The Directory Model APIs are in the
A manifest is a textual DSL that describes the domain model of the directory. It contains the definitions for all object types, including the relations and permissions defined for each.
GetManifest- get the directory manifest
SetManifest- sets the directory manifests
DeleteManifest- deletes the directory manifest, along with any data in the directory
Learn about defining a manifest for a domain model here.
A full annotated example of the manifest language can be found here.