<xs:schema 
  targetNamespace="http://www.w3.org/2009/02/ws-evt" 
  xmlns:tns="http://www.w3.org/2009/02/ws-evt"
  xmlns:wsa="http://schemas.xmlsoap.org/ws/2004/08/addressing"
  xmlns:xs="http://www.w3.org/2001/XMLSchema" 
  elementFormDefault="qualified" 
  blockDefault="#all">
  
  <xs:import 
    namespace="http://www.w3.org/XML/1998/namespace" 
    schemaLocation="http://www.w3.org/2001/xml.xsd" />
  <xs:import
    namespace="http://schemas.xmlsoap.org/ws/2004/08/addressing"
    schemaLocation="http://schemas.xmlsoap.org/ws/2004/08/addressing" />
 
  <!-- Types and global elements -->
  <xs:complexType name="DeliveryType" mixed="true">
    <xs:sequence>
      <xs:any namespace="##any" processContents="lax" 
              minOccurs="0" maxOccurs="unbounded" />
    </xs:sequence>
    <xs:attribute name="Mode" type="xs:anyURI" use="optional" />
    <xs:anyAttribute namespace="##other" processContents="lax" />
  </xs:complexType>
 
  <xs:simpleType name="NonNegativeDurationType">
    <xs:restriction base="xs:duration">
      <xs:minInclusive value="P0Y0M0DT0H0M0S" />
    </xs:restriction>
  </xs:simpleType>
 
  <xs:simpleType name="ExpirationType">
      <xs:union memberTypes="xs:dateTime 
                tns:NonNegativeDurationType" />
  </xs:simpleType>
 
  <xs:complexType name="FilterType" mixed="true">
    <xs:sequence>
      <xs:any namespace="##other" processContents="lax" 
              minOccurs="0" maxOccurs="unbounded" />
    </xs:sequence>
    <xs:attribute name="Dialect" type="xs:anyURI" use="optional" />
    <xs:anyAttribute namespace="##other" processContents="lax" />
  </xs:complexType>
 
  <xs:complexType name="LanguageSpecificStringType">
    <xs:simpleContent>
      <xs:extension base="xs:string">
        <xs:attribute ref="xml:lang" />
        <xs:anyAttribute namespace="##other" processContents="lax" />
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
 
  <xs:element name="NotifyTo" type="wsa:EndpointReferenceType" />
 
  <!-- Subscribe request -->
  <xs:element name="Subscribe">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="EndTo" type="wsa:EndpointReferenceType" 
                    minOccurs="0" />
        <xs:element name="Delivery" type="tns:DeliveryType" />
        <xs:element name="Expires" type="tns:ExpirationType" 
                    minOccurs="0" />
        <xs:element name="Filter" type="tns:FilterType" 
                    minOccurs="0" />
        <xs:any namespace="##other" processContents="lax" 
                minOccurs="0" maxOccurs="unbounded" />
      </xs:sequence>
      <xs:anyAttribute namespace="##other" processContents="lax" />
    </xs:complexType>
  </xs:element>
 
  <xs:element name="Identifier" type="xs:anyURI" />
 
  <!-- Subscribe response -->
  <xs:element name="SubscribeResponse">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="SubscriptionManager" 
                    type="wsa:EndpointReferenceType" />
        <xs:element name="Expires" type="tns:ExpirationType" />
        <xs:any namespace="##other" processContents="lax" 
                minOccurs="0" maxOccurs="unbounded" />
      </xs:sequence>
      <xs:anyAttribute namespace="##other" processContents="lax" />
    </xs:complexType>
  </xs:element>
 
  <!-- Used in a fault if there's an unsupported dialect -->
  <xs:element name="SupportedDialect" type="xs:anyURI" />
 
  <!-- Used in a fault if there's an unsupported delivery mode -->
  <xs:element name="SupportedDeliveryMode" type="xs:anyURI" />
 
  <!-- Renew request -->
  <xs:element name="Renew">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="Expires" type="tns:ExpirationType" 
                    minOccurs="0" />
        <xs:any namespace="##other" processContents="lax" 
                minOccurs="0" maxOccurs="unbounded" />
      </xs:sequence>
      <xs:anyAttribute namespace="##other" processContents="lax" />
    </xs:complexType>
  </xs:element>
 
  <!-- Renew response -->
  <xs:element name="RenewResponse">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="Expires" type="tns:ExpirationType" 
                    minOccurs="0" />
        <xs:any namespace="##other" processContents="lax" 
                minOccurs="0" maxOccurs="unbounded" />
      </xs:sequence>
      <xs:anyAttribute namespace="##other" processContents="lax" />
    </xs:complexType>
  </xs:element>
 
  <!-- GetStatus request -->
  <xs:element name="GetStatus">
    <xs:complexType>
      <xs:sequence>
        <xs:any namespace="##other" processContents="lax" 
                minOccurs="0" maxOccurs="unbounded" />
      </xs:sequence>
      <xs:anyAttribute namespace="##other" processContents="lax" />
    </xs:complexType>
  </xs:element>
 
  <!-- GetStatus response -->
  <xs:element name="GetStatusResponse">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="Expires" type="tns:ExpirationType" 
                    minOccurs="0" />
        <xs:any namespace="##other" processContents="lax" 
                minOccurs="0" maxOccurs="unbounded" />
      </xs:sequence>
      <xs:anyAttribute namespace="##other" processContents="lax" />
    </xs:complexType>
  </xs:element>
 
  <!-- Unsubscribe request -->
  <xs:element name="Unsubscribe">
    <xs:complexType>
      <xs:sequence>
        <xs:any namespace="##other" processContents="lax" 
                minOccurs="0" maxOccurs="unbounded" />
      </xs:sequence>
      <xs:anyAttribute namespace="##other" processContents="lax" />
    </xs:complexType>
  </xs:element>
 
  <!-- count(/s:Envelope/s:Body/*) = 0 for Unsubscribe response -->
 
  <!-- SubscriptionEnd message -->
  <xs:element name="SubscriptionEnd">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="SubscriptionManager" 
                    type="wsa:EndpointReferenceType" />
        <xs:element name="Status"
                    type="tns:OpenSubscriptionEndCodeType" />
        <xs:element name="Reason" 
                    type="tns:LanguageSpecificStringType" 
                    minOccurs="0" maxOccurs="unbounded" />
        <xs:any namespace="##other" processContents="lax" 
                minOccurs="0" maxOccurs="unbounded" />
      </xs:sequence>
      <xs:anyAttribute namespace="##other" processContents="lax" />
    </xs:complexType>
  </xs:element>
 
  <xs:simpleType name="SubscriptionEndCodeType">
    <xs:restriction base="xs:anyURI">
      <xs:enumeration value=
  "http://www.w3.org/2009/02/ws-evt/DeliveryFailure" />
      <xs:enumeration value=
  "http://www.w3.org/2009/02/ws-evt/SourceShuttingDown" />
      <xs:enumeration value=
  "http://www.w3.org/2009/02/ws-evt/SourceCancelling" />
    </xs:restriction>
  </xs:simpleType>
 
  <xs:simpleType name="OpenSubscriptionEndCodeType">
    <xs:union memberTypes="tns:SubscriptionEndCodeType xs:anyURI" />
  </xs:simpleType>
 
  <xs:attribute name="EventSource" type="xs:boolean" />
</xs:schema>