This directory contains a cumulative index table (CUM_INDX.TAB) which describes
the location of all files on the PV10 collection (PVO-ORPA).
In addition, there is a file (INDEX.TAB) which gives the name, associated
dataset and location of all files on this volume. These index files have been
provided for database users who do not wish to make use of the DITDOS
file management system. 

The files are ASCII tables whose columns are comma separated which
should facilitate loading into most spreadsheet or database programs. They
are accompanied by a label and format file.

    key files:
        CUM_INDX.TAB - contains a cumulative index for the PV10 volume set.
        CUM_INDX.LBL - describes the columns and format of CUM_INDX.TAB
        INDEX.TAB - contains an index of this volume (PV10_0001)
        INDEX.LBL - describes the columns and format of INDEX.TAB
        INDEX.FMT - describes the columns and column formats
        INDXINFO.TXT - describes the contents of this directory