What is presence information?

Presence Information

In computer and telecommunications networks, presence information is a status indicator that conveys ability and willingness of a potential communication partner—for example a user--to communicate. A user's client provides presence information (presence state) via a network connection to a presence service, which is stored in what constitutes his personal availability record (called a presentity) and can be made available for distribution to other users (called watchers) to convey his availability for communication. Presence information has wide application in many communication services and is one of the innovations driving the popularity of instant messaging or recent implementations of voice over IP clients.

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Some articles on presence information:

... The term presentity is a combination of two words - "presence" and "entity" ... It basically refers to an entity that has presence information associated with it information such as status, reachability, and willingness to communicate ... The term presentity is often used to refer to users who post and update their presence information through some kind of presence applications on their devices ...
Presence Information - Presence Standardization Efforts
... is, significant work done in several working groups on achieving a standardization for presence-related protocols ... Unfortunately, IMPP WG was not able to come to consensus on a single protocol for presence ... Instead it issued a common profile for presence and instant messaging (CPP) which defined semantics for common services of presence to facilitate the creation ...

Famous quotes containing the words information and/or presence:

    Information networks straddle the world. Nothing remains concealed. But the sheer volume of information dissolves the information. We are unable to take it all in.
    Günther Grass (b. 1927)

    The presence of a noble nature, generous in its wishes, ardent in its charity, changes the lights for us: we begin to see things again in their larger, quieter masses, and to believe that we too can be seen and judged in the wholeness of our character.
    George Eliot [Mary Ann (or Marian)