This directory contains a single file (CATALOG.CAT) which contains all of
the metadata associated with this CD-ROM. The metadata is organized into
hierarchical templates which can be loaded into a relational database. The
component templates have been arranged in this file from the most general to 
most specific, thus the first portion of the file contains mission and 
spacecraft related metadata; and then the coordinate, instrument, dataset,
and dataset parameter templates. Each template is separated by a string
of '=' for ease of searching the CATALOG.CAT file with an editor.

Template         Contents
_____________________________________________________________
mission          describes the Pioneer Venus mission
spacecraft       describes the Pioneer Venus Orbiter component of the mission
coordinate       describes the coordinate systems (if any).
instrument       describes the instrument
dataset          describes a PDS dataset
parameter        describes instrument and dataset parameters