<?xml version="1.0"?>
<rules xmlns="http://purl.oclc.org/dsdl/nvdl/ns/structure/1.0"
       startMode="book">
   <mode name="book">
       <namespace ns="http://www.books.com">
           <validate schema="Book.rng" useMode="NYTimes" />
       </namespace>
   </mode>
   <mode name="NYTimes">
       <namespace ns="http://www.nytimes.com">
           <validate schema="NYTimes.xsd"/>
       </namespace>
   </mode>
</rules>
