PDS_VERSION_ID                = PDS3
RECORD_TYPE                   = STREAM
OBJECT                        = TEXT
  PUBLICATION_DATE            = 1997-06-20
  NOTE                        = "Description of the INDEX
     directory contents for the Viking Lander EDR image archive"
END_OBJECT                    = TEXT
END


                    INDEX Directory Contents

     The INDEX directory contains tabular index files,
accompanied by detached PDS labels, intended for database use.
The following files are found in this directory.

INDXINFO.TXT - The file you are reading.

INDEX.LBL -    Detached PDS label for INDEX.TAB.

INDEX.TAB -    Index table for the current Viking Lander EDR
               image archive volume.

CUMINDEX.LBL - Detached PDS label for CUMINDEX.TAB.

CUMINDEX.TAB - Cumulative index table for the Viking Lander 1 and
               2 EDR image archive volumes.


              Notes on Using the Image Index Tables

     The index and cumulative index tables in this directory
contain one row (record) for each image in the Viking Lander EDR
image archive.  The INDEX.TAB file lists images on this CD-ROM
volume, whereas the CUMINDEX.TAB file lists all images from both
CD-ROM volumes in this archive.  The tables are formatted so that
they can be read directly into many data management systems.  All
fields are separated by commas, and character fields are enclosed
in double quotation marks (").  Character fields are left
justified, and numeric fields are right justified.  Each record
ends with ASCII carriage return and line feed characters.  This
allows the table to be treated as a fixed length record file on
computers that support this file type and as a normal text file
on other computers.

     The files INDEX.LBL and CUMINDEX.LBL are PDS label files
that describe the content and structure of the fields in the
index tables, including field name, format, and description.  The
values for start byte and number of bytes listed in the label
file do not include commas between fields or quotation marks
surrounding character fields.