<?xml version="1.0"?>
<rules xmlns="http://purl.oclc.org/dsdl/nvdl/ns/structure/1.0"
       startMode="camera">
     <mode name="camera">
         <namespace ns="http://www.camera.org">
             <validate schema="Camera.xsd">
                 <context path="/camera/features" useMode="features" />
                 <context path="/camera/suppliers"  useMode="suppliers" />
             </validate>
         </namespace>
     </mode>
     <mode name="features">
         <namespace ns="http://www.nikon.com">
             <validate schema="Nikon.xsd" />
         </namespace>
         <namespace ns="http://www.olympus.com">
             <validate schema="Olympus.xsd" />
         </namespace>
         <namespace ns="http://www.pentax.com">
             <validate schema="Pentax.xsd" />
         </namespace>
     </mode>
     <mode name="suppliers">
        <namespace ns="http://www.hunts-camera.com">
            <validate schema="Hunts.xsd" />
        </namespace>
     </mode>
</rules>