simple61-presence-data-model----Page:8
1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22 

One Element vs. Many
Resolving conflicts at watcher requires meta-data
Source
Timestamps
Should solve problem holistically
In the model of a presentity, multiple conflicting data is not a first class citizen
Conflicts complicate things like

PPT Version