   *
+   * @param path
+   *    a JsonPatchOperationPathObject representing path
+   * @param value
+   *    the value to update the referenced path
+   * @param plain
+   *    a boolean representing if the value to be added is a plain text value
+   */
   replace(path: JsonPatchOperationPathObject, value, plain = false) {
     this.store.dispatch(
       new NewPatchReplaceOperationAction(
@@ -36,6 +61,12 @@ export class JsonPatchOperationsBuilder {
         this.prepareValue(value, plain, false)));
   }
 
+  /**
+   * Dispatches a new NewPatchRemoveOperationAction
+   *
+   * @param path
+   *    a JsonPatchOperationPathObject representing path
+   */
   remove(path: JsonPatchOperationPathObject) {
     this.store.dispatch(
       new NewPatchRemoveOperationAction(
@@ -57,8 +88,6 @@ export class JsonPatchOperationsBuilder {
               operationValue.push(this.prepareObjectValue(entry));
             } else {
               operationValue.push(new FormFieldMetadataValueObject(entry));
-              // operationValue.push({value: entry});
-              // operationValue.push(entry);
             }
           });
         } else if (typeof value === 'object') {
@@ -83,7 +112,6 @@ export class JsonPatchOperationsBuilder {
       operationValue = new FormFieldMetadataValueObject(value.value, value.language);
     } else if (value.hasOwnProperty('value')) {
       operationValue = new FormFieldMetadataValueObject(value.value);
-      // operationValue = value;
     } else {
       Object.keys(value)
         .forEach((key) => {
@@ -93,7 +121,6 @@ export class JsonPatchOperationsBuilder {
             operationValue[key] = value[key];
           }
         });
-      // operationValue = {value: value};
     }
     return operationValue;
   }
diff --git a/src/app/core/json-patch/json-patch-operations.effects.ts b/src/app/core/json-patch/json-patch-operations.effects.ts
index d7f831f33c..3304db5b9e 100644
--- a/src/app/core/json-patch/json-patch-operations.effects.ts
+++ b/src/app/core/json-patch/json-patch-operations.effects.ts
@@ -8,9 +8,15 @@ import {
   JsonPatchOperationsActionTypes
 } from './json-patch-operations.actions';
 
+/**
+ * Provides effect methods for jsonPatch Operations actions
+ */
 @Injectable()
 export class JsonPatchOperationsEffects {
 
+  /**
+   * Dispatches a FlushPatchOperationsAction for every dispatched CommitPatchOperationsAction
+   */
   @Effect() commit$ = this.actions$.pipe(
     ofType(JsonPatchOperationsActionTypes.COMMIT_JSON_PATCH_OPERATIONS),
     map((action: CommitPatchOperationsAction) => {
diff --git a/src/app/core/json-patch/json-patch-operations.reducer.ts b/src/app/core/json-patch/json-patch-operations.reducer.ts
index 353a93c9b0..906d5e0331 100644
--- a/src/app/core/json-patch/json-patch-operations.reducer.ts
+++ b/src/app/core/json-patch/json-patch-operations.reducer.ts
@@ -15,15 +15,25 @@ import {
 } from './json-patch-operations.actions';
 import { JsonPatchOperationModel, JsonPatchOperationType } from './json-patch.model';
 
+/**
+ * An interface to represent JSON-PATCH Operation objects to execute
+ */
 export interface JsonPatchOperationObject {
   operation: JsonPatchOperationModel;
   timeAdded: number;
 }
 
+/**
+ * An interface to represent the body containing a list of JsonPatchOperationObject
+ */
 export interface JsonPatchOperationsEntry {
   body: JsonPatchOperationObject[];
 }
 
+/**
+ * Interface used to represent a JSON-PATCH path member
+ * in JsonPatchOperationsState
+ */
 export interface JsonPatchOperationsResourceEntry {
   children: { [resourceId: string]: JsonPatchOperationsEntry };
   transactionStartTime: number;
@@ -42,6 +52,16 @@ export interface JsonPatchOperationsState {
 
 const initialState: JsonPatchOperationsState = Object.create(null);
 
+/**
+ * The JSON-PATCH operations Reducer
+ *
+ * @param state
+ *    the current state
+ * @param action
+ *    the action to perform on the state
+ * @return JsonPatchOperationsState
+ *    the new state
+ */
 export function jsonPatchOperationsReducer(state = initialState, action: PatchOperationsActions): JsonPatchOperationsState {
   switch (action.type) {
 
diff --git a/src/app/core/json-patch/json-patch-operations.service.ts b/src/app/core/json-patch/json-patch-operations.service.ts
index bfd296b63e..a6b3ddc7e1 100644
--- a/src/app/core/json-patch/json-patch-operations.service.ts
+++ b/src/app/core/json-patch/json-patch-operations.service.ts
@@ -19,6 +19,9 @@ import {
 } from './json-patch-operations.actions';
 import { JsonPatchOperationModel } from './json-patch.model';
 
+/**
+ * An abstract class that provides methods to make JSON Patch requests.
+ */
 export abstract class JsonPatchOperationsService<ResponseDefinitionDomain, PatchRequestDefinition extends PatchRequest> {
   protected abstract responseCache: ResponseCacheService;
   protected abstract requestService: RequestService;
@@ -40,6 +43,18 @@ export abstract class JsonPatchOperationsService<ResponseDefinitionDomain, Patch
     return observableMerge(errorResponses, successResponses);
   }
 
+  /**
+   * Submit a new JSON Patch request with all operations stored in the state that are ready to be dispatched
+   *
+   * @param hrefObs
+   *    Observable of request href
+   * @param resourceType
+   *    The resource type value
+   * @param resourceId
+   *    The resource id value
+   * @return Observable<ResponseDefinitionDomain>
+   *    observable of response
+   */
   protected submitJsonPatchOperations(hrefObs: Observable<string>, resourceType: string, resourceId?: string): Observable<ResponseDefinitionDomain> {
     let startTransactionTime = null;
     const [patchRequest$, emptyRequest$] = partition((request: PatchRequestDefinition) => isNotEmpty(request.body))(hrefObs.pipe(
@@ -101,6 +116,18 @@ export abstract class JsonPatchOperationsService<ResponseDefinitionDomain, Patch
     );
   }
 
+  /**
+   * Return an instance for RestRequest class
+   *
+   * @param uuid
+   *    The request uuid
+   * @param href
+   *    The request href
+   * @param body
+   *    The request body
+   * @return Object<PatchRequestDefinition>
+   *    instance of PatchRequestDefinition
+   */
   protected getRequestInstance(uuid: string, href: string, body?: any): PatchRequestDefinition {
     return new this.patchRequestConstructor(uuid, href, body);
   }
@@ -109,8 +136,20 @@ export abstract class JsonPatchOperationsService<ResponseDefinitionDomain, Patch
     return isNotEmpty(resourceID) ? `${endpoint}/${resourceID}` : `${endpoint}`;
   }
 
-  public jsonPatchByResourceType(linkName: string, scopeId: string, resourceType: string): Observable<ResponseDefinitionDomain> {
-    const href$ = this.halService.getEndpoint(linkName).pipe(
+  /**
+   * Make a new JSON Patch request with all operations related to the specified resource type
+   *
+   * @param linkPath
+   *    The link path of the request
+   * @param scopeId
+   *    The scope id
+   * @param resourceType
+   *    The resource type value
+   * @return Observable<ResponseDefinitionDomain>
+   *    observable of response
+   */
+  public jsonPatchByResourceType(linkPath: string, scopeId: string, resourceType: string): Observable<ResponseDefinitionDomain> {
+    const href$ = this.halService.getEndpoint(linkPath).pipe(
       filter((href: string) => isNotEmpty(href)),
       distinctUntilChanged(),
       map((endpointURL: string) => this.getEndpointByIDHref(endpointURL, scopeId)));
@@ -118,8 +157,22 @@ export abstract class JsonPatchOperationsService<ResponseDefinitionDomain, Patch
     return this.submitJsonPatchOperations(href$, resourceType);
   }
 
-  public jsonPatchByResourceID(linkName: string, scopeId: string, resourceType: string, resourceId: string): Observable<ResponseDefinitionDomain> {
-    const hrefObs = this.halService.getEndpoint(linkName).pipe(
+  /**
+   * Make a new JSON Patch request with all operations related to the specified resource id
+   *
+   * @param linkPath
+   *    The link path of the request
+   * @param scopeId
+   *    The scope id
+   * @param resourceType
+   *    The resource type value
+   * @param resourceId
+   *    The resource id value
+   * @return Observable<ResponseDefinitionDomain>
+   *    observable of response
+   */
+  public jsonPatchByResourceID(linkPath: string, scopeId: string, resourceType: string, resourceId: string): Observable<ResponseDefinitionDomain> {
+    const hrefObs = this.halService.getEndpoint(linkPath).pipe(
       filter((href: string) => isNotEmpty(href)),
       distinctUntilChanged(),
       map((endpointURL: string) => this.getEndpointByIDHref(endpointURL, scopeId)));
diff --git a/src/app/core/json-patch/json-patch.model.ts b/src/app/core/json-patch/json-patch.model.ts
index c0553fde97..f855333fab 100644
--- a/src/app/core/json-patch/json-patch.model.ts
+++ b/src/app/core/json-patch/json-patch.model.ts
@@ -1,3 +1,6 @@
+/**
+ * Represents all JSON Patch operations type.
+ */
 export enum JsonPatchOperationType {
   test = 'test',
   remove = 'remove',
@@ -7,6 +10,9 @@ export enum JsonPatchOperationType {
   copy = 'copy',
 }
 
+/**
+ * Represents a JSON Patch operations.
+ */
 export class JsonPatchOperationModel {
   op: JsonPatchOperationType;
   path: string;
diff --git a/src/app/core/json-patch/selectors.ts b/src/app/core/json-patch/selectors.ts
index 547d4b82e8..a77afb7b7d 100644
--- a/src/app/core/json-patch/selectors.ts
+++ b/src/app/core/json-patch/selectors.ts
@@ -24,11 +24,29 @@ export function subStateSelector<T, V>(parentSelector: Selector<any, any>, subSt
   });
 }
 
+/**
+ * Return MemoizedSelector to select all jsonPatchOperations for a specified resource type, stored in the state
+ *
+ * @param resourceType
+ *    the resource type
+ * @return MemoizedSelector<CoreState, JsonPatchOperationsResourceEntry>
+ *     MemoizedSelector
+ */
 export function jsonPatchOperationsByResourceType(resourceType: string): MemoizedSelector<CoreState, JsonPatchOperationsResourceEntry> {
   return keySelector<CoreState, JsonPatchOperationsResourceEntry>(coreSelector,'json/patch', resourceType);
 }
 
-export function jsonPatchOperationsByResourcId(resourceType: string, resourceId: string): MemoizedSelector<CoreState, JsonPatchOperationsEntry> {
+/**
+ * Return MemoizedSelector to select all jsonPatchOperations for a specified resource id, stored in the state
+ *
+ * @param resourceType
+ *    the resource type
+ * @param resourceId
+ *    the resourceId type
+ * @return MemoizedSelector<CoreState, JsonPatchOperationsResourceEntry>
+ *     MemoizedSelector
+ */
+export function jsonPatchOperationsByResourceId(resourceType: string, resourceId: string): MemoizedSelector<CoreState, JsonPatchOperationsEntry> {
   const resourceTypeSelector  = jsonPatchOperationsByResourceType(resourceType);
   return subStateSelector<CoreState, JsonPatchOperationsEntry>(resourceTypeSelector, resourceId);
 }
diff --git a/src/app/core/shared/file.service.ts b/src/app/core/shared/file.service.ts
index 75dbcefda8..6dfdb2b647 100644
--- a/src/app/core/shared/file.service.ts
+++ b/src/app/core/shared/file.service.ts
@@ -6,12 +6,21 @@ import { RestRequestMethod } from '../data/request.models';
 import { saveAs } from 'file-saver';
 import { DSpaceRESTV2Response } from '../dspace-rest-v2/dspace-rest-v2-response.model';
 
+/**
+ * Provides utility methods to save files on the client-side.
+ */
 @Injectable()
 export class FileService {
   constructor(
     private restService: DSpaceRESTv2Service
   ) { }
 
+  /**
+   * Makes a HTTP Get request to download a file
+   *
+   * @param url
+   *    file url
+   */
   downloadFile(url: string) {
     const headers = new HttpHeaders();
     const options: HttpOptions = Object.create({headers, responseType: 'blob'});
@@ -24,12 +33,12 @@ export class FileService {
   /**
    * Derives file name from the http response
    * by looking inside content-disposition
-   * @param res http DSpaceRESTV2Response
+   * @param res
+   *    http DSpaceRESTV2Response
    */
   getFileNameFromResponseContentDisposition(res: DSpaceRESTV2Response) {
     const contentDisposition = res.headers.get('content-disposition') || '';
     const matches = /filename="([^;]+)"/ig.exec(contentDisposition) || [];
-    const fileName = (matches[1] || 'untitled').trim().replace(/\.[^/.]+$/, '');
-    return fileName;
+    return (matches[1] || 'untitled').trim().replace(/\.[^/.]+$/, '');
   };
 }
diff --git a/src/app/core/shared/submit-data-response-definition.model.ts b/src/app/core/shared/submit-data-response-definition.model.ts
index 72416253fb..beb2b320cf 100644
--- a/src/app/core/shared/submit-data-response-definition.model.ts
+++ b/src/app/core/shared/submit-data-response-definition.model.ts
@@ -1,5 +1,8 @@
 import { ConfigObject } from '../config/models/config.model';
 import { SubmissionObject } from '../submission/models/submission-object.model';
 
+/**
+ * Defines a type for submission request responses.
+ */
 export type SubmitDataResponseDefinitionObject
   = Array<SubmissionObject | ConfigObject | string>;
diff --git a/src/app/core/submission/submission-resource-type.ts b/src/app/core/submission/submission-resource-type.ts
index 6c5dd11d77..8718fc55d3 100644
--- a/src/app/core/submission/submission-resource-type.ts
+++ b/src/app/core/submission/submission-resource-type.ts
@@ -1,7 +1,3 @@
-/**
- * TODO replace with actual string enum after upgrade to TypeScript 2.4:
- * https://github.com/Microsoft/TypeScript/pull/15486
- */
 export enum SubmissionResourceType {
   Bundle = 'bundle',
   Bitstream = 'bitstream',