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Difference between revisions of "Node Relation"

(Format)
(Definition)
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==Definition==
 
==Definition==
* A [[Relation]] is a type of [[Attribute]]
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* A [[Relation]] is a kind of [[Attribute]]
 
* The value of a [[Relation]] is a URI that identifies an [[Entity]] in a [[Context]]
 
* The value of a [[Relation]] is a URI that identifies an [[Entity]] in a [[Context]]
  

Revision as of 18:57, 31 January 2008

Definition

Details

Note: If the two Entities being linked are digital representations of the same person, thing or concept then a specialization of Relation called a Correlation should be used.

Format

A Relation is a URI. It is comprised of a ContextId URI combined with an optional identifier string called a LocalId. The LocalId may only be omitted when the Context identified by the ContextId contains exactly one Entity.

Two kinds of Relations are defined: a URIrelation (Hash URI) and XRIrelation. The former is consistent with one of the two proposed W3C's Cool URIs approaches. The latter is an XRI as defined by XRI Syntax 2.0.

ABNF

The following ABNF defines a Higgins Relation. Rules not defined in this ABNF are defined in the ABNF for XRI 2.0 (which includes the IRI ABNF from RFC 3987).

relation           = URIrelation / XRIrelation
URIrelation        = contextURI [ "#" subjectId ]
XRIrelation        = contextXRI [ "//" subjectId ]

Relationship to OpenID

Open Issues

See Also

Links

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