The OCCI working groups will create two deliverables. One will be a use case and requirements document. The other will specify the OCCI protocol.
The OCCI document series describes what each OCCI compatible interface needs to provide. The overall OCCI specification itself is setup modular to be extensible and includes the following parts:
Each of these parts is described in a separate document so the overall specification comes in the form of a document series.
All these parts and the information within are mandatory for implementors (unless otherwise specified).
The current draft version can be found here
The document describing the use cases and requirements can be found here.