You need to use both mappings 
IN Mappings (Parameter Mapping in the IDE): this will copy your process variables to the work item scope 
and OUT Mappings (Result Mappings): this will copy the information created or modified by the work item (in this case a human task) to the process scope.

Greetings!

2010/11/15 matus <matus.majchrak@gmail.com>
Hi,

I recently run into some problems when trying to create a simple holiday request process. 
I defined process variables but I struggle to understand how to access them in Human Task. 
In my User Task ,,holiday approval" I have this as a description: #{employee} requested holiday for #{length} days 
I set both variables when I start the process and the result looks as expected, for example ,,John requested holiday fo 14 days.
But lets say I want a manager approving the holiday request to add his response as a variable. How do I do that?
I tried to use the Result mapping with someting like this: response=response but I get an error saying ,,There is no ID/IDREF binding for IDREF '_2_response'.
Also if I manage to get this running, how do I set this variable in a client app?[using WS_HT] 
I am sorry if I am asking realy basic things, but I realy need some advice.
Bellow is the process definition.
Thanks a lot, matus


<?xml version="1.0" encoding="UTF-8"?> 
<definitions id="Definition"
             targetNamespace="http://www.jboss.org/drools"
             typeLanguage="http://www.java.com/javaTypes"
             expressionLanguage="http://www.mvel.org/2.0"
             xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL"
             xmlns:xs="http://www.w3.org/2001/XMLSchema-instance"
             xs:schemaLocation="http://www.omg.org/spec/BPMN/20100524/MODEL BPMN20.xsd"
             xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI"
             xmlns:dc="http://www.omg.org/spec/DD/20100524/DC"
             xmlns:di="http://www.omg.org/spec/DD/20100524/DI"
             xmlns:tns="http://www.jboss.org/drools">

  <itemDefinition id="_employeeItem" structureRef="String" />
  <itemDefinition id="_lengthItem" structureRef="String" />
  <itemDefinition id="_managersItem" structureRef="String" />
  <itemDefinition id="_responseItem" structureRef="String" />

  <process processType="Private" isExecutable="true" id="com.sample.test" name="test process" tns:packageName="defaultPackage" >

    <!-- process variables -->
    <property id="employee" itemSubjectRef="_employeeItem"/>
    <property id="length" itemSubjectRef="_lengthItem"/>
    <property id="managers" itemSubjectRef="_managersItem"/>
    <property id="response" itemSubjectRef="_responseItem"/>

    <!-- nodes -->
    <startEvent id="_1" name="StartProcess" />
    <userTask id="_2" name="Holiday approval" >
      <ioSpecification>
        <dataInput id="_2_CommentInput" name="Comment" />
        <dataInput id="_2_SkippableInput" name="Skippable" />
        <dataInput id="_2_ContentInput" name="Content" />
        <dataInput id="_2_TaskNameInput" name="TaskName" />
        <dataInput id="_2_PriorityInput" name="Priority" />
        <dataOutput id="_2_responseOutput" name="response" />
        <inputSet>
          <dataInputRefs>_2_CommentInput</dataInputRefs>
          <dataInputRefs>_2_SkippableInput</dataInputRefs>
          <dataInputRefs>_2_ContentInput</dataInputRefs>
          <dataInputRefs>_2_TaskNameInput</dataInputRefs>
          <dataInputRefs>_2_PriorityInput</dataInputRefs>
        </inputSet>
        <outputSet>
          <dataOutputRefs>_2_responseOutput</dataOutputRefs>
        </outputSet>
      </ioSpecification>
      <dataInputAssociation>
        <targetRef>_2_CommentInput</targetRef>
        <assignment>
          <from xs:type="tFormalExpression">#{employee} requested holiday for #{length} days </from>
          <to xs:type="tFormalExpression">_2_CommentInput</to>
        </assignment>
      </dataInputAssociation>
      <dataInputAssociation>
        <targetRef>_2_SkippableInput</targetRef>
        <assignment>
          <from xs:type="tFormalExpression">false</from>
          <to xs:type="tFormalExpression">_2_SkippableInput</to>
        </assignment>
      </dataInputAssociation>
      <dataInputAssociation>
        <targetRef>_2_ContentInput</targetRef>
        <assignment>
          <from xs:type="tFormalExpression"></from>
          <to xs:type="tFormalExpression">_2_ContentInput</to>
        </assignment>
      </dataInputAssociation>
      <dataInputAssociation>
        <targetRef>_2_TaskNameInput</targetRef>
        <assignment>
          <from xs:type="tFormalExpression">Holiday Approval</from>
          <to xs:type="tFormalExpression">_2_TaskNameInput</to>
        </assignment>
      </dataInputAssociation>
      <dataInputAssociation>
        <targetRef>_2_PriorityInput</targetRef>
        <assignment>
          <from xs:type="tFormalExpression"></from>
          <to xs:type="tFormalExpression">_2_PriorityInput</to>
        </assignment>
      </dataInputAssociation>
      <dataOutputAssociation>
        <sourceRef>_2_response</sourceRef>
        <targetRef>_2_response</targetRef>
      </dataOutputAssociation>
      <potentialOwner>
        <resourceAssignmentExpression>
          <formalExpression>#{managers}</formalExpression>
        </resourceAssignmentExpression>
      </potentialOwner>
    </userTask>
    <endEvent id="_3" name="End" >
        <terminateEventDefinition/>
    </endEvent>

    <!-- connections -->
    <sequenceFlow id="_1-_2" sourceRef="_1" targetRef="_2" />
    <sequenceFlow id="_2-_3" sourceRef="_2" targetRef="_3" />

  </process>

  <bpmndi:BPMNDiagram>
    <bpmndi:BPMNPlane bpmnElement="com.sample.test" >
      <bpmndi:BPMNShape bpmnElement="_1" >
        <dc:Bounds x="16" y="16" width="48" height="48" />
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="_2" >
        <dc:Bounds x="96" y="16" width="100" height="48" />
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="_3" >
        <dc:Bounds x="340" y="16" width="48" height="48" />
      </bpmndi:BPMNShape>
      <bpmndi:BPMNEdge bpmnElement="_1-_2" >
        <di:waypoint x="40" y="40" />
        <di:waypoint x="146" y="40" />
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="_2-_3" >
        <di:waypoint x="146" y="40" />
        <di:waypoint x="364" y="40" />
      </bpmndi:BPMNEdge>
    </bpmndi:BPMNPlane>
  </bpmndi:BPMNDiagram>

</definitions>


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