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OpenID is a way to authenticate that you control a particular URL.
See OpenID best practices for how OpenID providers and consumers can currently best support microformats.
See openid-brainstorming for more ideas on how sites in general can use microformats and OpenID together as building blocks for powerful solutions.
See the OpenID site for more on OpenID.
- Web sign-in
- hCard 1.0
- XFN - The XHTML Friends Network and especially rel="me"