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− | * A [[ContextRef]] is a URI that identifies a [[Context]].
| + | [[Image:Higgins_logo_76Wx100H.jpg|right]] |
− | * [[ContextRef]]s either directly or indirectly (e.g. by conventions, lookups, etc.) provide sufficient information to identify a [[Context]]
| + | == Version == |
− | * Two different [[ContextRef]]s may refer to the same [[Context]]
| + | This page describes the concept of a [[ContextId]] as used in [[Context Data Model 2.0]]. |
− | * If two [[ContextRef]]s are equal, they refer to the same underlying [[Context]] dataset, although not necessarily the same [[Context]] "container" instance, and, based on the authorization of the [[Digital Identity]] passed in during authentication, may only be permitted to see a subset of its contents.
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− | * A given [[ContextRef]] may be used against multiple [[Context Provider]]s to produce the same [[Context]] (although, as mentioned, different IContext instances).
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− | * [[ContextRef]]s MAY be XRIs
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− | * [[ContextRef]]s MUST be subdivideable by "/" (e.g. to allow constructing through the following possible kind of concatenation: <contextRef-root>/<schemaType>/<object-identifier>)
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− | * ContextRefs are used by the [[Identity Attribute Service (IdAS)]] and its [[Context Provider]]s
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− | ==Examples== | + | == Definition == |
− | # http://www.fabrikam123.example/4f544/ldap347/HR/employees --an LDAP employee directory
| + | * An identifier of a [[Context]] |
− | # proprietary-scheme-a://contactlist -- user's contact list stored as tab-delimited file
| + | * A ''Context UDI'' as defined in [http://www.azigo.com/udi/udi-syntax.html UDI Syntax] |
− | # xri://foo*bar/baz
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− | ==Open issues==
| + | [[Category:Context Data Model 2.0]] |
− | # Do we need a method in IdAS to test that two given ContextRefs actually resolve to the same [[Context]]?
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− | ==See Also==
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− | * [http://eclipse.org/higgins Higgins Home]
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− | * [[Higgins Wiki]]
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− | * [[Concepts]]
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