Context UDI

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Version

This page describes the Higgins ContextId Data Range UDI used in the Higgins Global Graph 1.1.

Definition

• A Context UDI is a kind of URI Data Range
• The value of a Context UDI UDI identifies a Context
• The value of a Context UDI MUST conform to the ABNF defined below

Definition

• An Context UDI is defined in UDI Syntax

Relationship to OpenID

Any OpenID 2.0 identifier as defined by OpenID Authentication 2.0 may function as a Higgins ContextId. OpenID 2.0 supports both URLs and XRIs. All of the examples of contexthttpURI and contextXRI above are valid OpenID 2.0 identifiers.

The only caveat to keep in mind is that if an OpenID 2.0 URL is used as a Higgins ContextId, the XRDS or XDI document to which it resolves must EITHER contain:

• Only one XRDS service endpoint or XDI context reference describing the target Context, OR
• The consuming application must know how to select the XRDS service endpoint or XDI context descriptor it requires (i.e., it must know which Higgins Context Type it is seeking).

Used as a Value Data Range By

• ContextId

See Also

• ContextId
• Context Relation
• Context Correlation
• EntityId Data Range