Yadis

From LID Wiki

In summer 2005, Brad Fitzpatrick (of Six Apart / LiveJournal, and creator of OpenID), David Recordon (then, also of Six Apart; now with Verisign), and Johannes Ernst (of NetMesh, creator of LID) and Joaquin Miller (of NetMesh) got together to figure out how to make the OpenID and LID URL-based, User-centric Digital Identity technologies interoperable as to leverage each protocol's most compelling features with each other. We figured this would be a good idea given that both are based on URLs as identifiers and are bottom-up initiatives with fairly similar goals. Working on this problem, we realized quickly that what we were really building was a light-weight interoperability framework for personal digital identities since we addressed the problems in a quite general manner.

This has led to yadis.org, a project, architecture and specification for meta-data discovery for interoperable User-centric Digital Identity. This project released its Yadis 1.0 specification in early 2006.

We encourage all LID implementors to base their implementation on Yadis going forward: Yadis allows software to declare, and determine which identity-related protocols and profiles are supported by any given identity or Relying Party URL. All LID services supported by any implementation should be exposed as Yadis Service declarations in the Yadis XML file.