Extended Metadata Schema Properties
Overview
‘Extended’ metadata allows some customisation by Registration Agencies. All properties must be used without variation. Requirements, constraints, and format must be enforced. Controlled lists, however, may be modified.
Registration agencies may:
Add existing controlled list schemas from other sources, so long as they are human and machine-readable with a single page per value.
Build new controlled list schemas, so long as they are human and machine-readable with a single page per value.
Note that not all existing schemes provide a URI for each term, in which case Registration Agencies will need to build and publish their own lists.
All non-canonical schemas or controlled lists must be registered with the Registration Authority and published to a vocabulary service.