Isaac’s XFN Profile

Original Authors of this Specification

Original version of this extension found at

Extended by Isaac Z. Schlueter. Additions to the original XFN profile are wrapped in <ins> tags, and will be styled differently in user-agents that support CSS.

As described in HTML4 Meta data profiles.


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. Please see the XFN home page for more information about XFN.

friendship (pick at most one)

Someone you know how to get in touch with. Often symmetric.
Someone who you have exchanged greetings and not much (if any) more — maybe a short conversation or two. Often symmetric.
Someone you are a friend to. A compatriot, buddy, home(boy|girl) that you know. Often symmetric.


Someone who you have actually met in person. Symmetric.


Someone a person works with, or works at the same organization as. Symmetric. Usually transitive.
Someone in the same field of study/activity. Symmetric. Often transitive.
Someone who purchases a person’s services. Possibly symmetric. Possibly transitive.

geographical (pick at most one)

Someone you share a street address with. Symmetric and transitive.
Someone who lives nearby, perhaps only at an adjacent street address or doorway. Symmetric. Often transitive.

family (pick at most one)

A person’s genetic offspring, or someone that a person has adopted and takes care of. Inverse is parent.
Inverse of child.
Someone a person shares a parent with. Symmetric. Usually transitive.
Someone you are married to. Symmetric. Not transitive.
A relative, someone you consider part of your extended family. Symmetric and typically transitive.


Someone who brings you inspiration. No inverse.
Someone you have a crush on. No inverse.
Someone you are dating. Symmetric. Not transitive.
Someone with whom you are intimate and at least somewhat committed, typically exclusively. Symmetric. Not transitive.


A link to yourself at a different URL. Exclusive of all other XFN values. Required symmetric. There is an implicit “me” relation from a subdirectory to all of its contents.


A link to a site that is managed and operated by someone else and outside of the linker’s control. Usually symmetric. Possibly transitive. There is an implicit “external” relation to outside domains when no other relation is specified.
A link to a site or person that someone uses as a source of information. This may be used to indicate a teacher or authority that one goes to for help, or simply a website with a lot of information. Note that this differs from “help” - a “reference” relation does not indicate that the linked site provides information about the linking site, but rather describes the relationship between the author and the destination or the destination’s author. Possibly symmetric. Usually transitive.

2 Responses to “Isaac’s XFN Profile”

  1. On September 14th, 2004 at 21:40:07, Torqued Said:

    XFN infectionSo, I’m in Isaac’s office today, and he asks me if I would like to partake in a little geekly goodness, or something to that effect. So, of course I say yes. He begins to pull something up on his computer so I come around his desk so I can see what’s g…

  2. On April 8th, 2005 at 10:28:17, Schlueterica Said:

    Getting XFN Working in b2evoI just realized that I never wrote this up, even though I added it to my site way back in September.

    This is how you can set up your b2evo blog to be XFN-Friendly.

    Read on for the step-by-step.

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