Core: Terms for writing vocabularies - XML source - JSON source
Capabilities: Terms describing capabilities of a service - XML source - JSON source
Measures: Terms describing monetary amounts and measured quantities - XML source - JSON source
Validation: Terms describing validation rules - XML source - JSON source
Authorization: Terms for describing authorization requirements of the service - XML source - JSON source
Aggregation: Terms to describe which data in a given entity model can be aggregated, and how - XML source - JSON source
Temporal: Terms for describing time-dependent data - XML source - JSON source