RFC 2806: a URL scheme for
describing phone numbers. A URL looks like
tel:+1-312-555-4589. Cute. I didn’t know this
existed. But Mobile Safari on the iPhone does. It seems more
immediately useful than hCards
(browsers already understand it!) But much more limited in scope: its
scope is expended on standards for modem and fax calls. Wow. Retro.
I’ll be keeping it in mind, I believe it will become more important.