<?xml version="1.0" encoding="UTF-8"?>
<xs:schema targetNamespace="http://www.ivoa.net/xml/RegistryInterface/v1.0" 
           xmlns:ri="http://www.ivoa.net/xml/RegistryInterface/v1.0"
           xmlns="http://www.w3.org/2001/XMLSchema" 
           xmlns:xs="http://www.w3.org/2001/XMLSchema" 
           xmlns:vr="http://www.ivoa.net/xml/VOResource/v1.0" 
           elementFormDefault="qualified"
           version="1.0">
           
   <xs:import namespace="http://www.ivoa.net/xml/VOResource/v1.0"
   	schemaLocation="http://docs.g-vo.org/schemata/VOResource.xsd"/>
     
   <xs:element name="VOResources">
      <xs:annotation>
         <xs:documentation>
           a container for one or more resource descriptions or
           identifier references to resources.
         </xs:documentation>
         <xs:documentation>
           This is used to transmitting multiple resource descriptions
           resulting from a query.
         </xs:documentation>
      </xs:annotation>

      <xs:complexType>
         <xs:sequence>
            <xs:choice>
               <xs:element ref="ri:Resource"
                           minOccurs="0" maxOccurs="unbounded"/>
               <xs:element name="identifier" type="vr:IdentifierURI" 
                           minOccurs="0" maxOccurs="unbounded"/>
             </xs:choice>
         </xs:sequence>
         <xs:attribute name="from" type="xs:positiveInteger" use="required" />
         <xs:attribute name="numberReturned" type="xs:positiveInteger" 
                       use="required" />
         <xs:attribute name="more" type="xs:boolean"  use="required" />
      </xs:complexType>
   </xs:element>
   
   <xs:element name="Resource" type="vr:Resource">
      <xs:annotation>
         <xs:documentation>
           a description of a single resource
         </xs:documentation>
      </xs:annotation>
   </xs:element>
   
</xs:schema>
