<operation name="echoString" parameterOrder="inputString">
  <input message="tns:echoStringRequest" name="echoString" /> 
  <output message="tns:echoStringResponse" name="echoStringResponse" /> 
  </operation>

  <message name="echoStringRequest">
  <part name="inputString" type="xsd:string" /> 
  </message>
  <message name="echoStringResponse">
  <part name="return" type="xsd:string" /> 
  </message>

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