PDS_VERSION_ID          = PDS3 
RECORD_TYPE             = STREAM 
 
OBJECT                  = TEXT 
   INTERCHANGE_FORMAT   = ASCII 
   PUBLICATION_DATE     = 2000-01-15   
   NOTE                 = "N/A" 
END_OBJECT              = TEXT 
 
END 

There are three files in this subdirectory, /INDEX.

INDEX.TAB 
INDEX.TAB contains an index of files in all subdirectories under 
/DATA directory of this data set.

INDEX.LBL
INDEX.LBL contains the PDS label for the volume index, INDEX.TAB.
It identifies the volume index and describes the structure 
(columns) of the index table.

INDXINFO.TXT
This file.