diff --git a/src/app/+search-page/search-filters/search-filter/search-facet-filter-options/search-facet-option/search-facet-option.component.ts b/src/app/+search-page/search-filters/search-filter/search-facet-filter-options/search-facet-option/search-facet-option.component.ts
index 9fa59a0c1e..7a6a51e99d 100644
--- a/src/app/+search-page/search-filters/search-filter/search-facet-filter-options/search-facet-option/search-facet-option.component.ts
+++ b/src/app/+search-page/search-filters/search-filter/search-facet-filter-options/search-facet-option/search-facet-option.component.ts
@@ -22,12 +22,30 @@ export class SearchFacetOptionComponent implements OnInit, OnDestroy {
    * A single value for this component
    */
   @Input() filterValue: FacetValue;
+
+  /**
+   * The filter configuration for this facet option
+   */
   @Input() filterConfig: SearchFilterConfig;
+
+  /**
+   * Emits the active values for this filter
+   */
   @Input() selectedValues$: Observable<string[]>;
 
+  /**
+   * Emits true when this option should be visible and false when it should be invisible
+   */
   isVisible: Observable<boolean>;
 
+  /**
+   * UI parameters when this filter is added
+   */
   addQueryParams;
+
+  /**
+   * Subscription to unsubscribe from on destroy
+   */
   sub: Subscription;
 
   constructor(protected searchService: SearchService,
@@ -64,7 +82,7 @@ export class SearchFacetOptionComponent implements OnInit, OnDestroy {
 
   /**
    * Calculates the parameters that should change if a given value for this filter would be added to the active filters
-   * @param {string} value The value that is added for this filter
+   * @param {string[]} selectedValues The values that are currently selected for this filter
    */
   private updateAddParams(selectedValues: string[]): void {
     this.addQueryParams = {
@@ -73,6 +91,9 @@ export class SearchFacetOptionComponent implements OnInit, OnDestroy {
     };
   }
 
+  /**
+   * Make sure the subscription is unsubscribed from when this component is destroyed
+   */
   ngOnDestroy(): void {
     if (hasValue(this.sub)) {
       this.sub.unsubscribe();
diff --git a/src/app/+search-page/search-filters/search-filter/search-facet-filter-options/search-facet-range-option/search-facet-range-option.component.ts b/src/app/+search-page/search-filters/search-filter/search-facet-filter-options/search-facet-range-option/search-facet-range-option.component.ts
index 2f6a49f8b9..22e6f04d9a 100644
--- a/src/app/+search-page/search-filters/search-filter/search-facet-filter-options/search-facet-range-option/search-facet-range-option.component.ts
+++ b/src/app/+search-page/search-filters/search-filter/search-facet-filter-options/search-facet-range-option/search-facet-range-option.component.ts
@@ -21,18 +21,32 @@ const rangeDelimiter = '-';
 })
 
 /**
- * Represents a single option in a filter facet
+ * Represents a single option in a range filter facet
  */
 export class SearchFacetRangeOptionComponent implements OnInit, OnDestroy {
   /**
    * A single value for this component
    */
   @Input() filterValue: FacetValue;
+
+  /**
+   * The filter configuration for this facet option
+   */
   @Input() filterConfig: SearchFilterConfig;
 
+  /**
+   * Emits true when this option should be visible and false when it should be invisible
+   */
   isVisible: Observable<boolean>;
 
+  /**
+   * UI parameters when this filter is changed
+   */
   changeQueryParams;
+
+  /**
+   * Subscription to unsubscribe from on destroy
+   */
   sub: Subscription;
 
   constructor(protected searchService: SearchService,
@@ -68,7 +82,6 @@ export class SearchFacetRangeOptionComponent implements OnInit, OnDestroy {
 
   /**
    * Calculates the parameters that should change if a given values for this range filter would be changed
-   * @param {string} value The values that are changed for this filter
    */
   updateChangeParams(): void {
     const parts = this.filterValue.value.split(rangeDelimiter);
@@ -81,6 +94,9 @@ export class SearchFacetRangeOptionComponent implements OnInit, OnDestroy {
     };
   }
 
+  /**
+   * Make sure the subscription is unsubscribed from when this component is destroyed
+   */
   ngOnDestroy(): void {
     if (hasValue(this.sub)) {
       this.sub.unsubscribe();
diff --git a/src/app/+search-page/search-filters/search-filter/search-facet-filter-options/search-facet-selected-option/search-facet-selected-option.component.ts b/src/app/+search-page/search-filters/search-filter/search-facet-filter-options/search-facet-selected-option/search-facet-selected-option.component.ts
index 55030a4a84..2eb17681df 100644
--- a/src/app/+search-page/search-filters/search-filter/search-facet-filter-options/search-facet-selected-option/search-facet-selected-option.component.ts
+++ b/src/app/+search-page/search-filters/search-filter/search-facet-filter-options/search-facet-selected-option/search-facet-selected-option.component.ts
@@ -21,13 +21,17 @@ import { SearchConfigurationService } from '../../../../search-service/search-co
 })
 
 /**
- * Represents a single option in a filter facet
+ * Represents a single selected option in a filter facet
  */
 export class SearchFacetSelectedOptionComponent implements OnInit, OnDestroy {
   /**
-   * A single value for this component
+   * The value for this component
    */
   @Input() selectedValue: string;
+
+  /**
+   * The filter configuration for this facet option
+   */
   @Input() filterConfig: SearchFilterConfig;
 
   /**
@@ -35,7 +39,14 @@ export class SearchFacetSelectedOptionComponent implements OnInit, OnDestroy {
    */
   @Input() selectedValues$: Observable<string[]>;
 
+  /**
+   * UI parameters when this filter is removed
+   */
   removeQueryParams;
+
+  /**
+   * Subscription to unsubscribe from on destroy
+   */
   sub: Subscription;
 
   constructor(protected searchService: SearchService,
@@ -64,8 +75,7 @@ export class SearchFacetSelectedOptionComponent implements OnInit, OnDestroy {
 
   /**
    * Calculates the parameters that should change if a given value for this filter would be removed from the active filters
-   * @param {string} value The value that is removed for this filter
-   * @returns {Observable<any>} The changed filter parameters
+   * @param {string[]} selectedValues The values that are currently selected for this filter
    */
   private updateRemoveParams(selectedValues: string[]): void {
     this.removeQueryParams = {
@@ -74,6 +84,9 @@ export class SearchFacetSelectedOptionComponent implements OnInit, OnDestroy {
     };
   }
 
+  /**
+   * Make sure the subscription is unsubscribed from when this component is destroyed
+   */
   ngOnDestroy(): void {
     if (hasValue(this.sub)) {
       this.sub.unsubscribe();
diff --git a/src/app/+search-page/search-filters/search-filter/search-facet-filter-wrapper/search-facet-filter-wrapper.component.ts b/src/app/+search-page/search-filters/search-filter/search-facet-filter-wrapper/search-facet-filter-wrapper.component.ts
index 5b733b52cb..6369a7691e 100644
--- a/src/app/+search-page/search-filters/search-filter/search-facet-filter-wrapper/search-facet-filter-wrapper.component.ts
+++ b/src/app/+search-page/search-filters/search-filter/search-facet-filter-wrapper/search-facet-filter-wrapper.component.ts
@@ -20,6 +20,9 @@ export class SearchFacetFilterWrapperComponent implements OnInit {
    */
   @Input() filterConfig: SearchFilterConfig;
 
+  /**
+   * The constructor of the search facet filter that should be rendered, based on the filter config's type
+   */
   searchFilter: GenericConstructor<SearchFacetFilterComponent>;
   /**
    * Injector to inject a child component with the @Input parameters
diff --git a/src/app/+search-page/search-filters/search-filter/search-facet-filter/search-facet-filter.component.ts b/src/app/+search-page/search-filters/search-filter/search-facet-filter/search-facet-filter.component.ts
index 62275ee3c4..367947a377 100644
--- a/src/app/+search-page/search-filters/search-filter/search-facet-filter/search-facet-filter.component.ts
+++ b/src/app/+search-page/search-filters/search-filter/search-facet-filter/search-facet-filter.component.ts
@@ -73,6 +73,10 @@ export class SearchFacetFilterComponent implements OnInit, OnDestroy {
    * State of the requested facets used to time the animation
    */
   animationState = 'loading';
+
+  /**
+   * Emits all current search options available in the search URL
+   */
   searchOptions$: Observable<SearchOptions>;
 
   constructor(protected searchService: SearchService,
@@ -207,6 +211,10 @@ export class SearchFacetFilterComponent implements OnInit, OnDestroy {
     )
   }
 
+  /**
+   * On click, set the input's value to the clicked data
+   * @param data The value of the option that was clicked
+   */
   onClick(data: any) {
     this.filter = data;
   }
diff --git a/src/app/+search-page/search-filters/search-filter/search-filter.actions.ts b/src/app/+search-page/search-filters/search-filter/search-filter.actions.ts
index 838597e03d..f7f80eefff 100644
--- a/src/app/+search-page/search-filters/search-filter/search-filter.actions.ts
+++ b/src/app/+search-page/search-filters/search-filter/search-filter.actions.ts
@@ -64,7 +64,7 @@ export class SearchFilterToggleAction extends SearchFilterAction {
 }
 
 /**
- * Used to set the initial state of a filter to collapsed
+ * Used to set the initial state of a filter
  */
 export class SearchFilterInitializeAction extends SearchFilterAction {
   type = SearchFilterActionTypes.INITIALIZE;
diff --git a/src/app/+search-page/search-filters/search-filter/search-filter.component.ts b/src/app/+search-page/search-filters/search-filter/search-filter.component.ts
index eaf318655f..3a5e4bfc55 100644
--- a/src/app/+search-page/search-filters/search-filter/search-filter.component.ts
+++ b/src/app/+search-page/search-filters/search-filter/search-filter.component.ts
@@ -28,9 +28,20 @@ export class SearchFilterComponent implements OnInit {
    * True when the filter is 100% collapsed in the UI
    */
   closed = true;
+
+  /**
+   * Emits true when the filter is currently collapsed in the store
+   */
   collapsed$: Observable<boolean>;
 
+  /**
+   * Emits all currently selected values for this filter
+   */
   selectedValues$: Observable<string[]>;
+
+  /**
+   * Emits true when the current filter is supposed to be shown
+   */
   active$: Observable<boolean>;
 
   constructor(private filterService: SearchFilterService, private searchService: SearchService, private searchConfigService: SearchConfigurationService) {
diff --git a/src/app/+search-page/search-filters/search-filter/search-range-filter/search-range-filter.component.ts b/src/app/+search-page/search-filters/search-filter/search-range-filter/search-range-filter.component.ts
index 0bc30676c1..ebdb797500 100644
--- a/src/app/+search-page/search-filters/search-filter/search-range-filter/search-range-filter.component.ts
+++ b/src/app/+search-page/search-filters/search-filter/search-range-filter/search-range-filter.component.ts
@@ -1,9 +1,4 @@
-import {
-  of as observableOf,
-  combineLatest as observableCombineLatest,
-  Observable,
-  Subscription
-} from 'rxjs';
+import { combineLatest as observableCombineLatest, Subscription } from 'rxjs';
 import { map, startWith } from 'rxjs/operators';
 import { isPlatformBrowser } from '@angular/common';
 import { Component, Inject, OnDestroy, OnInit, PLATFORM_ID } from '@angular/core';
@@ -23,15 +18,26 @@ import { RouteService } from '../../../../shared/services/route.service';
 import { hasValue } from '../../../../shared/empty.util';
 import { SearchConfigurationService } from '../../../search-service/search-configuration.service';
 
+/**
+ * The suffix for a range filters' minimum in the frontend URL
+ */
+export const RANGE_FILTER_MIN_SUFFIX = '.min';
+
+/**
+ * The suffix for a range filters' maximum in the frontend URL
+ */
+export const RANGE_FILTER_MAX_SUFFIX = '.max';
+
+/**
+ * The date formats that are possible to appear in a date filter
+ */
+const dateFormats = ['YYYY', 'YYYY-MM', 'YYYY-MM-DD'];
+
 /**
  * This component renders a simple item page.
  * The route parameter 'id' is used to request the item it represents.
  * All fields of the item that should be displayed, are defined in its template.
  */
-export const RANGE_FILTER_MIN_SUFFIX = '.min';
-export const RANGE_FILTER_MAX_SUFFIX = '.max';
-const dateFormats = ['YYYY', 'YYYY-MM', 'YYYY-MM-DD'];
-
 @Component({
   selector: 'ds-search-range-filter',
   styleUrls: ['./search-range-filter.component.scss'],
@@ -130,8 +136,4 @@ export class SearchRangeFilterComponent extends SearchFacetFilterComponent imple
       this.sub.unsubscribe();
     }
   }
-
-  out(call) {
-    console.log(call);
-  }
 }
diff --git a/src/app/core/cache/object-cache.service.ts b/src/app/core/cache/object-cache.service.ts
index 1fdc2eaaf8..483de65b98 100644
--- a/src/app/core/cache/object-cache.service.ts
+++ b/src/app/core/cache/object-cache.service.ts
@@ -22,11 +22,18 @@ import {
 import { CacheableObject, ObjectCacheEntry, ObjectCacheState } from './object-cache.reducer';
 import { AddToSSBAction } from './server-sync-buffer.actions';
 
+/**
+ * The base selector function to select the object cache in the store
+ */
 const objectCacheSelector = createSelector(
   coreSelector,
   (state: CoreState) => state['cache/object']
 );
 
+/**
+ * Selector function to select an object entry by self link from the cache
+ * @param selfLink The self link of the object
+ */
 const entryFromSelfLinkSelector =
   (selfLink: string): MemoizedSelector<CoreState, ObjectCacheEntry> => createSelector(
     objectCacheSelector,
diff --git a/src/app/core/core.selectors.ts b/src/app/core/core.selectors.ts
index 2ad701eba1..60365be7c2 100644
--- a/src/app/core/core.selectors.ts
+++ b/src/app/core/core.selectors.ts
@@ -1,4 +1,7 @@
 import { createFeatureSelector } from '@ngrx/store';
 import { CoreState } from './core.reducers';
 
+/**
+ * Base selector to select the core state from the store
+ */
 export const coreSelector = createFeatureSelector<CoreState>('core');
diff --git a/src/app/core/data/request.service.ts b/src/app/core/data/request.service.ts
index c85a0ff423..97bc4ea1a2 100644
--- a/src/app/core/data/request.service.ts
+++ b/src/app/core/data/request.service.ts
@@ -28,11 +28,18 @@ import { RestRequestMethod } from './rest-request-method';
 import { AddToIndexAction, RemoveFromIndexBySubstringAction } from '../index/index.actions';
 import { coreSelector } from '../core.selectors';
 
+/**
+ * The base selector function to select the request state in the store
+ */
 const requestCacheSelector = createSelector(
   coreSelector,
   (state: CoreState) => state['data/request']
 );
 
+/**
+ * Selector function to select a request entry by uuid from the cache
+ * @param uuid The uuid of the request
+ */
 const entryFromUUIDSelector = (uuid: string): MemoizedSelector<CoreState, RequestEntry> => createSelector(
   requestCacheSelector,
   (state: RequestState) => {
@@ -67,6 +74,9 @@ const getUuidsFromHrefSubstring = (state: IndexState, href: string): string[] =>
   return result;
 };
 
+/**
+ * A service to interact with the request state in the store
+ */
 @Injectable()
 export class RequestService {
   private requestsOnTheirWayToTheStore: string[] = [];
diff --git a/src/app/shared/services/route.service.ts b/src/app/shared/services/route.service.ts
index 6350605bce..3e62064d91 100644
--- a/src/app/shared/services/route.service.ts
+++ b/src/app/shared/services/route.service.ts
@@ -8,12 +8,19 @@ import {
 import { isNotEmpty } from '../empty.util';
 import { detect } from 'rxjs-spy';
 
+/**
+ * Service to keep track of the current query parameters
+ */
 @Injectable()
 export class RouteService {
 
   constructor(private route: ActivatedRoute) {
   }
 
+  /**
+   * Retrieves all query parameter values based on a parameter name
+   * @param paramName The name of the parameter to look for
+   */
   getQueryParameterValues(paramName: string): Observable<string[]> {
     return this.route.queryParamMap.pipe(
       map((params) => [...params.getAll(paramName)]),
@@ -21,6 +28,10 @@ export class RouteService {
     );
   }
 
+  /**
+   * Retrieves a single query parameter values based on a parameter name
+   * @param paramName The name of the parameter to look for
+   */
   getQueryParameterValue(paramName: string): Observable<string> {
     return this.route.queryParamMap.pipe(
       map((params) => params.get(paramName)),
@@ -28,6 +39,10 @@ export class RouteService {
     );
   }
 
+  /**
+   * Checks if the query parameter currently exists in the route
+   * @param paramName The name of the parameter to look for
+   */
   hasQueryParam(paramName: string): Observable<boolean> {
     return this.route.queryParamMap.pipe(
       map((params) => params.has(paramName)),
@@ -35,6 +50,11 @@ export class RouteService {
     );
   }
 
+  /**
+   * Checks if the query parameter with a specific value currently exists in the route
+   * @param paramName The name of the parameter to look for
+   * @param paramValue The value of the parameter to look for
+   */
   hasQueryParamWithValue(paramName: string, paramValue: string): Observable<boolean> {
     return this.route.queryParamMap.pipe(
       map((params) => params.getAll(paramName).indexOf(paramValue) > -1),
@@ -42,6 +62,10 @@ export class RouteService {
     );
   }
 
+  /**
+   * Retrieves all query parameters of which the parameter name starts with the given prefix
+   * @param prefix The prefix of the parameter name to look for
+   */
   getQueryParamsWithPrefix(prefix: string): Observable<Params> {
     return this.route.queryParamMap.pipe(
       map((qparams) => {