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"Higgins is an open source Internet identity framework designed to integrate identity, profile, and social relationship information across multiple sites, applications, and devices. Higgins is not a protocol, it is software infrastructure to support a consistent user experience that works with all popular digital identity protocols, including WS-Trust, OpenID, SAML, XDI, LDAP, and so on." "The heart of the Higgins user experience is the i-card - a visual metaphor for a set of digital identity data about you, someone you know, or a website you use."