Developing High Quality Data Models

17.4. Spatio-Temporal Extent and Class of Spatio-Temporal Extent

Figure 17-4 presents a data model for spatio_temporal_extent and class_of_spatio_temporal_extent . A spatio_temporal_extent is some arbitrary piece of space-time that is not necessarily contiguous and is part_of at least one possible_world . A spatio_temporal_extent may have a beginning event and an ending event (it will necessarily have both, but you will not necessarily know them).

Figure 17-4 HQDM_FRAMEWORK EXPRESS-G diagram 4 of 46.

A spatio_temporal_extent may be a member_of one or more class_of_spatio_temporal_extent , which in turn may be a member_of ...