Extract resource with the URI of the root-level element in the message

The identity of the requested resource is extracted from the namespace of the root-level application element.

For following example shows the root-level element in bold.

<?xml version="1.0" encoding="UTF-8"?>
<S11:Envelope
   xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/"
   xmlns:S11="http://schemas.xmlsoap.org/soap/envelope/">
  <S11:Header>...</S11:Header>
  <S11:Body>...</S11:Body>
</S11:Envelope>