XFN 1.1 profile - GMPG
XFN 1.1 relationships meta data profile Authors. Tantek Çelik; Matthew Mullenweg; Eric Meyer; As described in HTML4 Meta data profiles.. rel. HTML4 definition of the 'rel' attribute. Here are some additional values, each of which can be used or omitted in any combination (unless otherwise noted, and except where prohibited by law) and their meanings, symmetry, transitivity and inverse if any.