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Difference between revisions of "Context"
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| − | ==Definition | + | ==Definition== |
| − | A [[Context]] is a container of [[Digital Subject]]s | + | A [[Context]] is a container of one or more [[Digital Subject]]s. [[Context]]s are provided by [[Context Provider]]s. |
| − | Examples of [[Context]]s include directories, informal groups, project teams, collaboration spaces, and communications systems and networks. | + | Examples of multiple-subject [[Context]]s include: directories, informal groups, project teams, collaboration spaces, and communications systems and networks. |
| − | Every [[Context]] | + | Every [[Context]] defines its own identifier namespace. Every [[Digital Subject]] within a [[Context]] has a unique identifier from this namespace called "CUID" --a Contextually Unique Identifier [[Identity Attribute]]. |
| − | Every [[Context]] has a schema (or more correctly | + | Every [[Context]] has a schema (or more correctly, ontology) that describes kinds of [[Digital Subject]]s and [[Identity Attribute]]s that an instance of this Context contains. |
<to-be-written: describe authN policies> | <to-be-written: describe authN policies> | ||
Revision as of 00:37, 9 December 2006
Definition
A Context is a container of one or more Digital Subjects. Contexts are provided by Context Providers.
Examples of multiple-subject Contexts include: directories, informal groups, project teams, collaboration spaces, and communications systems and networks.
Every Context defines its own identifier namespace. Every Digital Subject within a Context has a unique identifier from this namespace called "CUID" --a Contextually Unique Identifier Identity Attribute.
Every Context has a schema (or more correctly, ontology) that describes kinds of Digital Subjects and Identity Attributes that an instance of this Context contains.
<to-be-written: describe authN policies>
<to-be-written: describe authZ policies>
Contexts are implemented by Context Providers.
Digital Subject Networks
In a given Context an Entity is represented as one or more Digital Subjects engaged in interactions with other Digital Subjects. These interactions between Digital Subjects are represented by [Subject Relationship] objects. Digital Subjects are connected by these [Subject Relationships] into a directed graph structure. This graph is often referred to as the Network (as in social network). A Context with no inter-Digital Subjects links is effectively equivalent to a directory or a list.