XML Optional node

Question

In the below XML code how to make the   <CUSTOMERDETAILS> node as Optional node.
If suppose in the input XML file if   <CUSTOMERDETAILS> node is not available,I want to make the node as optional one.
As of now system is getting dump, becuase node  data <CUSTOMERDETAILS> is not availbale in the XML file.
uFEFF<?sap.transform simple?>
<tt:transform xmlns:tt="http://www.sap.com/transformation-templates" xmlns:ddic="http://www.sap.com/abapxml/types/dictionary" xmlns:def="http://www.sap.com/abapxml/types/defined">
  <tt:root name="IT_TRANSACTION" type="ddic:ZTABTRANSACTION"/>
  <tt:template>
  <IT_TRANSACTION>
       <tt:loop ref=".IT_TRANSACTION" name="a">
          <item>
          <RETAILSTOREID tt:value-ref="RETAILSTOREID"/>
          <BUSINESSDAYDATE tt:value-ref="BUSINESSDAYDATE"/>
          <TRANSTYPECODE tt:value-ref="TRANSTYPECODE"/>
          <WORKSTATIONID tt:value-ref="WORKSTATIONID"/>
          <TRANSNUMBER tt:value-ref="TRANSNUMBER"/>
          <BEGINTIMESTAMP tt:value-ref="BEGINTIMESTAMP"/>
          <ENDTIMESTAMP tt:value-ref="ENDTIMESTAMP"/>
          <OPERATORQUAL tt:value-ref="OPERATORQUAL"/>
          <OPERATORID tt:value-ref="OPERATORID"/>
  <CUSTOMERDETAILS>
            <tt:loop ref="$a.CUSTOMERDETAILS">
              <item>
                <CUSTOMERINFOTYPE tt:value-ref="CUSTOMERINFOTYPE"/>
                <DATAELEMENTID tt:value-ref="DATAELEMENTID"/>
                <DATAELEMENTVALUE tt:value-ref="DATAELEMENTVALUE"/>
              </item>
            </tt:loop>
</CUSTOMERDETAILS>
<RETAILLINEITEM>
            <tt:loop ref="$a.RETAILLINEITEM" name="b">
              <item>
                <RETAILNUMBER tt:value-ref="RETAILNUMBER"/>
                <RETAILTYPECODE tt:value-ref="RETAILTYPECODE"/>
                <ITEMIDQUALIFIER tt:value-ref="ITEMIDQUALIFIER"/>
                <ITEMID tt:value-ref="ITEMID"/>
                <RETAILQUANTITY tt:value-ref="RETAILQUANTITY"/>
                <SALESAMOUNT tt:value-ref="SALESAMOUNT"/>
                <ENTRYMETHODCODE tt:value-ref="ENTRYMETHODCODE"/>
                <EXTENSIONS>
                  <tt:loop ref="$b.EXTENSIONS">
                    <item>
                      <FIELDGROUP tt:value-ref="FIELDGROUP"/>
                      <FIELDNAME tt:value-ref="FIELDNAME"/>
                      <FIELDVALUE tt:value-ref="FIELDVALUE"/>
                    </item>
                  </tt:loop>
</EXTENSIONS>
              </item>
            </tt:loop>
</RETAILLINEITEM>
<TAX>
            <tt:loop ref="$a.TAX">
              <item>
                <TAXNUMBER tt:value-ref="TAXNUMBER"/>
                <TAXTYPECODE tt:value-ref="TAXTYPECODE"/>
                <TAXAMOUNT tt:value-ref="TAXAMOUNT"/>
              </item>
            </tt:loop>
</TAX>
<EXTENSIONS>
            <tt:loop ref="$a.EXTENSIONS">
              <item>
                <FIELDGROUP tt:value-ref="FIELDGROUP"/>
                <FIELDNAME tt:value-ref="FIELDNAME"/>
                <FIELDVALUE tt:value-ref="FIELDVALUE"/>
              </item>
            </tt:loop>
</EXTENSIONS>
         </item>
       </tt:loop>
  </IT_TRANSACTION>
  </tt:template>
</tt:transform>
Edited by: Thomas Zloch on Nov 24, 2010 12:38 PM - please use code tags also for XML structures

Answer 1

You might be able to solve this using conditional transformations, please see SAP online help for simple transformations:
http://help.sap.com/saphelp_nw04/helpdata/en/0c/402040abf2c442e10000000a1550b0/frameset.htm
Please let us know the result.
Thomas