***** FILE INDXINFO.TXT
This information file is located in the INDEX directory.
This file contains a description of the index files located in the INDEX
directory and a subdirectory, NETABLES. Within INDEX there are 4 indices.
Within the NETABLES subdirectory there are 20 indices from the so-called
"printed archive," and 6 indices that are Discipline-specific and contain a
large fraction of all FITS keywords from those Disciplines. The 4 indices in
this directory are described below; the 26 indices in the NETABLES
subdirectory are described in the NETINFO.TXT file located in that
subdirectory.
CDSTRUCT -- The CD-ROM structure file contains the filename of all
files on this CD-ROM, along with file size, starting
block, allocation, and the complete path for this disc.
EPHEM -- The Ephemeris file contains the complete ephemeris data
for the period from November 26, 1981 through June 23,
1989.
PATHTABL -- The Path Table file contains complete path information
for all of the datafiles, headers, and labels for this
disc.
QUIK -- The Quick Look file contains the values, in chronological
order, of the IHW mandatory keywords for all Disciplines
for this disc.
Each of the indices mentioned above, as well as the ones within the
NETABLES subdirectory, are made up of 5 files as described below.
*.DBF - These are dBASE III+ compatible database files. They do not
contain any data records, only the structure of the
corresponding database. The data records may be appended from
the data tables (in the .IDX files). Many database management
systems can import databases from .DBF files.
*.IDX - These files contain the actual data records from each table.
They are delimited tables. Numeric fields are delimited by
commas (,) and ASCII text fields are contained in quotes (")
and also delimited with commas. Each line ends with the
characters <CR><LF> (ASCII 13 and 10 respectively). All fields
in the tables are fixed width to facilitate their use in that
format, as well. These files may be appended to the end of an
empty database structure to create the full index database.
*.HDR - These are the FITS headers describing the *.IDX files in terms
of FITS tables. By concatenating the *.HDR and *.IDX files
into one file a true FITS table byte stream could be
generated.
*.LBL - These are PDS labels describing the data tables. They already
contain pointers to the data tables, so no further steps are
required to make them accessible to PDS table-processing
software.
*.STR - These are "structure" files. They contain information, in
delimited format, on the number, names and widths of the
fields in each database. They can used by dBASE III for
creating the printed archive index tables, and also document
the structure of each table.
In order to use dBASE III to create a database from these files, issue
the following commands at the "." (dot) prompt:
. use <filename>
. append from <filename>.idx delimited
where <filename> is one of CDSTRUCT (a file of physcial sector locations),
EPHEM, NETABLES, QUIK* or PATHTABL. Most database programs can import dBASE
III compatible files. In order to use another database program to manage the
index tables, you will need to import the (empty) index from the appropriate
.DBF file, then append the data from the corresponding .IDX file.
There is one additional file in the INDEX directory. STRUCT.DBF is the
database used to create all the other databases. It consists of 4 fields,
FIELD_NAME, FIELD_TYPE, FIELD_LEN and FIELD_DEC, which document the structure
of the index tables. When the appropriate .STR file is appended to this
structure database, dBASE III+ can create the corresponding index database.