TINDER-66 What changed with RFC 6122?

I just came across TINDER-66 and wondered what exactly changed with RFC 6122? Could you elaborate that a bit?

The difference lies primarily in the names given to the various parts of the JID. Not sure about the implementation details, we’ll need to investigate a little further for those.

RFC 3920:

jid = [ node “@” ] domain [ “/” resource ]

RFC 6122:

jid = [ localpart “@” ] domainpart [ “/” resourcepart ]