How to write an XML Catalog
Since an XML Catalog follows the XML syntax, you can write XML Catalogs in XMLBlueprint. To create a new XML Catalog, choose File > New from Templates > XML Catalog > XML Catalog 1.1 (with XSD).
<?xml version="1.0" encoding="utf-8"?>
<catalog
xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog"
xmlns:xsi=http://www.w3.org/2001/XMLSchema-instance
xsi:schemaLocation="
urn:oasis:names:tc:entity:xmlns:xml:catalog
http://www.oasis-open.org/committees/entity/release/1.1/catalog.xsd">
</catalog>
You can now add an entry to the XML Catalog so that when an XML Document is associated with schema
<rewriteSystem
systemIdStartString=http://docs.oasis-open.org/dita/v1.0.1/dtd/
rewritePrefix="file:///C:/MyDTDs/docs.oasis-open.org/dita/v1.0.1/dtd/"/>