Moodle Opaque Wsdl - https://docs.moodle.org/dev/Open_protocol_for_accessing_question_engines

moodle-opaque.wsdl

<?xml version="1.0" encoding="UTF-8"?>
<wsdl:definitions targetNamespace="http://om.open.ac.uk/" xmlns:apachesoap="http://xml.apache.org/xml-soap" xmlns:impl="http://om.open.ac.uk/" xmlns:intf="http://om.open.ac.uk/" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns:wsdlsoap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
 <wsdl:types>
  <schema targetNamespace="http://om.open.ac.uk/" xmlns="http://www.w3.org/2001/XMLSchema">
   <import namespace="http://schemas.xmlsoap.org/soap/encoding/"/>

   <complexType name="ArrayOf_soapenc_string">
    <complexContent>
     <restriction base="soapenc:Array">
      <attribute ref="soapenc:arrayType" wsdl:arrayType="soapenc:string[]"/>
     </restriction>
    </complexContent>
   </complexType>

   <complexType name="Resource">
    <sequence>
     <element name="content" nillable="true" type="soapenc:base64Binary"/>
     <element name="encoding" nillable="true" type="soapenc:string"/>
     <element name="filename" nillable="true" type="soapenc:string"/>
     <element name="mimeType" nillable="true" type="soapenc:string"/>
    </sequence>
   </complexType>

   <complexType name="ArrayOfResource">
    <complexContent>
     <restriction base="soapenc:Array">
      <attribute ref="soapenc:arrayType" wsdl:arrayType="impl:Resource[]"/>
     </restriction>
    </complexContent>
   </complexType>

   <complexType name="StartReturn">
    <sequence>
     <element name="CSS" nillable="true" type="soapenc:string"/>
     <element name="XHTML" nillable="true" type="soapenc:string"/>
     <element name="progressInfo" nillable="true" type="soapenc:string"/>
     <element name="questionSession" nillable="true" type="soapenc:string"/>
     <element name="resources" nillable="true" type="impl:ArrayOfResource"/>
    </sequence>
   </complexType>

   <complexType name="OmException">
    <sequence/>
   </complexType>

   <complexType name="CustomResult">
    <sequence>
     <element name="name" nillable="true" type="soapenc:string"/>
     <element name="value" nillable="true" type="soapenc:string"/>
    </sequence>
   </complexType>

   <complexType name="ArrayOfCustomResult">
    <complexContent>
     <restriction base="soapenc:Array">
      <attribute ref="soapenc:arrayType" wsdl:arrayType="impl:CustomResult[]"/>
     </restriction>
    </complexContent>
   </complexType>

   <complexType name="Score">
    <sequence>
     <element name="axis" nillable="true" type="soapenc:string"/>
     <element name="marks" type="xsd:int"/>
    </sequence>
   </complexType>

   <complexType name="ArrayOfScore">
    <complexContent>
     <restriction base="soapenc:Array">
      <attribute ref="soapenc:arrayType" wsdl:arrayType="impl:Score[]"/>
     </restriction>
    </complexContent>
   </complexType>

   <complexType name="Results">
    <sequence>
     <element name="actionSummary" nillable="true" type="soapenc:string"/>
     <element name="answerLine" nillable="true" type="soapenc:string"/>
     <element name="attempts" type="xsd:int"/>
     <element name="customResults" nillable="true" type="impl:ArrayOfCustomResult"/>
     <element name="questionLine" nillable="true" type="soapenc:string"/>
     <element name="scores" nillable="true" type="impl:ArrayOfScore"/>
    </sequence>
   </complexType>

   <complexType name="ProcessReturn">
    <sequence>
     <element name="CSS" nillable="true" type="soapenc:string"/>
     <element name="XHTML" nillable="true" type="soapenc:string"/>
     <element name="progressInfo" nillable="true" type="soapenc:string"/>
     <element name="questionEnd" type="xsd:boolean"/>
     <element name="resources" nillable="true" type="impl:ArrayOfResource"/>
     <element name="results" nillable="true" type="impl:Results"/>
    </sequence>
   </complexType>

  </schema>

 </wsdl:types>

   <wsdl:message name="getEngineInfoResponse">
      <wsdl:part name="getEngineInfoReturn" type="soapenc:string"/>
   </wsdl:message>

   <wsdl:message name="processRequest">
      <wsdl:part name="questionSession" type="soapenc:string"/>
      <wsdl:part name="names" type="impl:ArrayOf_soapenc_string"/>
      <wsdl:part name="values" type="impl:ArrayOf_soapenc_string"/>
   </wsdl:message>

   <wsdl:message name="getEngineInfoRequest">
   </wsdl:message>

   <wsdl:message name="getQuestionMetadataResponse">
      <wsdl:part name="getQuestionMetadataReturn" type="soapenc:string"/>
   </wsdl:message>

   <wsdl:message name="processResponse">
      <wsdl:part name="processReturn" type="impl:ProcessReturn"/>
   </wsdl:message>

   <wsdl:message name="stopResponse">
   </wsdl:message>

   <wsdl:message name="OmException">
      <wsdl:part name="fault" type="impl:OmException"/>
   </wsdl:message>

   <wsdl:message name="startResponse">
      <wsdl:part name="startReturn" type="impl:StartReturn"/>
   </wsdl:message>

   <wsdl:message name="stopRequest">
      <wsdl:part name="questionSession" type="soapenc:string"/>
   </wsdl:message>

   <wsdl:message name="getQuestionMetadataRequest">
      <wsdl:part name="questionID" type="soapenc:string"/>
      <wsdl:part name="questionVersion" type="soapenc:string"/>
      <wsdl:part name="questionBaseURL" type="soapenc:string"/>
   </wsdl:message>

   <wsdl:message name="startRequest">
      <wsdl:part name="questionID" type="soapenc:string"/>
      <wsdl:part name="questionVersion" type="soapenc:string"/>
      <wsdl:part name="questionBaseURL" type="soapenc:string"/>
      <wsdl:part name="initialParamNames" type="impl:ArrayOf_soapenc_string"/>
      <wsdl:part name="initialParamValues" type="impl:ArrayOf_soapenc_string"/>
      <wsdl:part name="cachedResources" type="impl:ArrayOf_soapenc_string"/>
   </wsdl:message>

   <wsdl:portType name="OmService">

      <wsdl:operation name="start" parameterOrder="questionID questionVersion questionBaseURL initialParamNames initialParamValues cachedResources">
         <wsdl:input message="impl:startRequest" name="startRequest"/>
         <wsdl:output message="impl:startResponse" name="startResponse"/>
         <wsdl:fault message="impl:OmException" name="OmException"/>
      </wsdl:operation>

      <wsdl:operation name="stop" parameterOrder="questionSession">
         <wsdl:input message="impl:stopRequest" name="stopRequest"/>
         <wsdl:output message="impl:stopResponse" name="stopResponse"/>
         <wsdl:fault message="impl:OmException" name="OmException"/>
      </wsdl:operation>

      <wsdl:operation name="process" parameterOrder="questionSession names values">
         <wsdl:input message="impl:processRequest" name="processRequest"/>
         <wsdl:output message="impl:processResponse" name="processResponse"/>
         <wsdl:fault message="impl:OmException" name="OmException"/>
      </wsdl:operation>

      <wsdl:operation name="getEngineInfo">
         <wsdl:input message="impl:getEngineInfoRequest" name="getEngineInfoRequest"/>
         <wsdl:output message="impl:getEngineInfoResponse" name="getEngineInfoResponse"/>
      </wsdl:operation>

      <wsdl:operation name="getQuestionMetadata" parameterOrder="questionID questionVersion questionBaseURL">
         <wsdl:input message="impl:getQuestionMetadataRequest" name="getQuestionMetadataRequest"/>
         <wsdl:output message="impl:getQuestionMetadataResponse" name="getQuestionMetadataResponse"/>
         <wsdl:fault message="impl:OmException" name="OmException"/>
      </wsdl:operation>

   </wsdl:portType>

   <wsdl:binding name="OmSoapBinding" type="impl:OmService">
      <wsdlsoap:binding style="rpc" transport="http://schemas.xmlsoap.org/soap/http"/>

      <wsdl:operation name="start">
         <wsdlsoap:operation soapAction=""/>
         <wsdl:input name="startRequest">
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://om.open.ac.uk/" use="encoded"/>
         </wsdl:input>
         <wsdl:output name="startResponse">
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://om.open.ac.uk/" use="encoded"/>
         </wsdl:output>

         <wsdl:fault name="OmException">
            <wsdlsoap:fault encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" name="OmException" namespace="http://om.open.ac.uk/" use="encoded"/>
         </wsdl:fault>
      </wsdl:operation>

      <wsdl:operation name="stop">
         <wsdlsoap:operation soapAction=""/>
         <wsdl:input name="stopRequest">
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://om.open.ac.uk/" use="encoded"/>
         </wsdl:input>

         <wsdl:output name="stopResponse">
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://om.open.ac.uk/" use="encoded"/>
         </wsdl:output>
         <wsdl:fault name="OmException">
            <wsdlsoap:fault encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" name="OmException" namespace="http://om.open.ac.uk/" use="encoded"/>
         </wsdl:fault>
      </wsdl:operation>

      <wsdl:operation name="process">
         <wsdlsoap:operation soapAction=""/>
         <wsdl:input name="processRequest">
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://om.open.ac.uk/" use="encoded"/>
         </wsdl:input>
         <wsdl:output name="processResponse">
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://om.open.ac.uk/" use="encoded"/>
         </wsdl:output>
         <wsdl:fault name="OmException">
            <wsdlsoap:fault encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" name="OmException" namespace="http://om.open.ac.uk/" use="encoded"/>
         </wsdl:fault>
      </wsdl:operation>

      <wsdl:operation name="getEngineInfo">
         <wsdlsoap:operation soapAction=""/>
         <wsdl:input name="getEngineInfoRequest">
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://om.open.ac.uk/" use="encoded"/>
         </wsdl:input>
         <wsdl:output name="getEngineInfoResponse">
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://om.open.ac.uk/" use="encoded"/>
         </wsdl:output>
      </wsdl:operation>

      <wsdl:operation name="getQuestionMetadata">
         <wsdlsoap:operation soapAction=""/>
         <wsdl:input name="getQuestionMetadataRequest">
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://om.open.ac.uk/" use="encoded"/>
         </wsdl:input>
         <wsdl:output name="getQuestionMetadataResponse">
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://om.open.ac.uk/" use="encoded"/>
         </wsdl:output>
         <wsdl:fault name="OmException">
            <wsdlsoap:fault encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" name="OmException" namespace="http://om.open.ac.uk/" use="encoded"/>
         </wsdl:fault>
      </wsdl:operation>

   </wsdl:binding>

   <wsdl:service name="OmServiceService">
      <wsdl:port binding="impl:OmSoapBinding" name="Om">
         <wsdlsoap:address location="http://kestrel.open.ac.uk/om-qe/services/Om"/>
      </wsdl:port>
   </wsdl:service>

</wsdl:definitions>