The complete Liberty Specifications can be found here.

Liberty Alliance ID-WSF Data Services Template v2.0 Specifications

Liberty Alliance ID-WSF 1.1 Specifications

Liberty Alliance ID-FF 1.2 Specifications

For an overview of the relationship between ID-FF, SAML2, and ID-WSF 2.0, please see the discussion in the Federation section of Strategic Initiatives.

Liberty Alliance Specifications - Support Documents and Utility Schema Files

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