DocBook to LaTeX XSL stylesheets

there is a simple way to handle xml catalog in Debian:

sudo xmlcatalog --noout --add delegateSystem
http://db2latex.sourceforge.net/xsl/ file:///etc/xml/db2latex-xsl.xml
/etc/xml/catalog

sudo xmlcatalog --noout --add delegateURI
http://db2latex.sourceforge.net/xsl/ file:///etc/xml/db2latex-xsl.xml
/etc/xml/catalog

sudo xmlcatalog --noout --add rewriteURI
http://db2latex.sourceforge.net/xsl/
file:///usr/share/sgml/docbook/stylesheet/xsl/db2latex/latex/
/etc/xml/db2latex-xsl.xml

sudo xmlcatalog --noout --add rewriteSystem
http://db2latex.sourceforge.net/xsl/
file:///usr/share/sgml/docbook/stylesheet/xsl/db2latex/latex/
/etc/xml/db2latex-xsl.xml

So, it might be putted (without the sudo) in the preinst/postinst package
scripts

However, I didn't test case for --del, but I think it is simple, too.