SOAP Faults

• All faults need to be reported in a single Fault element within Body.
• It contains a faultcode and faultstring sub-elements which must appear.
• The contents of faultcode is a QName from XMLSchema. The faultstring's content is a human-readable string.

<?xml version='1.0' ?>
<env:Envelope xmlns:env="http://www.w3.org/2001/12/soap-envelope"
  xmlns:f='http://www.w3.org/2001/12/soap-faults'>
  <env:Body>
    <env:Fault>
      <faultcode>env:Receiver</faultcode>
      <faultstring>Processing Error</faultstring>
      <detail>
        <e:myfaultdetails xmlns:e="http://example.org/faults">
          <message>Name does not match card number</message>
          <errorcode>999</errorcode>
        </e:myfaultdetails>
      </detail>
    </env:Fault>
  </env:Body>
</env:Envelope>

• The soap-envelope schema defines the faultcodes: VersionMismatch, MustUnderstand, DTDNotSupported, DataEncodingUnknown, Sender, Receiver.
• A MustUnderstand fault should also include information about which element was not understood.