A metadata registry provides machine-readable 
information about the metadata 
schemas in use by particular metadata-based services. The primary intention of this 
service is to allow service consumers to automatically determine information about 
appropriate search terms and the structure of metadata records that will be returned to 
them. However, metadata registries also provide a useful human-oriented service, 
allowing people to see what metadata schemas are in use by which services - providing 
a basis for metadata schema sharing and re-use.
The key functions for a this service are:
- providing machine-readable declarations of metadata schemas
 
- providing mappings between metadata schemas
 
- providing human-readable view of metadata schemas
 
Specifications with applicability to this 
area are:
Related services are: