EntityMetadata allows for: "Consumers to discover the metadata associated with each supported entity. Doing so allows for the discovery of Provider defined constraints on the CIMI defined attributes as well as discovery of any new extension attributes that the Provider may have defined."
right now I'm just mapping deltacloud features to CIMI EntityMetadata - for example to signal that a Machine will not accept a consumer defined name as this is set by the provider (EC2 is one case). I think this mechanism can be useful for getting around the particularities of individual providers - we can add to it as issues arise, marios
