1<?xml version="1.0"?> 2<!DOCTYPE catalog PUBLIC "-//OASIS//DTD Entity Resolution XML Catalog V1.0//EN" "http://www.oasis-open.org/committees/entity/release/1.0/catalog.dtd"> 3<catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog"> 4<delegateSystem systemIdStartString="http://example.org/a" 5 catalog="a.example.org.xml"/> 6<delegateSystem systemIdStartString="http://example.org/b" 7 catalog="b.example.org.xml"/> 8<nextCatalog catalog="c.example.org.xml"/> 9</catalog> 10