diff --git a/packages/api/src/datasets/index.integration.test.ts b/packages/api/src/datasets/index.integration.test.ts
index 58ff3be64..e8d5981f5 100644
--- a/packages/api/src/datasets/index.integration.test.ts
+++ b/packages/api/src/datasets/index.integration.test.ts
@@ -30,7 +30,7 @@ describe('search', () => {
     const result = await datasets.search();
 
     expect(result).toMatchObject({
-      totalCount: 14,
+      totalCount: 15,
     });
   });
 });
diff --git a/packages/api/src/datasets/searcher.integration.test.ts b/packages/api/src/datasets/searcher.integration.test.ts
index 0fc43ba11..ad00a2229 100644
--- a/packages/api/src/datasets/searcher.integration.test.ts
+++ b/packages/api/src/datasets/searcher.integration.test.ts
@@ -21,7 +21,7 @@ describe('search', () => {
     const result = await datasetSearcher.search();
 
     expect(result).toStrictEqual({
-      totalCount: 14,
+      totalCount: 15,
       offset: 0,
       limit: 10,
       sortBy: 'name',
@@ -687,6 +687,11 @@ describe('search', () => {
             id: 'The Museum',
             name: 'The Museum',
           },
+          {
+            totalCount: 1,
+            id: 'NIOD Institute for War, Holocaust and Genocide Studies',
+            name: 'NIOD Institute for War, Holocaust and Genocide Studies',
+          },
           {
             totalCount: 1,
             id: 'Research Organisation',
@@ -695,7 +700,7 @@ describe('search', () => {
         ],
         licenses: [
           {
-            totalCount: 6,
+            totalCount: 7,
             id: 'CC0 1.0 Universal (CC0 1.0) Public Domain Dedication',
             name: 'CC0 1.0 Universal (CC0 1.0) Public Domain Dedication',
           },
diff --git a/packages/api/src/definitions.ts b/packages/api/src/definitions.ts
index cc8153839..557dd35e6 100644
--- a/packages/api/src/definitions.ts
+++ b/packages/api/src/definitions.ts
@@ -76,6 +76,11 @@ export type HeritageObject = Thing & {
   isPartOf?: Dataset;
 };
 
+export type Event = {
+  id: string;
+  date?: TimeSpan;
+};
+
 export enum ProvenanceEventType {
   Acquisition = 'acquisition',
   TransferOfCustody = 'transferOfCustody',
diff --git a/packages/api/src/enrichments/searcher-constituents-wikidata.integration.test.ts b/packages/api/src/enrichments/searcher-constituents-wikidata.integration.test.ts
index 2acb06872..0e297bbdc 100644
--- a/packages/api/src/enrichments/searcher-constituents-wikidata.integration.test.ts
+++ b/packages/api/src/enrichments/searcher-constituents-wikidata.integration.test.ts
@@ -25,14 +25,14 @@ describe('search', () => {
           description: 'uitgeverij uit Utrecht',
         },
         {
-          id: 'http://www.wikidata.org/entity/Q105964347',
+          id: 'http://www.wikidata.org/entity/Q131287465',
           name: 'Rembrandt',
-          description: 'Metaalwarenfabriek Rembrandt BV',
+          description: 'fotograaf',
         },
         {
-          id: 'http://www.wikidata.org/entity/Q17330745',
-          name: 'Rembrandts vader',
-          description: 'Nederlands acteur',
+          id: 'http://www.wikidata.org/entity/Q375926',
+          name: 'Rembrandt Peale',
+          description: 'Amerikaans kunstschilder (1778-1860)',
         },
       ],
     });
@@ -48,9 +48,9 @@ describe('search', () => {
     expect(result).toStrictEqual({
       things: [
         {
-          id: 'http://www.wikidata.org/entity/Q352864',
-          name: 'Pieter Lastman',
-          description: 'Dutch painter',
+          id: 'http://www.wikidata.org/entity/Q29885090',
+          name: 'Neeltje Willemsdr. Zuytbrouck',
+          description: "Rembrandt's mother",
         },
         {
           id: 'http://www.wikidata.org/entity/Q105964347',
@@ -60,7 +60,7 @@ describe('search', () => {
         {
           id: 'http://www.wikidata.org/entity/Q1300641',
           name: 'Rembrandt Bugatti',
-          description: '1884-1916 Italian sculptor',
+          description: 'Italian sculptor (1884–1916)',
         },
       ],
     });
diff --git a/packages/api/src/objects/fetcher.ts b/packages/api/src/objects/fetcher.ts
index 4484f6cab..ea43d9b8a 100644
--- a/packages/api/src/objects/fetcher.ts
+++ b/packages/api/src/objects/fetcher.ts
@@ -173,6 +173,7 @@ export class HeritageObjectFetcher {
             FILTER(LANG(?typeName) = "${options.locale}")
           }
 
+          # For BC: data providers ought to use the same thesauri
           OPTIONAL {
             ?type rdfs:label ?typeName
             FILTER(LANG(?typeName) = "" || LANG(?typeName) = "${options.locale}")
@@ -215,6 +216,7 @@ export class HeritageObjectFetcher {
             FILTER(LANG(?materialName) = "${options.locale}")
           }
 
+          # For BC: data providers ought to use the same thesauri
           OPTIONAL {
             ?material rdfs:label ?materialName
             FILTER(LANG(?materialName) = "" || LANG(?materialName) = "${options.locale}")
diff --git a/packages/api/src/objects/searcher.integration.test.ts b/packages/api/src/objects/searcher.integration.test.ts
index 19b04cea0..db888f6da 100644
--- a/packages/api/src/objects/searcher.integration.test.ts
+++ b/packages/api/src/objects/searcher.integration.test.ts
@@ -108,6 +108,25 @@ describe('search', () => {
               name: 'Vincent van Gogh',
             },
           ]),
+          types: expect.arrayContaining([
+            {
+              id: expect.stringContaining(
+                'https://data.colonialcollections.nl/.well-known/genid/'
+              ),
+            },
+          ]),
+          materials: expect.arrayContaining([
+            {
+              id: expect.stringContaining(
+                'https://data.colonialcollections.nl/.well-known/genid/'
+              ),
+            },
+            {
+              id: expect.stringContaining(
+                'https://data.colonialcollections.nl/.well-known/genid/'
+              ),
+            },
+          ]),
           dateCreated: {
             id: expect.stringContaining(
               'https://data.colonialcollections.nl/.well-known/genid/'
diff --git a/packages/api/src/research-guides/definitions.ts b/packages/api/src/research-guides/definitions.ts
index f73a20608..7f7933632 100644
--- a/packages/api/src/research-guides/definitions.ts
+++ b/packages/api/src/research-guides/definitions.ts
@@ -1,12 +1,13 @@
-import {Place, Term, Thing} from '../definitions';
+import {Event, Place, Term, Thing} from '../definitions';
 
 export type Citation = Thing & {url?: string};
 
 export type ResearchGuide = Thing & {
-  identifier?: string;
+  alternateNames?: string[];
   abstract?: string;
   text?: string;
   encodingFormat?: string;
+  contentReferenceTimes?: Event[];
   contentLocations?: Place[];
   keywords?: Term[];
   citations?: Citation[];
diff --git a/packages/api/src/research-guides/fetcher.integration.test.ts b/packages/api/src/research-guides/fetcher.integration.test.ts
index 288cccf47..9413ee33e 100644
--- a/packages/api/src/research-guides/fetcher.integration.test.ts
+++ b/packages/api/src/research-guides/fetcher.integration.test.ts
@@ -17,96 +17,150 @@ describe('getTopLevels', () => {
     // The sorting order is undefined and can change - don't use toStrictEqual()
     expect(researchGuides).toMatchObject([
       {
-        id: 'https://guides.example.org/top-set',
+        id: 'https://guides.example.org/topset',
         name: 'Digital research guide',
         abstract:
           'Research aides for conducting provenance research into colonial collections',
         text: 'On this page you find various research aides that can assist...',
         encodingFormat: 'text/markdown',
-        seeAlso: expect.arrayContaining([
+        seeAlso: [
           {
-            id: 'https://guides.example.org/level-3-set',
-            identifier: '3',
-            seeAlso: expect.arrayContaining([
+            id: 'https://guides.example.org/subset3',
+            name: '3. Name',
+            seeAlso: [
               {
-                id: 'https://guides.example.org/level-3c',
-                name: 'Kunsthandel Van Lier',
+                id: 'https://guides.example.org/guide6',
+                name: 'Royal Cabinet of Curiosities',
                 seeAlso: [
                   {
-                    id: 'https://guides.example.org/level-2a',
-                    name: 'Military and navy',
+                    id: 'https://guides.example.org/guide5',
+                    name: 'Trade',
+                    seeAlso: [
+                      {
+                        id: 'https://guides.example.org/guide7',
+                        name: 'Kunsthandel Van Lier',
+                      },
+                    ],
                   },
                 ],
               },
               {
-                id: 'https://guides.example.org/level-3a',
-                name: 'Royal Cabinet of Curiosities',
+                id: 'https://guides.example.org/guide7',
+                name: 'Kunsthandel Van Lier',
                 seeAlso: [
                   {
-                    id: 'https://guides.example.org/level-2c',
-                    name: 'Trade',
+                    id: 'https://guides.example.org/guide4',
+                    name: 'Military and navy',
+                    seeAlso: [
+                      {
+                        id: 'https://guides.example.org/guide1',
+                        name: 'Doing research',
+                      },
+                      {
+                        id: 'https://guides.example.org/guide6',
+                        name: 'Royal Cabinet of Curiosities',
+                      },
+                    ],
                   },
                 ],
               },
-            ]),
+            ],
           },
           {
-            id: 'https://guides.example.org/level-2-set',
-            identifier: '2',
-            seeAlso: expect.arrayContaining([
+            id: 'https://guides.example.org/subset1',
+            name: '1. Name',
+            seeAlso: [
               {
-                id: 'https://guides.example.org/level-2c',
-                name: 'Trade',
+                id: 'https://guides.example.org/guide1',
+                name: 'Doing research',
                 seeAlso: [
                   {
-                    id: 'https://guides.example.org/level-3c',
-                    name: 'Kunsthandel Van Lier',
+                    id: 'https://guides.example.org/guide4',
+                    name: 'Military and navy',
+                    seeAlso: [
+                      {
+                        id: 'https://guides.example.org/guide1',
+                        name: 'Doing research',
+                      },
+                      {
+                        id: 'https://guides.example.org/guide6',
+                        name: 'Royal Cabinet of Curiosities',
+                      },
+                    ],
                   },
                 ],
               },
               {
-                id: 'https://guides.example.org/level-2a',
-                name: 'Military and navy',
+                id: 'https://guides.example.org/guide2',
+                name: 'How can I use the data hub for my research?',
+              },
+              {
+                id: 'https://guides.example.org/guide3',
+                name: 'Sources',
                 seeAlso: [
                   {
-                    id: 'https://guides.example.org/level-3a',
-                    name: 'Royal Cabinet of Curiosities',
+                    id: 'https://guides.example.org/guide5',
+                    name: 'Trade',
+                    seeAlso: [
+                      {
+                        id: 'https://guides.example.org/guide7',
+                        name: 'Kunsthandel Van Lier',
+                      },
+                    ],
                   },
                 ],
               },
-            ]),
+            ],
           },
           {
-            id: 'https://guides.example.org/level-1-set',
-            identifier: '1',
-            seeAlso: expect.arrayContaining([
+            id: 'https://guides.example.org/subset2',
+            name: '2. Name',
+            seeAlso: [
               {
-                id: 'https://guides.example.org/level-1b',
-                name: 'How can I use the data hub for my research?',
-              },
-              {
-                id: 'https://guides.example.org/level-1c',
-                name: 'Sources',
+                id: 'https://guides.example.org/guide4',
+                name: 'Military and navy',
                 seeAlso: [
                   {
-                    id: 'https://guides.example.org/level-2c',
-                    name: 'Trade',
+                    id: 'https://guides.example.org/guide1',
+                    name: 'Doing research',
+                    seeAlso: [
+                      {
+                        id: 'https://guides.example.org/guide4',
+                        name: 'Military and navy',
+                      },
+                    ],
+                  },
+                  {
+                    id: 'https://guides.example.org/guide6',
+                    name: 'Royal Cabinet of Curiosities',
+                    seeAlso: [
+                      {
+                        id: 'https://guides.example.org/guide5',
+                        name: 'Trade',
+                      },
+                    ],
                   },
                 ],
               },
               {
-                id: 'https://guides.example.org/level-1a',
-                name: 'Doing research',
+                id: 'https://guides.example.org/guide5',
+                name: 'Trade',
                 seeAlso: [
                   {
-                    id: 'https://guides.example.org/level-2a',
-                    name: 'Military and navy',
+                    id: 'https://guides.example.org/guide7',
+                    name: 'Kunsthandel Van Lier',
+                    seeAlso: [
+                      {
+                        id: 'https://guides.example.org/guide4',
+                        name: 'Military and navy',
+                      },
+                    ],
                   },
                 ],
               },
-            ]),
+            ],
           },
-        ]),
+        ],
       },
     ]);
   });
@@ -130,17 +184,17 @@ describe('getByIds', () => {
   it('returns the research guides that match the IDs', async () => {
     const researchGuides = await researchGuideFetcher.getByIds({
       ids: [
-        'https://guides.example.org/level-2a',
-        'https://guides.example.org/level-2c',
+        'https://guides.example.org/guide1',
+        'https://guides.example.org/guide4',
       ],
     });
 
     expect(researchGuides).toMatchObject([
       {
-        id: 'https://guides.example.org/level-2a',
+        id: 'https://guides.example.org/guide1',
       },
       {
-        id: 'https://guides.example.org/level-2c',
+        id: 'https://guides.example.org/guide4',
       },
     ]);
   });
@@ -165,23 +219,42 @@ describe('getById', () => {
 
   it('returns the research guide that matches the ID', async () => {
     const researchGuide = await researchGuideFetcher.getById({
-      id: 'https://guides.example.org/level-2a',
+      id: 'https://guides.example.org/guide4',
     });
 
     expect(researchGuide).toStrictEqual({
-      id: 'https://guides.example.org/level-2a',
+      id: 'https://guides.example.org/guide4',
       name: 'Military and navy',
+      alternateNames: ['Navy'],
       abstract:
         'Army and Navy personnel who operated in colonized territories collected objects in various ways during the colonial era.',
       text: 'Dutch authority in the [Dutch East Indies](https://www.geonames.org/1643084/republic-of-indonesia.html), [Suriname](https://www.geonames.org/3382998/republic-of-suriname.html) and on the [Caribbean Islands](https://www.geonames.org/8505032/netherlands-antilles.html) relied heavily on the use of the military...',
       encodingFormat: 'text/markdown',
+      contentReferenceTimes: expect.arrayContaining([
+        {
+          id: expect.stringContaining(
+            'https://data.colonialcollections.nl/.well-known/genid/'
+          ),
+          date: {
+            id: expect.stringContaining(
+              'https://data.colonialcollections.nl/.well-known/genid/'
+            ),
+            startDate: new Date('1924-01-01T00:00:00.000Z'),
+            endDate: new Date('1996-12-31T23:59:59.999Z'),
+          },
+        },
+      ]),
       seeAlso: expect.arrayContaining([
         {
-          id: 'https://guides.example.org/level-3a',
+          id: 'https://guides.example.org/guide6',
           name: 'Royal Cabinet of Curiosities',
         },
+        {
+          id: 'https://guides.example.org/guide1',
+          name: 'Doing research',
+        },
       ]),
-      contentLocations: [
+      contentLocations: expect.arrayContaining([
         {
           id: expect.stringContaining(
             'https://data.colonialcollections.nl/.well-known/genid/'
@@ -189,8 +262,8 @@ describe('getById', () => {
           name: 'Netherlands Antilles',
           sameAs: 'https://www.geonames.org/8505032/netherlands-antilles.html',
         },
-      ],
-      keywords: [
+      ]),
+      keywords: expect.arrayContaining([
         {
           id: expect.stringContaining(
             'https://data.colonialcollections.nl/.well-known/genid/'
@@ -198,8 +271,8 @@ describe('getById', () => {
           name: 'Midshipman',
           sameAs: 'https://www.wikidata.org/wiki/Q11141137',
         },
-      ],
-      citations: [
+      ]),
+      citations: expect.arrayContaining([
         {
           id: expect.stringContaining(
             'https://data.colonialcollections.nl/.well-known/genid/'
@@ -209,7 +282,7 @@ describe('getById', () => {
             'Via Delpher, the editions can be found by selecting the title',
           url: 'https://www.delpher.nl/',
         },
-      ],
+      ]),
     });
   });
 });
@@ -217,21 +290,26 @@ describe('getById', () => {
 describe('get with localized names', () => {
   it('returns a research guide with English names', async () => {
     const researchGuide = await researchGuideFetcher.getById({
-      id: 'https://guides.example.org/level-2a',
+      id: 'https://guides.example.org/guide4',
       locale: 'en',
     });
 
     expect(researchGuide).toMatchObject({
-      id: 'https://guides.example.org/level-2a',
+      id: 'https://guides.example.org/guide4',
       name: 'Military and navy',
+      alternateNames: expect.arrayContaining(['Navy']),
       abstract:
         'Army and Navy personnel who operated in colonized territories collected objects in various ways during the colonial era.',
       text: 'Dutch authority in the [Dutch East Indies](https://www.geonames.org/1643084/republic-of-indonesia.html), [Suriname](https://www.geonames.org/3382998/republic-of-suriname.html) and on the [Caribbean Islands](https://www.geonames.org/8505032/netherlands-antilles.html) relied heavily on the use of the military...',
       seeAlso: expect.arrayContaining([
         {
-          id: 'https://guides.example.org/level-3a',
+          id: 'https://guides.example.org/guide6',
           name: 'Royal Cabinet of Curiosities',
         },
+        {
+          id: 'https://guides.example.org/guide1',
+          name: 'Doing research',
+        },
       ]),
       contentLocations: [
         {
@@ -255,21 +333,26 @@ describe('get with localized names', () => {
 
   it('returns a research guide with Dutch names', async () => {
     const researchGuide = await researchGuideFetcher.getById({
-      id: 'https://guides.example.org/level-2a',
+      id: 'https://guides.example.org/guide4',
       locale: 'nl',
     });
 
     expect(researchGuide).toMatchObject({
-      id: 'https://guides.example.org/level-2a',
+      id: 'https://guides.example.org/guide4',
       name: 'Leger en Marine',
+      alternateNames: expect.arrayContaining(['Marine', 'Zeemacht']),
       abstract:
         'Leger- en marinepersoneel dat actief was in gekoloniseerde gebieden, verzamelde op verschillende manieren objecten tijdens het koloniale tijdperk.',
       text: 'Het Nederlandse gezag in [Nederlands-Indië](https://www.geonames.org/1643084/republic-of-indonesia.html), [Suriname](https://www.geonames.org/3382998/republic-of-suriname.html) en op de [Caribische eilanden](https://www.geonames.org/8505032/netherlands-antilles.html) steunde in belangrijke mate op de inzet van het leger.',
       seeAlso: expect.arrayContaining([
         {
-          id: 'https://guides.example.org/level-3a',
+          id: 'https://guides.example.org/guide6',
           name: 'Koninklijk Kabinet van Zeldzaamheden',
         },
+        {
+          id: 'https://guides.example.org/guide1',
+          name: 'Onderzoeken',
+        },
       ]),
       contentLocations: [
         {
diff --git a/packages/api/src/research-guides/fetcher.ts b/packages/api/src/research-guides/fetcher.ts
index 39ca255cc..d77c6edc6 100644
--- a/packages/api/src/research-guides/fetcher.ts
+++ b/packages/api/src/research-guides/fetcher.ts
@@ -70,7 +70,7 @@ export class ResearchGuideFetcher {
           ex:seeAlso ?subSet .
 
         ?subSet a ex:CreativeWork ;
-          ex:identifier ?identifier ;
+          ex:name ?subSetName ;
           ex:seeAlso ?guide .
 
         ?guide a ex:CreativeWork ;
@@ -78,7 +78,7 @@ export class ResearchGuideFetcher {
           ex:seeAlso ?relatedGuide .
 
         ?relatedGuide a ex:CreativeWork ;
-          ex:name ?subGuideName .
+          ex:name ?relatedGuideName .
       }
       WHERE {
         VALUES ?topSet {
@@ -86,7 +86,7 @@ export class ResearchGuideFetcher {
         }
 
         OPTIONAL {
-          ?topSet schema:name ?topSetName ;
+          ?topSet schema:name ?topSetName
           FILTER(LANG(?topSetName) = "${options.locale}")
         }
 
@@ -96,7 +96,7 @@ export class ResearchGuideFetcher {
         }
 
         OPTIONAL {
-          ?topSet schema:text ?topSetText ;
+          ?topSet schema:text ?topSetText
           FILTER(LANG(?topSetText) = "${options.locale}")
         }
 
@@ -106,10 +106,8 @@ export class ResearchGuideFetcher {
 
         OPTIONAL {
           ?topSet la:has_member ?subSet .
-
-          OPTIONAL {
-            ?subSet crm:P1_is_identified_by/crm:P190_has_symbolic_content ?identifier
-          }
+          ?subSet schema:name ?subSetName
+          FILTER(LANG(?subSetName) = "${options.locale}")
 
           # Get a selection of information from member guides, if any
           OPTIONAL {
@@ -171,20 +169,22 @@ export class ResearchGuideFetcher {
       CONSTRUCT {
         ?this a ex:CreativeWork ;
           ex:name ?name ;
+          ex:alternateName ?alternateName ;
           ex:abstract ?abstract ;
           ex:text ?text ;
           ex:encodingFormat ?encodingFormat ;
           ex:seeAlso ?relatedGuide ;
-          ex:contentLocation ?contentLocation ;
+          ex:contentLocation ?spatial ;
           ex:keyword ?keyword ;
-          ex:citation ?citation .
+          ex:citation ?citation ;
+          ex:contentReferenceTime ?contentReferenceTime .
 
         ?relatedGuide a ex:CreativeWork ;
           ex:name ?relatedGuideName .
 
-        ?contentLocation a ex:Place ;
-          ex:name ?contentLocationName ;
-          ex:sameAs ?contentLocationSameAs .
+        ?spatial a ex:Place ;
+          ex:name ?spatialName ;
+          ex:sameAs ?spatialSameAs .
 
         ?keyword a ex:DefinedTerm ;
           ex:name ?keywordName ;
@@ -194,6 +194,10 @@ export class ResearchGuideFetcher {
           ex:name ?citationName ;
           ex:description ?citationDescription ;
           ex:url ?citationUrl .
+
+        ?contentReferenceTime a ex:Event ;
+          ex:startDate ?contentReferenceTimeStartDate ;
+          ex:endDate ?contentReferenceTimeEndDate .
       }
       WHERE {
         VALUES ?this {
@@ -204,22 +208,27 @@ export class ResearchGuideFetcher {
           schema:additionalType <http://vocab.getty.edu/aat/300027029> . # "Guides"
 
         OPTIONAL {
-          ?this schema:name ?name .
+          ?this schema:name ?name
           FILTER(LANG(?name) = "${options.locale}")
         }
 
         OPTIONAL {
-          ?this schema:abstract ?abstract .
+          ?this schema:alternateName ?alternateName
+          FILTER(LANG(?alternateName) = "${options.locale}")
+        }
+
+        OPTIONAL {
+          ?this schema:abstract ?abstract
           FILTER(LANG(?abstract) = "${options.locale}")
         }
 
         OPTIONAL {
-          ?this schema:text ?text .
+          ?this schema:text ?text
           FILTER(LANG(?text) = "${options.locale}")
         }
 
         OPTIONAL {
-          ?this schema:encodingFormat ?encodingFormat .
+          ?this schema:encodingFormat ?encodingFormat
         }
 
         # Get a selection of information from related guides, if any
@@ -230,15 +239,15 @@ export class ResearchGuideFetcher {
         }
 
         OPTIONAL {
-          ?this schema:contentLocation ?contentLocation .
+          ?this schema:spatial ?spatial .
 
           OPTIONAL {
-            ?contentLocation schema:name ?contentLocationName .
-            FILTER(LANG(?contentLocationName) = "${options.locale}")
+            ?spatial schema:name ?spatialName
+            FILTER(LANG(?spatialName) = "${options.locale}")
           }
 
           OPTIONAL {
-            ?contentLocation schema:sameAs ?contentLocationSameAs
+            ?spatial schema:sameAs ?spatialSameAs
           }
         }
 
@@ -246,7 +255,7 @@ export class ResearchGuideFetcher {
           ?this schema:keywords ?keyword .
 
           OPTIONAL {
-            ?keyword schema:name ?keywordName .
+            ?keyword schema:name ?keywordName
             FILTER(LANG(?keywordName) = "${options.locale}")
           }
 
@@ -259,17 +268,29 @@ export class ResearchGuideFetcher {
           ?this schema:citation ?citation .
 
           OPTIONAL {
-            ?citation schema:name ?citationName .
+            ?citation schema:name ?citationName
             FILTER(LANG(?citationName) = "${options.locale}")
           }
 
           OPTIONAL {
-            ?citation schema:description ?citationDescription .
+            ?citation schema:description ?citationDescription
             FILTER(LANG(?citationDescription) = "${options.locale}")
           }
 
           OPTIONAL {
-            ?citation schema:url ?citationUrl .
+            ?citation schema:url ?citationUrl
+          }
+        }
+
+        OPTIONAL {
+          ?this schema:contentReferenceTime ?contentReferenceTime .
+
+          OPTIONAL {
+            ?contentReferenceTime schema:startDate ?contentReferenceTimeStartDate
+          }
+
+          OPTIONAL {
+            ?contentReferenceTime schema:endDate ?contentReferenceTimeEndDate
           }
         }
       }
diff --git a/packages/api/src/research-guides/index.integration.test.ts b/packages/api/src/research-guides/index.integration.test.ts
index bc13d1f10..3d2e3ed61 100644
--- a/packages/api/src/research-guides/index.integration.test.ts
+++ b/packages/api/src/research-guides/index.integration.test.ts
@@ -26,8 +26,8 @@ describe('getByIds', () => {
   it('returns the research guides', async () => {
     const results = await researchGuides.getByIds({
       ids: [
-        'https://guides.example.org/level-2a',
-        'https://guides.example.org/level-2c',
+        'https://guides.example.org/guide1',
+        'https://guides.example.org/guide4',
       ],
     });
 
@@ -38,7 +38,7 @@ describe('getByIds', () => {
 describe('getById', () => {
   it('returns the research guide', async () => {
     const researchGuide = await researchGuides.getById({
-      id: 'https://guides.example.org/level-2a',
+      id: 'https://guides.example.org/guide1',
     });
 
     expect(researchGuide).not.toBeUndefined();
diff --git a/packages/api/src/research-guides/index.ts b/packages/api/src/research-guides/index.ts
index d87fc4980..21273b9f4 100644
--- a/packages/api/src/research-guides/index.ts
+++ b/packages/api/src/research-guides/index.ts
@@ -6,6 +6,9 @@ import {
   ResearchGuideFetcher,
 } from './fetcher';
 
+// Re-export definitions for ease of use in consuming apps
+export * from './definitions';
+
 const constructorOptionsSchema = z.object({
   sparqlEndpointUrl: z.string(),
 });
diff --git a/packages/api/src/research-guides/rdf-helpers.test.ts b/packages/api/src/research-guides/rdf-helpers.test.ts
index 88c888956..ef04b277d 100644
--- a/packages/api/src/research-guides/rdf-helpers.test.ts
+++ b/packages/api/src/research-guides/rdf-helpers.test.ts
@@ -2,7 +2,11 @@ import {describe, expect, it} from '@jest/globals';
 import {StreamParser} from 'n3';
 import {RdfObjectLoader, Resource} from 'rdf-object';
 import streamifyString from 'streamify-string';
-import {createCitations, createResearchGuide} from './rdf-helpers';
+import {
+  createCitations,
+  createEvents,
+  createResearchGuide,
+} from './rdf-helpers';
 
 const loader = new RdfObjectLoader({
   context: {
@@ -19,11 +23,16 @@ beforeAll(async () => {
       ex:name "Name 1" .
 
     ex:researchGuide2 a ex:CreativeWork ;
-      ex:identifier "1" ;
       ex:name "Name 2" ;
+      ex:alternateName "Alternate name 2", "Alternate name 3" ;
       ex:abstract "Abstract 2" ;
       ex:text "Text" ;
       ex:encodingFormat "text/html" ;
+      ex:contentReferenceTime [
+        a ex:Event ;
+        ex:startDate "1924" ;
+        ex:endDate "1996" ;
+      ] ;
       ex:contentLocation [
         ex:name "Content Location" ;
         ex:sameAs <https://example.org/place> ;
@@ -65,6 +74,35 @@ beforeAll(async () => {
   await loader.import(streamParser);
 });
 
+describe('contentReferenceTimes', () => {
+  let resource: Resource;
+
+  beforeEach(() => {
+    resource = loader.resources['https://example.org/researchGuide2'];
+  });
+
+  it('returns undefined if property does not exist', () => {
+    const citations = createCitations(resource, 'ex:unknown');
+
+    expect(citations).toBeUndefined();
+  });
+
+  it('returns events if property exists', () => {
+    const events = createEvents(resource, 'ex:contentReferenceTime');
+
+    expect(events).toStrictEqual([
+      {
+        id: expect.any(String),
+        date: {
+          id: expect.any(String),
+          startDate: new Date('1924-01-01T00:00:00.000Z'),
+          endDate: new Date('1996-12-31T23:59:59.999Z'),
+        },
+      },
+    ]);
+  });
+});
+
 describe('createCitations', () => {
   let resource: Resource;
 
@@ -83,7 +121,7 @@ describe('createCitations', () => {
 
     expect(citations).toStrictEqual([
       {
-        id: 'n3-2',
+        id: expect.any(String),
         name: 'Citation',
         description: 'Citation Description',
         url: 'https://example.org/citation',
@@ -109,11 +147,21 @@ describe('createResearchGuide', () => {
 
     expect(researchGuide).toStrictEqual({
       id: 'https://example.org/researchGuide2',
-      identifier: '1',
       name: 'Name 2',
+      alternateNames: ['Alternate name 2', 'Alternate name 3'],
       abstract: 'Abstract 2',
       text: 'Text',
       encodingFormat: 'text/html',
+      contentReferenceTimes: [
+        {
+          id: expect.any(String),
+          date: {
+            id: expect.any(String),
+            startDate: new Date('1924-01-01T00:00:00.000Z'),
+            endDate: new Date('1996-12-31T23:59:59.999Z'),
+          },
+        },
+      ],
       seeAlso: [
         {
           id: 'https://example.org/researchGuide3',
@@ -136,21 +184,21 @@ describe('createResearchGuide', () => {
       ],
       contentLocations: [
         {
-          id: 'n3-0',
+          id: expect.any(String),
           name: 'Content Location',
           sameAs: 'https://example.org/place',
         },
       ],
       keywords: [
         {
-          id: 'n3-1',
+          id: expect.any(String),
           name: 'Keyword',
           sameAs: 'https://example.org/keyword',
         },
       ],
       citations: [
         {
-          id: 'n3-2',
+          id: expect.any(String),
           name: 'Citation',
           description: 'Citation Description',
           url: 'https://example.org/citation',
diff --git a/packages/api/src/research-guides/rdf-helpers.ts b/packages/api/src/research-guides/rdf-helpers.ts
index f09bdbd25..32e0050bd 100644
--- a/packages/api/src/research-guides/rdf-helpers.ts
+++ b/packages/api/src/research-guides/rdf-helpers.ts
@@ -1,13 +1,14 @@
 import {
   createPlaces,
   createThings,
+  createTimeSpan,
   getPropertyValues,
   onlyOne,
   removeNullish,
 } from '../rdf-helpers';
 import type {Resource} from 'rdf-object';
 import {Citation, ResearchGuide} from './definitions';
-import {Term} from '../definitions';
+import {Event, Term} from '../definitions';
 
 function createCitation(citationResource: Resource) {
   const name = onlyOne(getPropertyValues(citationResource, 'ex:name'));
@@ -46,14 +47,33 @@ function createResearchGuides(
   return researchGuides.length > 0 ? researchGuides : undefined;
 }
 
+function createEvent(eventResource: Resource) {
+  const timespan = createTimeSpan(eventResource);
+
+  const event: Event = {
+    id: eventResource.value,
+    date: timespan,
+  };
+
+  return event;
+}
+
+export function createEvents(resource: Resource, propertyName: string) {
+  const properties = resource.properties[propertyName];
+  const events = properties.map(property => createEvent(property));
+
+  return events.length > 0 ? events : undefined;
+}
+
 export function createResearchGuide(
   researchGuideResource: Resource,
   stackSize = 1
 ) {
-  const identifier = onlyOne(
-    getPropertyValues(researchGuideResource, 'ex:identifier')
-  );
   const name = onlyOne(getPropertyValues(researchGuideResource, 'ex:name'));
+  const alternateNames = getPropertyValues(
+    researchGuideResource,
+    'ex:alternateName'
+  );
   const abstract = onlyOne(
     getPropertyValues(researchGuideResource, 'ex:abstract')
   );
@@ -65,7 +85,7 @@ export function createResearchGuide(
   let seeAlso: ResearchGuide[] | undefined = undefined;
 
   // Prevent infinite recursion
-  if (stackSize < 4) {
+  if (stackSize < 5) {
     seeAlso = createResearchGuides(
       researchGuideResource,
       'ex:seeAlso',
@@ -73,6 +93,10 @@ export function createResearchGuide(
     );
   }
 
+  const contentReferenceTimes = createEvents(
+    researchGuideResource,
+    'ex:contentReferenceTime'
+  );
   const contentLocations = createPlaces(
     researchGuideResource,
     'ex:contentLocation'
@@ -82,11 +106,12 @@ export function createResearchGuide(
 
   const researchGuideWithUndefinedValues: ResearchGuide = {
     id: researchGuideResource.value,
-    identifier,
     name,
+    alternateNames,
     abstract,
     text,
     encodingFormat,
+    contentReferenceTimes,
     seeAlso,
     contentLocations,
     keywords,