Objectivity REST : Schema Resources : DELETE /v1/schema/{class}
DELETE /v1/schema/{class}
DELETE /v1/schema/{class}
Deletes the class description for an existing type specified by fully qualified class name or class number.
Response Format
URL Parameters 
Provides the alias of a federated database that is included in the REST server’s configuration file; see Configuring the REST Server in Objectivity/DB Administration.
Before deleting a class, remove all objects of that class from the federated database. Objects of the class become inaccessible to applications after the class is deleted.
Also, attributes of other classes that reference objects of the deleted class are deleted.
Curl Example 
curl -X DELETE localhost:8185/v1/schema/FleetData.Customer
Status: 204 No Content