Install DocBook XML DTD by running the following commands: install -d /usr/share/xml/docbook/xml-dtd-&DocBook-version; && cp -af docbook.cat *.dtd ent/ *.mod /usr/share/xml/docbook/xml-dtd-&DocBook-version; && if [ ! -e /etc/xml/catalog ]; then mkdir -p /etc/xml; xmlcatalog --noout \ --create /etc/xml/catalog; fi && if [ ! -e /etc/xml/docbook ]; then xmlcatalog --noout --create \ /etc/xml/docbook; fi && xmlcatalog --noout --add "public" \ "-//OASIS//ELEMENTS DocBook XML Information Pool V&DocBook-version;//EN" \ "file:///usr/share/xml/docbook/xml-dtd-&DocBook-version;/dbpoolx.mod" \ /etc/xml/docbook && xmlcatalog --noout --add "public" \ "-//OASIS//DTD DocBook XML V&DocBook-version;//EN" \ "http://oasis-open.org/docbook/xml/&DocBook-version;/docbookx.dtd" \ /etc/xml/docbook && xmlcatalog --noout --add "public" \ "-//OASIS//ENTITIES DocBook XML Character Entities V&DocBook-version;//EN" \ "file:///usr/share/xml/docbook/xml-dtd-&DocBook-version;/dbcentx.mod" \ /etc/xml/docbook && xmlcatalog --noout --add "public" \ "-//OASIS//ENTITIES DocBook XML Notations V&DocBook-version;//EN" \ "file:///usr/share/xml/docbook/xml-dtd-&DocBook-version;/dbnotnx.mod" \ /etc/xml/docbook && xmlcatalog --noout --add "public" \ "-//OASIS//ENTITIES DocBook XML Additional General Entities V&DocBook-version;//EN" \ "file:///usr/share/xml/docbook/xml-dtd-&DocBook-version;/dbgenent.mod" \ /etc/xml/docbook && xmlcatalog --noout --add "public" \ "-//OASIS//ELEMENTS DocBook XML Document Hierarchy V&DocBook-version;//EN" \ "file:///usr/share/xml/docbook/xml-dtd-&DocBook-version;/dbhierx.mod" \ /etc/xml/docbook && xmlcatalog --noout --add "public" \ "-//OASIS//DTD XML Exchange Table Model 19990315//EN" \ "file:///usr/share/xml/docbook/xml-dtd-&DocBook-version;/soextblx.dtd" \ /etc/xml/docbook && xmlcatalog --noout --add "public" \ "-//OASIS//DTD DocBook XML CALS Table Model V&DocBook-version;//EN" \ "file:///usr/share/xml/docbook/xml-dtd-&DocBook-version;/calstblx.dtd" \ /etc/xml/docbook && xmlcatalog --noout --add "rewriteSystem" \ "http://www.oasis-open.org/docbook/xml/&DocBook-version;" \ "file:///usr/share/xml/docbook/xml-dtd-&DocBook-version;" \ /etc/xml/docbook && xmlcatalog --noout --add "rewriteURI" \ "http://www.oasis-open.org/docbook/xml/&DocBook-version;" \ "file:///usr/share/xml/docbook/xml-dtd-&DocBook-version;" \ /etc/xml/docbook && xmlcatalog --noout --add "delegatePublic" \ "-//OASIS//ENTITIES DocBook XML" \ "file:///etc/xml/docbook" /etc/xml/catalog && xmlcatalog --noout --add "delegatePublic" \ "-//OASIS//DTD DocBook XML" \ "file:///etc/xml/docbook" /etc/xml/catalog && xmlcatalog --noout --add "delegateSystem" \ "http://www.oasis-open.org/docbook/" \ "file:///etc/xml/docbook" /etc/xml/catalog && xmlcatalog --noout --add "delegateURI" \ "http://www.oasis-open.org/docbook/" \ "file:///etc/xml/docbook" /etc/xml/catalog