Changes between Version 22 and Version 23 of BluePrintVITA


Ignore:
Timestamp:
12/23/09 17:59:22 (12 years ago)
Author:
Dominic König
Comment:

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  • BluePrintVITA

    v22 v23  
    2222=== Presence ===
    2323
     24Presence is the fact, that an entity is physically there at a particular location at a particular time. This abstract construction covers even cases of explicit absence, i.e. when the entity is not present at that time at that location.
     25
     26A presence is established through a recognition event, that is when the entity is recognized by a dedicated observer (human or automatic).
     27
     28Recognition can happen implicitly, e.g. when other data are obtained directly from the entity. In these cases, the time and location of the observer are used to establish a presence.
     29
     30Recognition can happen explicitly, i.e. in response to observation requests. In these cases, the time and location as determined by the request are used to establish a presence. Explicit recognition events may lead to establishment of explicit absence (=this one not here now).
    2431=== Identity ===
    2532