The active portal account must be licensed with the ArcGIS Knowledge user type extension to use Knowledge Graph Server services.
The indexes resource allows you to access and edit indexes on the fields associated with a specific entity type or relationship type in a knowledge graph service's data model resource. You can modify the indexes associated with a type's fields if you have sufficient privileges.
The response format. The only supported format type is html.
The following is an example request URL to access indexes associated with the data model resource's Warehouse entity type for a knowledge graph service named SupplyChain: