About the Unified Communications Enhanced Presence Schema

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The Unified Communications Enhanced Presence Schemas define the data model describing the presence data used by Microsoft Office Communications Server 2007, Microsoft Office Communicator 2007, and Microsoft Office Communicator Web Access 2007. The term enhanced presence implies that the presence data is represented by category instances, which are values of a new data type introduced in the current version of the Microsoft unified communication system. The enhanced presence model allows a user, also known as a presentity, to exercise a finer control to publish the presence information. Unified Communications clients, other than Communicator, need to understand these presence data types if they are to interoperate with Communicator.

The enhanced presence schemas are exposed by the Microsoft unified communications application framework that supports various APIs, including Unified Communications Managed API, Unified Communications Client API, Unified Communications AJAX Service API, and Office Communicator Automation API. Unified Communications Client API and Communicator Automation API encapsulate the presence data with dedicated API entities or expose the features in method calls. Unified Communications AJAX Service API and Unified Communications Managed API, on the other hand, require the application to explicitly construct or parse at least some presence data as XML blobs.

In This Section

• Terminology of Enhanced Presence
  Terms used to describe enhanced presence in the Unified Communications

• Presence and Enhanced Presence
  Describes presence in general and summarizes the rich features of the enhanced presence supported by the Unified Communications application framework

• Enhanced Presence System
  Describes the enhanced presence system architecture, the mechanism of publication and subscription of enhanced presence, enhanced presence states, and the state aggregation when a presentity is present using multiple endpoints

• XML DOM of the Enhanced Presence Schema
  Describes the enhanced presence data in the form of the XML document object model

• XSD Files of the Enhanced Presence Schema
  Describes the XML schema definition (XSD) files for the enhanced presence schemas

See Also

Concepts

Using the Unified Communications Enhanced Presence Schema
Unified Communications Enhanced Presence Schema Reference