How to get the value of a node content in XML Literal in BPEL 2.0?

Question

Hi!
I have a Problem Build A Expression in activity allocation XML Literal one, I would like to help me ...
Well, I have the same activity in BPEL 1.0 version and now is Different is BPEL 2.0,
I have a Web Service < WSEjecutaComandos > Where to have a function Remote Commands That runs ,
Inputs my Web Service: " numEquipo int , String [ ] comandos , int numCta , int publicar , int version ,  String fecha"
The second argument is a string array type ..
Now in my BPEL process , I make is the following assignment:
<assign name="AssignCreaPath">
                    <copy>
                        <from>
                         <literal>
                              <fnCRexecElement xmlns="http://servicios/">
                                   <numEquipo>2</numEquipo>
                                   <comandos>mkdir etl/entradas/mmkis/</comandos>
                                   <numCuenta>1</numCuenta>
                                   <publicar>0</publicar>
                             </fnCRexecElement>
                        </literal>
                        </from>
                        <to>$InvokeClear_fnCRexec_InputVariable.parameters</to>
                    </copy>
                    <copy>
                        <from>concat(ora:getContentAsString($InvokeClear_fnCRexec_InputVariable.parameters/comandos),$inputVariable.payload/client:fecha)</from>
                        <to>$InvokeClear_fnCRexec_InputVariable.parameters/comandos</to>
                    </copy>
                    <copy>
                        <from>$InvokeVersion_fnGetVersionProcesoByFecha_OutputVariable.parameters/version</from>
                        <to>$InvokeClear_fnCRexec_InputVariable.parameters/version</to>
                    </copy>
                    <copy>
                        <from>$inputVariable.payload/client:fecha</from>
                        <to>$InvokeClear_fnCRexec_InputVariable.parameters/fecha</to>
                    </copy>
                </assign>
Well the conflict that I have is this,
previously defined a assign with XML Fragment copied it to the payload to the input variable Web Service (WSEjecutaComandos),
and the XML is copied in each of the variables ,
Then concatenate input values ( I remarked in red) < comandos > with the value from "fecha" ( String) , and again copy Variable < comandos > and did not have any problems
but now with the new BPEL 2.0, I do the same thing using now Literal XML ( that good!) but the option to concatenate (I remarked in red) and copied to the same variable ( I remarked in blue ), I mark the following error :
I should know, I'm doing wrong That , or you need to make XPath Function That The Value They already have the variable < comandos> will concatenate fecha ,
and is the final value for my entry my Web Service.
must be defined as the type values array <comandos[i]>
define the following activities before $InvokeClear_fnCRexec_InputVariable.parameters/comandos[1],
but it seems that this BPEL 2.0 does not respect me as index brackets .
Thank you...
Cheers,

Answer 1

thanks for your help , it served me!
I need to get the value of XMLNodeList <comandos> to concatenate the date.
Attempt to XPath function ( ora:getContentAsString(NodeList elementAsNodeList)), but returns me a String, but a nodoXML.
Cheers,
Maby