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| − | A ContextRef is a URI that identifies a [[Context]].
| + | [[Image:Higgins_logo_76Wx100H.jpg|right]] |
| − | * ContextRefs are used by the [[Identity Attribute Service (IdAS)]] and by [[Context Provider|Context Providers]]
| + | == Version == |
| − | * ContextRefs either directly or indirectly (e.g. by conventions, lookups, etc.) provide sufficient information to identify a [[Context]]
| + | This page describes the concept of a [[ContextId]] as used in [[Context Data Model 2.0]]. |
| − | * A given ContextRef may be used against multiple [[Context Provider|Context Providers]] to produce the same [[Context]] (although different IContext instances).
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| − | * A ContextRef may be an XRI
| + | |
| | | | |
| | + | == Definition == |
| | + | * An identifier of a [[Context]] |
| | + | * A ''Context UDI'' as defined in [http://www.azigo.com/udi/udi-syntax.html UDI Syntax] |
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| − | ==Examples==
| + | [[Category:Context Data Model 2.0]] |
| − | # http://www.fabrikam123.example/4f544/ldap347/HR/employees --an LDAP employee directory
| + | |
| − | # proprietary-scheme-a://contactlist -- user's contact list stored as tab-delimited file
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| − | | + | |
| − | | + | |
| − | ==Open issues==
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| − | * Since providers are ultimately the generators/assigners of new ContextRefs should we allow them to assign their own schemes if they use proprietary technology (as in "proprietary-scheme-a" in #2 above)?
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| − | * Do we assume all URIs that use the HTTP scheme are resolvable? (URLs)
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| − | * Beyond resolvable, should we require as Tony has suggested that all HTTP-scheme URIs are also WS-Addressing endpoint references? (This would solve the problem of how a provider could get the policy and other metadata to help it try to open and access the context data)
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| − | *Do we need a method in IdAS to test that two given ContextRefs actually resolve to the same [[Context]]?
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Latest revision as of 11:35, 31 May 2021
Version
This page describes the concept of a ContextId as used in Context Data Model 2.0.
Definition
