Item 47: Catalog common resources
_<?xml version="1.0"?>
_<catalog xmlns=
_  "urn:oasis:names:tc:entity:xmlns:xml:catalog"
_>
_
_  <public publicId=
_     "-//OASIS//DTD DocBook XML V4.2//EN"
_          uri=
_   "file:///opt/xml/docbook/docbookx.dtd"/>
_
_</catalog>