PDS_VERSION_ID        = PDS3
RECORD_TYPE           = STREAM
OBJECT                = TEXT
  PUBLICATION_DATE    = 2016-05-06
  NOTE                = "Description of the DOCUMENT directory contents
                         for MDIS CDR/RDR data archive volumes."
END_OBJECT            = TEXT
END

=====================================================================
INTRODUCTION
=====================================================================

The DOCUMENT directory contains documentation that is considered to
be either necessary or useful for users to understand the archive
data set. Documents may be included in multiple forms (PDF, MS
Word, HTML with image file pointers, etc.). Included are the
following documents.

The DOCUMENT directory also contains a subdirectory, IMAGES, that 
contains image files that are used by some document formats to display 
visual and complex information.

=====================================================================
DOCUMENT DIRECTORY
=====================================================================

DOCINFO.TXT: Identifies and describes the function of each file in
the DOCUMENT directory. (This File)

MDIS_CDR_RDRSIS.PDF:  The MDIS CDR/RDR SIS: "MESSENGER MDIS CDR/RDR
SOFTWARE INTERFACE SPECIFICATION" in Adobe Acrobat format.  Note
that, in contrast to the .HTM version, the illustrations, tables,
etc. will display appropriately.

MDIS_CDR_RDRSIS.DOC: The MDIS CDR/RDR SIS: "MESSENGER MDIS CDR/RDR
SOFTWARE INTERFACE SPECIFICATION" in Microsoft Word format.

MDIS_CDR_RDRSIS.HTM: The MDIS CDR/RDR SIS: "MESSENGER MDIS CDR/RDR
SOFTWARE INTERFACE SPECIFICATION" in HTML format.

MDIS_CDR_RDRSIS.LBL: The detached label for the various MDIS CDR/RDR
SIS files.

PDSDD.FUL: The PDS Data Dictionary that includes definitions of all
keywords used in MESSENGER data labels, including MESSENGER-specific
keywords (i.e. the MESSENGER Local Data Dictionary). This is a text
file that is human-readable and also usable as input to PDS label
validation software.

Please note the following:

   PDSDD.IDX: Not included in the archive. The data dictionary index 
   file is platform and configuration dependent, therefore it is not
   included in the archive and must be generated by the user using the
   MAKE_INDEX program. This program can be obtained from the PDS 
   software download page at:
   
                 http://pds/tools/software_download.cfm.

   PDSDD.LBL: Not included in the archive. The PDS data dictionary,
   like a catalog file, only contains PDS objects, and thus does not
   require a label.

=====================================================================
IMAGES DIRECTORY
=====================================================================

imageNNN.jpg: JPEG images referenced by the HTML documents. NNN is a
number used to distinguish the files.

imageNNN.gif: GIF images referenced by the HTML documents. NNN is a
number used to distinguish the files.


The instrument paper:

  Hawkins, S. E., III, J. Boldt, E. H. Darlington (all at JHU/APL), R.
  Espiritu (ACT), R. E. Gold, B. Gotwols, M. Grey (both at JHU/APL), C.
  Hash (ACT), J. Hayes, S. Jaskulek, C. Kardian, M. Keller (all at
  JHU/APL), E. Malaret (ACT), S. L. Murchie, P. Murphy, K. Peacock, L.
  Prockter, A. Reiter (all at JHU/APL), M. S. Robinson (Northwestern
  Univ.), E. Schaefer, R. Shelton, R. Sterner, H. Taylor (all at
  JHU/APL), T. Watters (NASM), and B. Williams (JHU/APL), The Mercury
  Dual Imaging System on the MESSENGER spacecraft, Space Science
  Reviews, 131, 247-338, 2007. [HAWKINSETAL2007]

should be consulted in conjunction with using data in this archive.