Looking for docs on "A" RR duality of functions


Do you know if there are any docs (RFC, drafts, independent...) that
study the tricks being done with the A/AAAA RRs? What I mean is that it
is currently being used not only to resolve the IP address of a
hostname, but for load-balancing as well, the case being that the
hostname is not just a "host"-name anymore, but a "service"-name (?) so
to speak.

I'd like to know if somebody else has gone deeper into this and if there
are related documents on the matter.


Is rfc7553 what you are looking for? https://www.rfc-editor.org/info/rfc7553