...
This named graph holds organizational objects that are global to the deployed MMS5 cluster. Specifically, a Project is the container for version-controlled data (similar to a git repository), a Collection is readonly view that selects the union of any number of Refs when queried, and an Org is an entity that owns Projects or Collections.
Linked Data Platform (LDP) actions
The following list describes the LDP semantics of various HTTP operations available on Cluster objects.
...