PDS_VERSION_ID        = PDS3
RECORD_TYPE           = STREAM

OBJECT                = TEXT
  PUBLICATION_DATE    = 2021-10-01
  NOTE                = "Description of contents of INDEX directory."
END_OBJECT            = TEXT
END

The INDEX directory contains an index table, INDEX.TAB, that lists
every data product in the archive. The index table is accompanied by a
PDS label, INDEX.LBL, that describes the format of the table.

The index table is an ASCII text file. Each line (record) in INDEX.TAB
contains information about a data product on this archive volume. The 
record includes the path and file name of the PDS label that describes the
data product. 

Each line in INDEX.TAB consists of a set of fixed-length fields
delimited by commas. INDEX.LBL tells the start byte, number of bytes,
and data type of each field. Character fields are enclosed in double
quotation marks (").

The file BROWINDEX.TAB in the INDEX directory is an index of every 
browse product on the archive volume. The browse index table is accompanied 
by a PDS label, BROWINDEX.TAB, that describes the format of the table. Like 
INDEX.TAB, it is an ASCII text file. Each line contains information 
about a browse product, including the path and file name of the PDS label 
that describes the browse product.