1 Scope
This International Standard defines concepts for describing temporal characteristics
of geographic information. It depends upon existing information technology standards
for the interchange of temporal information. It provides a basis for defining temporal
feature attributes, feature operations, and feature associations, and for defining the temporal aspects of metadata about geographic
information. Since this International Standard is concerned with the temporal characteristics
of geographic information as they are abstracted from the real world, it emphasizes
valid time rather than transaction time.