update-catalog [options] --add centralized_catalog ordinary_catalog
update-catalog [options] --remove centralized_catalog ordinary_catalog
update-catalog [options] --update-super
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 SUPER CATALOG for details on the generation process.
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.
Ardo van Rangelrooij <firstname.lastname@example.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.