- XFN+hCard supporting friends lists - examples in the wild of XFN usage.
- xfn-implementations
- xfn-cheatsheet - see http://gmpg.org/xfn/join and existing-rel-values
- xfn-faq
- xfn-clarifications - should eventually be rolled into XFN info on GMPG.org.
- xfn-issues
- xfn-brainstorming
