Overlapping valid time (1)
Overlapping in the same object
- Default no overlapping
- Usage of the overlaps keyword to specify that there may be overlapping valid time timestamps in the same object
- Overlapping valid time timestamps in the same object are used mainly for statistics reasons
Overlapping for objects in the same extent
- Three kinds of overlapping
- They are defined using special keywords in key definition
- Inter-object period: Two objects may have the same value at one of their instance properties and overlapping valid time timestamps as long as the timestamps are not exactly the same. Keyword used: period