This file was generated from ISO TC/211 UML class diagrams == 01-26-2005 12:40:04 ====== Time period covered by the content of the dataset Vertical domain of dataset Boundary enclosing the dataset expressed as the closed set of (x,y) coordinates of the polygon (last point replicates first point) Information about spatial, vertical, and temporal extent Geographic area of the dataset Geographic area of the entire dataset referenced to WGS 84 Extent with respect to date and time