export registry-related terms for ease of reference

[nigelmegitt]

§6.5.2 Publishing Registries requires that registries link to §6.5 The Registry Track defined as the term registry but does not export the definition registry which would make it much easier to reference.

Additionally the terms:

• custodian
• registry definition
• registry entries
• registry table

are useful for referencing when creating a registry definition.

Would it be possible to export those definitions?

[frivoal]

Accepted by Editor's discretion.

[nigelmegitt]

Many thanks!