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
UCDs can also be used as valid VO-Theory vocabularies
The main official vocabularies can be found at the address :