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 domain resource allows you to update or delete a specific domain defined in a knowledge graph service's data model resource if you have sufficient privileges.
The response format. The only supported response format is html.
The following is a sample request URL to get information about the WarehouseType domain that is defined in the data model resource for a knowledge graph service named SupplyChain: