At ArcGIS Enterprise 10.9.1, named users in the Enterprise portal must be licensed with the ArcGIS Knowledge user type extension to create, edit, and update Knowledge Graph Server services. At ArcGIS Enterprise 11.0, your account no longer requires the ArcGIS Knowledge user type extension, but you must be signed in to the Enterprise portal to create, edit, and update Knowledge Graph Server services.
The dataModel resource defines the types of entities and relationships that can be created in a knowledge graph service as well as some additional settings.
The dataModel resource allows clients to query and edit the entity types and their properties, as well as the relationship types and their properties. By defining these types and their properties, the data model defines the schema of the graph.
The response format. The only supported format is html.
The following is an example request URL to get information about the graph resource for a knowledge graph service named SupplyChain.