xml catalog example
<?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">
<system
systemId="http://www.oasis-open.org/docbook/xml/4.5/"
uri="file:///usr/share/xml/docbook45/" />
<uri
name="http://docbook.sourceforge.net/release/xsl/current/html/docbook.xsl"
uri="file:///usr/share/xml/docbook-xsl-1.73.1/html/docbook.xsl" />
<uri
name="http://docbook.sourceforge.net/release/xsl/current/html/chunk.xsl"
uri="file:///usr/share/xml/docbook-xsl-1.73.1/html/chunk.xsl" />
</catalog>