Mapping from flat sql message to nested idoc

Question

Hi,
im trying to map the values from a database select to an idoc. the structure is  like that:
?xml version="1.0" encoding="UTF-8"?>
<ns0:Messages xmlns:ns0="">
   <ns0:Message1>
      <ns1:MT_SQL_Invoice_Req_response xmlns:ns1="">
         <SELECT_STATEMENT_response>
            <row>
               <ID>
               <TYPE>
               <VALUE>
            </row>
            <row>
               <ID>
               <TYPE>
               <VALUE>
            </row>
         </SELECT_STATEMENT_response>
      </ns1:MT_SQL_Invoice_Req_response>
   </ns0:Message1>
</ns0:Messages>
So I'm getting several rows in one message. For every <ID> i want to create a new Idoc. This problem i solved with a sort and split function. (BPE) Now i want to check if the <TYPE> has a specific value "POS" If that value is in the row i want to create a new row for an Item in the idoc. If the <TYPE> is "TAX" i want a new row in the idoc in position/tax. I'm quite new to SAP PI so I am sorry that i can't describe my problem better. Does anybody have an idea how i can solve that problem?
Thank you in advance for your advices

Answer 1

Thank you for your help, but still can't get it working
My target message should have a structure like that:
<?xml version="1.0" encoding="UTF-8"?>
<ns0:Messages xmlns:ns0="">
<ns0:Message1><ZBILLING>
<IDOC BEGIN="Constant">
     <EDI_DC40
     </EDI_DC40>
          <E1FKK_EBS_TOI_HEADER SEGMENT="1">
               <E1FKK_EBS_TOI_ITEMS>          
                     <E1FKK_EBS_TOI_TAX SEGMENT="Constant">
                     <TAX_BASE>Constant</TAX_BASE>
                 </E1FKK_EBS_TOI_TAX>
               </E1FKK_EBS_TOI_ITEMS>
               <E1FKK_EBS_TOI_ITEMS>
                    <E1FKK_EBS_TOI_TAX SEGMENT="Constant">
                     <TAX_BASE>Constant</TAX_BASE>
                </E1FKK_EBS_TOI_TAX>
               </E1FKK_EBS_TOI_ITEMS>          
          </E1FKK_EBS_TOI_HEADER>
</IDOC>
<IDOC BEGIN="Constant">
     <EDI_DC40
     </EDI_DC40>
          <E1FKK_EBS_TOI_HEADER SEGMENT="2">
               <E1FKK_EBS_TOI_ITEMS>
                    <E1FKK_EBS_TOI_TAX SEGMENT="Constant">
                     <TAX_BASE>Constant</TAX_BASE>
                </E1FKK_EBS_TOI_TAX>
               </E1FKK_EBS_TOI_ITEMS>
          </E1FKK_EBS_TOI_HEADER>
</IDOC>
<IDOC BEGIN="Constant">
     <EDI_DC40
     </EDI_DC40>
          <E1FKK_EBS_TOI_HEADER SEGMENT="3">
               <E1FKK_EBS_TOI_ITEMS>
                    <E1FKK_EBS_TOI_TAX SEGMENT="Constant">
                     <TAX_BASE>Constant</TAX_BASE>
                </E1FKK_EBS_TOI_TAX>
               </E1FKK_EBS_TOI_ITEMS>
          </E1FKK_EBS_TOI_HEADER>
</IDOC><
/ZBILLING>
</ns0:Message1>
</ns0:Messages>
What I've done right now is
1.
<ID> --> sort > splitByValue(valuechanged) - > collapseContext> <IDOC>
I will get an <IDOC> for every ID
2.
For <E1FKK_EBS_TOI_HEADER> i use a constant
3.
for <E1FKK_EBS_TOI_ITEMS> i do
<ART> equals CONSTANT "POS" --> ifWithoutElse then <Art> --> <E1FKK_EBS_TOI_ITEMS>
with that mappings i will get an Idoc for every ID but the <E1FKK_EBS_TOI_ITEMS> are all created in the first <IDOC> the others are empty. I tried to use constant'true' in case "then" of the ifWithoutElse but here I need a bool. And what about the contexts, I'm not sure if use them in the right way?
Thank you for any idea