<?xml version="1.0"?>
<rules xmlns="http://purl.oclc.org/dsdl/nvdl/ns/structure/1.0"
       startMode="soap">
     <mode name="soap">
         <namespace ns="http://schemas.xmlsoap.org/soap/envelope/">
             <validate schema="soap.xsd">
                 <context path="Body" useMode="book" />
             </validate>
         </namespace>
     </mode>
     <mode name="book">
         <namespace ns="http://www.books.org">
             <validate schema="Book.rng" />
             <attach />
         </namespace>
     </mode>
</rules>
