Difference between revisions of "ContextId"

Revision as of 13:05, 22 April 2008

This page describes the concept of a ContextId as used in Higgins Global Graph 1.1.

A ContextId is an Attribute of a Context whose value is the ContextId Data Range UDI that identifies this same Context

It is not required for a ContextIds to resolve to a Context instance in which case this is referred to as an abstract ContextId. However, most Contexts are not abstract, and can be resolved a network (or local) data access service to discover the information necessary to access the Context.

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 * It is not required for a [[ContextId]]s to resolve to a [[Context]] instance in which case this is referred to as an abstract [[ContextId]]. However, most [[Context]]s are not abstract, and can be resolved a network (or local) data access service to discover the information necessary to access the [[Context]].
-== ContextIds and IdAS==
-* The [[Identity Attribute Service (IdAS)]] can be used as a service to access a [[Context]] given a [[ContextId]].
-* If two [[ContextId]]'s values are equal, they refer to the same underlying [[Context]], although not necessarily the same [[Context]] "container" instance returned by IdAS. This means that, as a requester of information, different clients of IdAS may see different subsets of the [[Context]] based on the authorization passed in during authentication.
-* A given [[ContextId]] may be used against multiple [[Context Provider]]s to produce the same [[Context]] (although, as mentioned, different [[Context]] instances).
 == See Also ==