Link Relations
All WebFinger links have a rel property that identifies the type of the link relation.
Values can be URIs or a registered relation type.
Any valid rel value can be used in WebFinger links.
The following rel values have been defined in the webfinger.net namespace to address common WebFinger use cases.
http://webfinger.net/rel/avatar
The link relation http://webfinger.net/rel/avatar identifies a person’s
avatar and may be in any standard image format (e.g., PNG, JPEG, GIF).
http://webfinger.net/rel/profile-page
The link relation http://webfinger.net/rel/profile-page identifies the main
home/profile page that a human should visit when getting info about that
webfinger account. It says nothing about the content-type (or microformats),
but it’s likely text/html if it’s for users.
Additional references:
- WebFinger section 4.4.4.1 defines the rel property
- Web Linking (RFC 8288) defines the Link Relation Type Registry and provides more detail on links in general.
- The microformats.org wiki maintains a page of existing rel values used in the wild.