Metamodel Resource Model
The Model service provides operations to retrieve information about models. A structure is used as a model if it is used for persisting data about an entity. Some of the fields in the model structure are also used for creating indexes for querying.
One or more services can operate on the same resource type. One or more services can provide the model structure for an entity of this resource type. Using Model service you can retrieve the list of all the structure elements that are model structures for a given resource type.