/usr/local/share/sgml/docbook/3.0/docbook.cat \
/usr/local/share/sgml/docbook/3.1/docbook.cat \
/usr/share/sgml/docbook/dtd/3.1/docbook.cat \
/usr/local/share/sgml/docbook/3.0/docbook.cat \
/usr/local/share/sgml/docbook/3.1/docbook.cat \
/usr/share/sgml/docbook/dtd/3.1/docbook.cat \