Entity Changes API
Discover the details of the Entity Changes API.
Overview
Users can retrieve a chronologically sorted history of changes to WorldCat Entity data.
Note: Included with OCLC Meridian Subscription.
To learn about OCLC APIs and get started with the Entity Changes API, see:
- OCLC APIs > Get Started
- WorldCat Entities API context JSON
- WorldCat ontology guidelines and standards
If you're ready to start using the Entity Changes API, the OCLC Developer Network can help you learn more. The OCLC Developer Network allows you to learn about OCLC APIs, view OCLC API documentation, and participate in the OCLC APIs community.
Types of changes
The following types of changes can be retrieved:
History Table | Changes API |
---|---|
Create entity value | Create |
Add, remove, or replace entity value | Update |
Context and standard URLs
Examples
Main code
GET v1/changes |
{ "context": [ "https://www.w3.org/ns/activitystreams", "https://id.oclc.org/api/context.json", "https://emm-spec.org/0.1/context.json" ], "summary": "Worldcat Entity - Changes", "type": "OrderedCollection", "id": "https://entities.api.oclc.org/changes", "first": { "type": "OrderedCollectionPage", "id": "https://entities.api.oclc.org/changes/pages/1" }, "last": { "type": "OrderedCollectionPage", "id": "https://entities.api.oclc.org/changes/pages/433" }, "totalItems": (total number of changed items) }
Pages code
GET v1/changes/pages/{pageNumber} |
Page1 is first page of changes in Wordcat Entities and Last page is most recent changes.
"type": "Add, Remove, Create, Replace", "published": "2024-04-12T08:31:31.514Z", "object": { "id": "E39QJKdVFFTCvc69T8GmRRt4gJ", "type": "ENTITY_PROPERTY", "updated": "2024-04-12T08:31:31.514Z"