kamailio/doc/docbook/catalog.xml

<?xml version="1.0"?>
<!DOCTYPE catalog PUBLIC "-//OASIS//DTD Entity Resolution XML Catalog V1.0//EN"
         "http://www.oasis-open.org/committees/entity/release/1.0/catalog.dtd">
<catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog" prefer="public">
	<!-- Uncomment the following entry if you have docbook DTDs in unusual
	     location or if you would like to validate the documentation against
	     newer docbook version -->
	<!--
	<public publicId="-//OASIS//DTD DocBook XML V4.3//EN"
            uri="file:///home/janakj/docbook/dtd/docbookx.dtd"/>
      -->

    <!-- Uncomment the following entry if you have docbook XSL stylesheets in
         unusual location, the value of rewritePrefix parameter should point
         to the top level directory of your XSL stylesheets -->
    <!--
    <rewriteURI uriStartString="http://docbook.sourceforge.net/release/xsl/current/"
                rewritePrefix="file:///home/janakj/docbook/xsl/"/>
      -->

    <!-- Try the system wide catalogs as the last step before reverting to
         using the value of system identifiers and URI references from the
         documents being processed (they usually contain HTTP URIs). -->
    <delegatePublic publicIdStartString="" catalog="file:///etc/xml/catalog"/>
    <delegateURI    uriStartString=""      catalog="file:///etc/xml/catalog"/>

    <!-- If xsltproc gets here while searching the catalog then no entry was
         found in the catalog files for the requested resource and in this
         case xsltproc will attempt to download the resource from the internet
         using the HTTP protocol. It will use the HTTP URIs from system
         identifiers and URI references (therefore the XSL customization
         stylesheets in SR refer to the original XSL stylesheets using HTTP
         URIs). Note: Downloading DTDs and XSL stylesheets can be very slow,
         because each file will be downloaded several times, xsltproc does not
         cache downloaded files.
      -->
</catalog>