xmlcatalog (return code: 1)
Usage : xmlcatalog [options] catalogfile entities...
Parse the catalog file and query it for the entities
--sgml : handle SGML Super catalogs for --add and --del
--shell : run a shell allowing interactive queries
--create : create a new catalog
--add 'type' 'orig' 'replace' : add an XML entry
--add 'entry' : add an SGML entry
--del 'values' : remove values
--noout: avoid dumping the result on stdout
used with --add or --del, it saves the catalog changes
and with --sgml it automatically updates the super catalog
--no-super-update: do not update the SGML super catalog
-v --verbose : provide debug informations