A metadata registry is a central location in an organization where metadata definitions are stored and maintained in a controlled method.
Read more about Metadata Registry: Use of Metadata Registries, Common Characteristics of A Metadata Registry, Clear Separation of Semantics and System-specific Constraints, ISO Standards, Metadata Registry Roles, Metadata Element Workflow, Metadata Navigation, Search and Publishing, Examples of Public Metadata Registries, Metadata Registry Vendors / Solutions