The Simulation Data Model relies on concepts organized as SKOS vocabularies. Several vocabularies have been developed by the VO-Theory I.G. Some of them have been developed thanks to the journals keywords. The astronomical objects vocabulary has been developed by the Semantic working group.

New terms can be added to these vocabularies contacting the VO-Theory I.G. Once sufficiently mature, the process to develop these vocabularies could be supervised by the Semantics W.G. as for the UCDs.

Present vocabularies are :

• Algorithms
• Astronomical objects
• Input parameters
• Physical processes
• Physical quantities
• Data object types

The main official VO theory vocabulary terms can be found at this address, with a search functionality and description of terms relations:

• VO-Theory vocabularies

UCDs can also be used as valid VO-Theory vocabularies in some cases.

Links

• SKOS vocabularies
• Ontology of Astronomical Objects
• UCD syntax etc
• UCD1+ controlled vocabulary
• UCD maintenance
• IVOA Standard Vocabulary