update-catalog - create or update entry in SGML catalog file

       Ardo van Rangelrooij <ardo@debian.org>

       Copyright © 2001-2004 Ardo van Rangelrooij Copyright © 2012 Helmut Grohne

       This  is  free  software;  see  the GNU General Public Licence version 2 or later for copying conditions.
       There is no warranty.

Debian Project                                      June 2004                                  UPDATE-CATALOG(8)

update-catalog inserts, updates or removes entries in the SGML centralized catalogs located in /etc/sgml.
       To  change the SGML super catalog located in /etc/sgml/catalog modify the directory contents of /etc/sgml
       to contain new files or symbolic links having a .cat extension or remove (or move)  existing  centralized
       catalogs and regenerate the super catalog using the --update-super option.  See section SUPERCATALOG for
       details on the generation process.

       update-catalog - create or update entry in SGML catalog file

--add  Adds an entry for the ordinary_catalog in the centralized_catalog.

       --remove
              Removes the entry for the ordinary_catalog from the centralized_catalog.

       --update-super
              Regenerates  the  SGML  super  catalog  from the contents of the /etc/sgml directory.  See section
              SUPERCATALOG for details on the super catalog generation.

       --quiet
              Prevents the usual diagnostic output.

       --test Prevents the update of the catalog and writes the resulting SGML catalog to standard output.

       --version
              Displays the version information and exits.

       --help Display the usage information and exits.

       The super-catalog located in /etc/sgml/catalog cannot be directly  modified.   It  is  generated  by  the
       update-catalog--update-super  command.   The generation considers files in the /etc/sgml directory that
       have a .cat extension.  For instance files ending in .old or .disabled are not considered.  Before adding
       a catalog to the super catalog it is parsed and verified in order to not corrupt the super catalog.   All
       referenced  catalogs  are  verified  to actually exist.  If the check fails, a message is printed and the
       complete catalog is ignored.  This check ensures that a catalog from a package, which is removed but  not
       purged, is removed from the super catalog.

update-catalog [options] --addcentralized_catalogordinary_catalogupdate-catalog [options] --removecentralized_catalogordinary_catalogupdate-catalog [options] --update-super