LOC has released new relator terms since we the development of the Typed Relation field and its incorporation into the Starter Site. Their term list, it seems, is updated continuously, so there are no relevant release notes.
The following (
thanks to Joe C) were found to be missing from the Typed Relation/Contributors field in the Starter Site, and you may wish to add them if you want the full expression of the relators vocabulary:
relators:afd|Assistant film director
relators:anc|Announcer
relators:aue|Audio engineer
relators:aup|Audio producer
relators:bka|Book artist
relators:cad|Casting director
relators:cop|Camera operator
relators:dbd|Dubbing director
relators:dgc|Degree committee member
relators:djo|DJ
relators:edd|Editorial director
relators:fon|Founder
relators:gdv|Game developer
relators:gst|Guest
relators:ink|Inker
relators:ltr|Letterer
relators:mka|Makeup artist
relators:mup|Music programmer
relators:mxe|Mixing engineer
relators:nan|News anchor
relators:onp|Onscreen participant
relators:pad|Place of address
relators:pbl|Publisher
relators:pnc|Penciller
relators:pup|Publication place
relators:rap|Rapporteur
relators:rxa|Remix artist
relators:sde|Sound engineer
relators:sfx|Special effects provider
relators:swd|Software developer
relators:tad|Technical advisor
relators:tau|Television writer
relators:tlg|Television guest
relators:tlh|Television host
relators:vfx|Visual effects provider
relators:wap|Writer of approbation
relators:waw|Writer of afterword
relators:wfs|Writer of film story
relators:wft|Writer of intertitles
relators:wfw|Writer of foreword
relators:wts|Writer of television story
Also missing are relators:pup|Publication place and relators:pbl|Publisher, but the Starter Site has separate fields for those.
Maybe you're cool without these, and that's fine. On some of our sites, we've pared down the available relations to just the ones that are useful for our site. There's no way to programmatically do what everyone wants, so if you want these (or some of these) terms, paste them into the "Contributors settings for Repository Item" (Manage > Structure > Content Types > Repository Item > Manage Fields > Contributors (field_linked_agent)).
Also thanks to Joe for adding these to the Starter Site, so new sites should have them!
Cheers,
Rosie (and the Metadata Committee)