Help: How do we retain XML tags inside BPEL

I have scenario where the entire input (XML) needs to be converted as string object and passed to Java service (WSIF). getVariableData is removing XML tags.
Input is a XML document with XML Signature in it. Without tags, Java code is not able to verify the signature.
I am using Apache XML Security libraries. In order for me to verify, code creates Document object (org.w3c.dom.Document) from an inputstream.
Any help is much appreiciated.

Hi Clemens,
First of all, thanks for the quick response. I would appreciate if you could help me little more to understand your suggestion. Currently, my BPEL process input is coming in with a structure, which includes XML information to load invoice along with its digital signature.
Currently, I am trying to include an activity of Assignement after receiveInput activity to create an Xpath expression of something like this..
concat(concat("<SignedInvoice>",concat(orcl:get-content-as-string(bpws:getVariableData('inputVariable','payload','/client:SignedInvoice/ns2:EM_VOUCHER_IN')),orcl:get-content-as-string(bpws:getVariableData('inputVariable','payload','/client:SignedInvoice/ns3:Signature')))) , "</SignedInvoice>")
Where would I be implementing your suggestion of casting with org.w3c.dom.Element? would it be in the expression builder or does it need to be done somewhere else.
Thanks again..
Ramesh

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======================
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==========
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ctx dbms_xmlgen.ctxHandle;
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( "@ENO"   NUMBER,
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      </EXCEPTIONS>
      <LOCATIONS>
        <LOCATION>
          <LINE_NUMBER>1</LINE_NUMBER>
          <EXCEPTIONS>
            <EXCEPTION>
              <EXCEPTION_CODE xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:nil="true"/>
              <EXCEPTION_LONG_DESC xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:nil="true"/>
            </EXCEPTION>
          </EXCEPTIONS>
          <DISTRIBUTIONS>
            <DISTRIBUTION>
              <LINE_NUMBER>1</LINE_NUMBER>
              <EXCEPTIONS>
                <EXCEPTION>
                  <EXCEPTION_CODE xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:nil="true"/>
                  <EXCEPTION_LONG_DESC xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:nil="true"/>
                </EXCEPTION>
              </EXCEPTIONS>
            </DISTRIBUTION>
          </DISTRIBUTIONS>
        </LOCATION>
      </LOCATIONS>
    </ITEM>
</ITEMS>
</GEBIZ_ORDER_ACK>current I am generating EXCEPTION tag even if it is null like
<EXCEPTIONS>
<EXCEPTION>
<EXCEPTION_CODE xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:nil="true"/>
<EXCEPTION_LONG_DESC xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:nil="true"/>
</EXCEPTION>
</EXCEPTIONS>
but my requirement is not generate them when exception code is null and only generate like
<EXCEPTIONS/>
this is sql i am using to generate the above said code let me know how can i control that
                   SELECT xmlserialize(document
                              xmlelement("GEBIZ_ORDER_ACK"
                              , xmlagg(
                                  xmlconcat(hdr, dtls)
                              as clob indent size = 2
                   -- INTO lv_out
                     FROM (
                           SELECT xmlelement("HEADER"
                                       , xmlelement("MINISTRY_CODE", poh.ministry_code)
                                       , xmlelement("EXCEPTIONS"
                                             , xmlelement("EXCEPTION"
                                                         , xmlelement("EXCEPTION_CODE"   --,NVL(poh.exception_code,'NULL')
                                                         , xmlattributes(
                                                           NVL2(poh.exception_code,null,'http://www.w3.org/2001/XMLSchema-instance') as "xmlns:xsi"
                                                         , NVL2(poh.exception_code,null,'true') as "xsi:nil"
                                                         ,poh.exception_code)
                                                         , xmlelement("EXCEPTION_LONG_DESC"
                                                         , xmlattributes(
                                                           NVL2(poh.exception_long_desc,null,'http://www.w3.org/2001/XMLSchema-instance') as "xmlns:xsi"
                                                         , NVL2(poh.exception_long_desc,null,'true') as "xsi:nil"
                                                         ,poh.exception_long_desc)
                                       ) hdr
                                 , xmlelement("ITEMS"
                                 , xmlagg(
                                          xmlelement("ITEM"
                                           ,xmlelement("LINE_NUMBER", v1.line_no)
                                           ,xmlelement("EXCEPTIONS"
                                                    , xmlelement("EXCEPTION"
                                                                , xmlelement("EXCEPTION_CODE"    --,NVL(v1.exception_code,'NULL')
                                                                , xmlattributes(
                                                                  NVL2(v1.exception_code,null,'http://www.w3.org/2001/XMLSchema-instance') as "xmlns:xsi"
                                                                , NVL2(v1.exception_code,null,'true') as "xsi:nil"
                                                                , v1.exception_code)
                                                                , xmlelement("EXCEPTION_LONG_DESC"
                                                                , xmlattributes(
                                                                  NVL2(v1.exception_long_desc,null,'http://www.w3.org/2001/XMLSchema-instance') as "xmlns:xsi"
                                                                , NVL2(v1.exception_long_desc,null,'true') as "xsi:nil"
                                                                ,v1.exception_long_desc)
                                           ,xmlelement("LOCATIONS"
                                           ,( SELECT xmlagg(
                                                      xmlelement("LOCATION"
                                                    , xmlelement("LINE_NUMBER",v2.location_line_no)
                                                    , xmlelement("EXCEPTIONS"
                                                    , xmlelement("EXCEPTION"
                                                    , xmlelement("EXCEPTION_CODE"   --,NVL(v2.exception_code,'NULL')
                                                    , xmlattributes(
                                                      NVL2(v2.exception_code,null,'http://www.w3.org/2001/XMLSchema-instance') as "xmlns:xsi"
                                                    , NVL2(v2.exception_code,null,'true') as "xsi:nil"
                                                    , v2.exception_code)
                                                    , xmlelement("EXCEPTION_LONG_DESC"
                                                    , xmlattributes(
                                                      NVL2(v2.exception_long_desc,null,'http://www.w3.org/2001/XMLSchema-instance') as "xmlns:xsi"
                                                    , NVL2(v2.exception_long_desc,null,'true') as "xsi:nil"
                                                    ,v2.exception_long_desc)
                                           ,xmlelement("DISTRIBUTIONS"
                                           ,(SELECT xmlagg
                                             (       xmlelement("DISTRIBUTION"
                                                     ,xmlelement("LINE_NUMBER", v3.distribution_line_no)
                                                     ,xmlelement("EXCEPTIONS"
                                                     , xmlelement("EXCEPTION"
                                                     , xmlelement("EXCEPTION_CODE"--,NVL(v3.exception_code,'NULL')
                                                     , xmlattributes(
                                                       NVL2(v3.exception_code,null,'http://www.w3.org/2001/XMLSchema-instance') as "xmlns:xsi"
                                                     , NVL2(v3.exception_code,null,'true') as "xsi:nil"
                                                     ,v3.exception_code)
                                                     , xmlelement("EXCEPTION_LONG_DESC"
                                                     , xmlattributes(
                                                       NVL2(v3.exception_long_desc,null,'http://www.w3.org/2001/XMLSchema-instance') as "xmlns:xsi"
                                                     , NVL2(v3.exception_long_desc,null,'true') as "xsi:nil"
                                                    ,v3.exception_long_desc)
                                                      ) ORDER BY v3.distribution_line_no
                                                   ) FROM xgbz_fin_stage_ack_pot_v@dev_1157.RP.EDU.SG v3
                                                    WHERE v2.po_cont_code = v3.po_cont_code
                                                      AND v2.line_no = v3.line_no
                                                      AND v2.location_line_no = v3.location_line_no
                                                      AND v2.fs_timestamp = v3.fs_timestamp
                                                      AND v3.tx_timestamp IS NULL
                                             ) ORDER BY v2.location_line_no
                                          ) FROM xgbz_fin_stage_ack_pol_v@dev_1157.RP.EDU.SG v2
                                           WHERE v2.line_no = v1.line_no
                                             AND v2.po_cont_code = v1.po_cont_code
                                             AND v2.fs_timestamp = v1.fs_timestamp
                                             AND v2.TX_TIMESTAMP IS NULL
                         ) ORDER BY v1.line_no
                     ) dtls
                FROM xgbz_fin_stage_ack_poh_v@dev_1157.rp.edu.sg poh,
                     xgbz_fin_stage_ack_pod_v@dev_1157.rp.edu.sg v1
               WHERE v1.po_cont_code = poh.po_cont_code
                 AND v1.fs_timestamp = poh.fs_timestamp
                 AND v1.tx_timestamp IS NULL
                 AND poh.tx_timestamp IS NULL
                 AND poh.po_cont_code = rec_po_ack.po_cont_code
               GROUP BY poh.po_cont_code,poh.ext_system_code,poh.amendment_no,poh.variation_no,poh.exception_code,poh.exception_long_desc,
                        poh.ministry_code, poh.dept_code)This is urgent please help in this regard.
thanks in advance.
Regards
Nagendra

Hi,
Here are two possible solutions :
xmlelement("EXCEPTIONS",
xmlforest(
    xmlforest(
      v1.exception_code as "EXCEPTION_CODE"
    , v1.exception_long_desc as "EXCEPTION_LONG_DESC"
    ) as "EXCEPTION"
)or,
xmlelement("EXCEPTIONS",
case when v1.exception_code is not null
         or v1.exception_long_desc is not null
    then xmlelement("EXCEPTION",
           xmlforest(
             v1.exception_code as "EXCEPTION_CODE"
           , v1.exception_long_desc as "EXCEPTION_LONG_DESC"
end
)

Help: How do we retain XML tags inside BPEL

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