How to pass a single element in an array to XSL from BPEL

In a bpel (2.0) process I have a for-each loop iterating through a list in the original input document. Within that loop I need to construct an input document for a call to a web service based on data in the current node of the list objects I am looping through.
Constructing the input document via BPEL assign activity copies within the for-each loop is an option but due to the complexity of that document I would prefer to use XSL. But I don't know how to pass the index information (ie. the for-each counter) into XSL and use it there (and I would prefer not to have to do so, since that will prevent use of the XSL GUI in jdev), so I would prefer to send the current node of the list as input to XSL instead.
Is it possible to pass a sub-section of an XML document (e.g. one node in the array) as input into XSL rather than the whole document? In other words, I would like to send the current array element from the original input document rather than the entire original input document because I will be using the data within that array element to create the web service input document.
Example:
<forEach parallel="no" counterName="i"
                     name="ForEachEntry">
              <startCounterValue>1</startCounterValue>
              <finalCounterValue>$numTimeEntries</finalCounterValue>
If I used the BPEL assign activity to populate the input document I would need lots of copies similar to this:
              <copy>
                  <from>$inputVariable.OteStgTimecardCollection/ns3:OteStgTimecard[1]/ns3:oteStgTimecardDetailCollection/ns3:OteStgTimecardDetail[$i]/ns3:origtransactionreference</from>
                  <to>$InvokeOteDetailAbsenceErrorStatusService_OteAbsenceDetailFailureService_InputVariable.OteAbsenceDetailFailureServiceInput_msg/ns19:OrigTransactionReference</to>
              </copy>
I would prefer to send the current list object as an input variable into an XSL transform:
     $inputVariable.OteStgTimecardCollection/ns3:OteStgTimecard[1]/ns3:oteStgTimecardDetailCollection/ns3:OteStgTimecardDetail[$i]
Is there syntax in bpel that would do that?
Thanks

You need use While Element and use Array like Element[number]
With While element you iterate <employee> node
and with Element[number] you can extract information from that node.
I wrote a BPEL that scan a XML file, the input is:
<cliente>
        <codigo>01</codigo>
        <nombre>Deiby Mauricio Gomez</nombre>
                <productos>
                        <producto>
                                <nombre>Camisa Polo</nombre>
                                <precio>50</precio>
                        </producto>
                        <producto>
                                <nombre>Pantalon Lona</nombre>
                                <precio>100</precio>
                        </producto>
                </productos>
        </cliente>
        <cliente>
        <codigo>02</codigo>
        <nombre>Julio Cesar Ayapan</nombre>
                <productos>
                        <producto>
                                <nombre>Camisa Polo</nombre>
                                <precio>50</precio>
                        </producto>
                </productos>
        </cliente>
In my BPEL I added up all article prices and after that I write to txt file the client and the Total.
Example:
Deiby Gomez, 150
Cesar Ayapan, 50
My while element is this (Please pay attention in bold words):
<while name="While1"
           condition="bpws:getVariableData('variable1')<=count(bpws:getVariableData('Receive1_input_files','body','/ns4:clientes/ns4:cliente'))">
      <sequence>
        <assign name="Assign1">
          <copy>
            <from expression="sum(bpws:getVariableData('Receive1_input_files','body','/ns4:clientes/ns4:cliente[number(bpws:getVariableData("variable1"))]/ns4:productos/ns4:producto/ns4:precio'))"/>
            <to variable="Invoke1_process_InputVariable" part="payload"
                query="/ns5:process/ns5:cantidad"/>
          </copy>
          <copy>
            <from variable="Receive1_input_files" part="body"
                  query='/ns4:clientes/ns4:cliente[number(bpws:getVariableData("variable1"))]/ns4:codigo'/>
            <to variable="Invoke1_process_InputVariable" part="payload"
                query="/ns5:process/ns5:id"/>
          </copy>
        </assign>
        <invoke name="Invoke1" inputVariable="Invoke1_process_InputVariable"
                outputVariable="Invoke1_process_OutputVariable"
                partnerLink="ValidacionBancos2WS" portType="ns5:BPELProcess1"
                operation="process" bpelx:invokeAsDetail="no"/>
        <switch name="Switch1">
          <case condition="bpws:getVariableData('Invoke1_process_OutputVariable','payload','/ns5:processResponse/ns5:resultado')='true'">
            <bpelx:annotation>
              <bpelx:pattern>Si el cliente es aprobado</bpelx:pattern>
              <bpelx:general>
                <bpelx:property name="userLabel">Si Aprobado</bpelx:property>
              </bpelx:general>
            </bpelx:annotation>
            <sequence>
              <assign name="Assign4">
                <copy>
                  <from variable="Receive1_input_files" part="body"
                        query='/ns4:clientes/ns4:cliente[number(bpws:getVariableData("variable1"))]/ns4:codigo'/>
                  <to variable="Approved_Write_input" part="body"
                      query="/ns7:clientes/ns7:cliente/ns7:id"/>
                </copy>
                <copy>
                  <from variable="Receive1_input_files" part="body"
                        query="/ns4:clientes/ns4:cliente[number(bpws:getVariableData("variable1"))]/ns4:nombre"/>
                  <to variable="Approved_Write_input" part="body"
                      query="/ns7:clientes/ns7:cliente/ns7:nombre"/>
                </copy>
                <copy>
                  <from expression="sum(bpws:getVariableData('Receive1_input_files','body','/ns4:clientes/ns4:cliente[number(bpws:getVariableData("variable1"))]/ns4:productos/ns4:producto/ns4:precio'))"/>
                  <to variable="Approved_Write_input" part="body"
                      query="/ns7:clientes/ns7:cliente/ns7:total"/>
                </copy>
              </assign>
              <invoke name="Invoke2" inputVariable="Approved_Write_input"
                      partnerLink="fileAdapterWriteApproved"
                      portType="ns6:Write_ptt" operation="Write"
                      bpelx:invokeAsDetail="no"/>
            </sequence>
          </case>
          <otherwise>
            <sequence name="Sequence1">
              <assign name="Assign5">
                <copy>
                  <from variable="Receive1_input_files" part="body"
                        query='/ns4:clientes/ns4:cliente[number(bpws:getVariableData("variable1"))]/ns4:codigo'/>
                  <to variable="Rechazados_Write_input" part="body"
                      query="/ns9:clientes/ns9:cliente/ns9:id"/>
                </copy>
                <copy>
                  <from variable="Receive1_input_files" part="body"
                        query="/ns4:clientes/ns4:cliente[number(bpws:getVariableData("variable1"))]/ns4:nombre"/>
                  <to variable="Rechazados_Write_input" part="body"
                      query="/ns9:clientes/ns9:cliente/ns9:nombre"/>
                </copy>
                <copy>
                  <from expression="sum(bpws:getVariableData('Receive1_input_files','body','/ns4:clientes/ns4:cliente[number(bpws:getVariableData("variable1"))]/ns4:productos/ns4:producto/ns4:precio'))"/>
                  <to variable="Rechazados_Write_input" part="body"
                      query="/ns9:clientes/ns9:cliente/ns9:total"/>
                </copy>
              </assign>
              <invoke name="Invoke3"
                      inputVariable="Rechazados_Write_input"
                      partnerLink="fileAdapterWriteRechazados"
                      portType="ns8:Write_ptt" operation="Write"
                      bpelx:invokeAsDetail="no"/>
            </sequence>
          </otherwise>
        </switch>
        <assign name="Assign2">
          <copy>
            <from expression="''"/>
            <to variable="Invoke1_process_InputVariable" part="payload"
                query="/ns5:process/ns5:id"/>
          </copy>
          <copy>
            <from expression="bpws:getVariableData('variable1')+1"/>
            <to variable="variable1"/>
          </copy>
          <copy>
            <from expression="''"/>
            <to variable="Invoke1_process_InputVariable" part="payload"
                query="/ns5:process/ns5:cantidad"/>
          </copy>
        </assign>
      </sequence>
    </while>

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