SOAP message containing binary parts

<soap:Envelope
    xmlns:soap='http://www.w3.org/2003/05/soap-envelope' 
    xmlns:xmlmime='http://www.w3.org/2004/11/xmlmime'>
  <soap:Body>
    <m:data xmlns:m='http://example.org/stuff'>
      <!-- Two binary components: a photo and a signature -->
      <m:photo>/aWKKapGGyQ=</m:photo>
      <m:sig>Faa7vROi2VQ=</m:sig>
    </m:data>
  </soap:Body>
</soap:Envelope>