Provides machine-readable declarations 
of vocabulary terms, mappings between those 
terms (either within a particular thesaurus or across multiple thesauri or classification 
schemes) and automatic classification services.  The intention is to allow consumers of 
the service to map terms, allowing users to use one set of terminology, but automatically 
mapping their terms to alternative or additional terms in thesauri or classification 
schemes used by target services. (Note that terminology is not limited to subject but 
also includes audience level, resource type and certification).
The key functions for a this service are:
- providing decalarions of vocabulary terms
 
- providing mappings from one term to other terms
 
- providing automatic classification of resources according to one or more vocularies 
and/or thesausi
 
Specifications with applicability to this 
area are:
- IMS Vocabulary Definition and Exchange (VDEX)
 
- RDFS
 
- OWL
 
Related services are: