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Difference between revisions of "UDI"

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== Version ==
 
== Version ==
This page describes the concept of [[UDI]] as used in the [[Context Data Model 1.1]].
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This page describes the concept of [[UDI]] as used in the [[Context Data Model 1.0]].
  
 
== Description ==
 
== Description ==
* [[UDI]]s identifiy [[Context]]s, [[Entity | Entities]] and [[Attribute]] s
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* The datatype of [[EntityId]]s, [[ContextId]]s and [[Attribute]]s
* A [[UDI]] is a kind of URI
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* A kind of string.  
* [[ContextId]] and [[EntityId]] [[Attribute]]s are [[UDI]]s.
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* May be a URI or XRI.
* Two broad classes of [[UDI]]s will be supported in Higgins 1.1:
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* For more information see: http://www.azigo.com/company/dev/udi/
*# OpenID URIs that resolve to an XRDS document (OpenID 2.0 only)
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*# HTTP URIs or XRIs that resolve to an XRDS document containing a Higgins Service Endpoint. This endpoint holds the necessary metadata to access Higgins [[Context]]s and [[Entity | Entities]] using a variety of protocols.
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*# Semantic Web Linked Data HTTP Cool URIs (probably only the '303' redirect variant)
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* Some UDIs are global —they can be resolved to an object from anywhere on the internet
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** Objects identified with global UDIs can be interconnected together to form a global, distributed object graph called the [[HGG]]
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* Other UDIs are local — they can only be resolved within a LAN or perhaps on the local machine
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** Objects identified by local UDIs cannot be a part of the Global Graph
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[[Category:Higgins Data Model]]
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Latest revision as of 11:17, 25 June 2010

{{#eclipseproject:technology.higgins|eclipse_custom_style.css}}

Higgins logo 76Wx100H.jpg

Version

This page describes the concept of UDI as used in the Context Data Model 1.0.

Description

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