Changes between Version 92 and Version 93 of BluePrintVITA

Timestamp:

03/28/10 14:31:11 (15 years ago)

Author:

Dominic König

Comment:

--

BluePrintVITA

@@ -148 +148 @@
 === Presence ===
 
-Presence means 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'' location at ''that'' time.
+Presence means the fact, that an instance of a person 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'' location at ''that'' time.
 
-VITA applications record a presence log for each person entity. Each log entry is established through a recognition event, i.e. when the entity is recognized by a dedicated observer (human or automatic).
+VITA applications keep a presence log for each person entity. Each log entry is established through a recognition event, i.e. when the entity is recognized by a dedicated observer (human or automatic).
 
-Recognition might 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 for the record. Recognition can also happen explicitly, i.e. in response to observation requests. In such cases, the observation time and location determined by the request are used.
+Recognition might 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 for the record. Recognition can also happen explicitly, i.e. in response to observation requests. In such cases, the observation time and location are determined by the request.
 
 '''Location'''s in presence records represent geospatial features, which can basically be of any valid feature class (points, polygons, lines etc.). Where references to locations are used, they must be universally unique and resolvable; otherwise the referred geospatial information have to be enclosed in the database and/or communication.