address.xsd

<?xml version='1.0' encoding='UTF-8'?>

<xs:schema
    xmlns:xs='http://www.w3.org/2001/XMLSchema'
    targetNamespace='http://jabber.org/protocol/address'
    xmlns='http://jabber.org/protocol/address'
    elementFormDefault='qualified'>

  <xs:annotation>
    <xs:documentation>
      The protocol documented by this schema is defined in
      XEP-0033: https://xmpp.org/extensions/xep-0033.html
    </xs:documentation>
  </xs:annotation>

  <xs:element name='addresses'>
     <xs:complexType>
        <xs:sequence>
           <xs:element ref='address'
                       minOccurs='1'
                       maxOccurs='unbounded'/>
        </xs:sequence>
     </xs:complexType>
  </xs:element>

  <xs:element name='address'>
    <xs:complexType>
      <xs:simpleContent>
        <xs:extension base='empty'>
          <xs:attribute name='delivered' use='optional' fixed='true'/>
          <xs:attribute name='desc' use='optional' type='xs:string'/>
          <xs:attribute name='jid' use='optional' type='xs:string'/>
          <xs:attribute name='node' use='optional' type='xs:string'/>
          <xs:attribute name='type' use='required'>
            <xs:simpleType>
              <xs:restriction base='xs:NCName'>
                <xs:enumeration value='bcc'/>
                <xs:enumeration value='cc'/>
                <xs:enumeration value='noreply'/>
                <xs:enumeration value='replyroom'/>
                <xs:enumeration value='replyto'/>
                <xs:enumeration value='to'/>
              </xs:restriction>
            </xs:simpleType>
          </xs:attribute>
          <xs:attribute name='uri' use='optional' type='xs:string'/>
        </xs:extension>
      </xs:simpleContent>
    </xs:complexType>
  </xs:element>

  <xs:simpleType name='empty'>
    <xs:restriction base='xs:string'>
      <xs:enumeration value=''/>
    </xs:restriction>
  </xs:simpleType>

</xs:schema>