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Yadis 1.0

The Identity and Accountability Foundation for Web 2.0

— Fully under control of the user — URL-based — Simple — Multi-protocol — Multi-vendor —

Originator: NetMesh Inc.

  • Several open-source and corporate implementations, most platforms
  • Single Sign-On, attribute exchange, authenticated messaging, social functionality...

NetMesh InfoGrid,

Originator: Six Apart Inc.

  • Several open-source implementations, most platforms
  • Single Sign-On, delegation

Livejournal, Movable Type,,

Originator: Cordance Corp. at al.

  • Several open-source and proprietary implementations
  • Single Sign-On, attribute exchange, data sharing, introduction forms, link contracts...

Cordance, Ootao, OASIS,

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Yadis Specification

The current version of the Yadis specification is 1.0, released March 2006.

Older documents are available at Yadis Documents.


Yadis Overview


Current Work




Coming Soon


Past Events


More Information