The following headers should be added to responses to HEAD and GET requests to LDPRv's only when the resource is versioned (has the http://fedora.info/definitions/fcrepo#VersionedResource type):
- Vary: accept-datetime
- Include 'Link: rel="timegate"' referencing itself.
- Include 'Link: rel="timemap"' on versioned resource pointing to LDPCv.
- Since the LDPRv is also its own timegate, it must return an 'original' link header referencing itself
See Pattern 1.2 in https://tools.ietf.org/html/rfc7089#page-18 for details.