我发现Wordpress.com.cn链接管理的XFN代码生成器中文化不太恰当，于是专门查了一下XFN官方的定义，如下：

Friendship (pick at most one)

contact

Someone you know how to get in touch with. Often symmetric.

acquaintance

Someone who you have exchanged greetings and not much (if any) more — maybe a short conversation or two. Often symmetric.

friend

Someone you are a friend to. A compatriot, buddy, home(boy|girl) that you know. Often symmetric.

Physical

met

Someone who you have actually met in person. Symmetric.

Professional

co-worker

Someone a person works with, or works at the same organization as. Symmetric. Usually transitive.

colleague

Someone in the same field of study/activity. Symmetric. Often transitive.

Geographical (pick at most one)

co-residentM

Someone you share a street address with. Symmetric and transitive.

neighbor

Someone who lives nearby, perhaps only at an adjacent street address or doorway. Symmetric. Often transitive.

Family (pick at most one)

child

A person’s genetic offspring, or someone that a person has adopted and takes care of. Inverse is parent.

parent

Inverse of child.

sibling

Someone a person shares a parent with. Symmetric. Usually transitive.

spouse

Someone you are married to. Symmetric. Not transitive.

kin

A relative, someone you consider part of your extended family. Symmetric and typically transitive.

Romantic

muse

Someone who brings you inspiration. No inverse.

crush

Someone you have a crush on. No inverse.

date

Someone you are dating. Symmetric. Not transitive.

sweetheart

Someone with whom you are intimate and at least somewhat committed, typically exclusively. Symmetric. Not transitive.

Identity

me

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.