Fwd: whois server features

[shawn wilson]

Is there a list of NIC (and other popular whois server) features (what
can be searched on) and what data they provide (and what title they
give it)?

A quick search yields:
http://www.ripe.net/ripe/docs/ripe-358
https://www.arin.net/resources/whoisrws/whois_diff.html
https://www.apnic.net/apnic-info/whois_search/using-whois/searching/query-options

(In declining order of information - I also couldn't find the info for
AFRINIC queries) I also couldn't find information on what fields they
have (and obviously how they map to one another). There are also a few
other whois servers around that I have no idea about:
https://www.opensource.apple.com/source/adv_cmds/adv_cmds-149/whois/whois.c