PI Mapping : Generating multiple nodes by one node

Question

Hi,
I'm looking for the solution how to generate two nodes by one node in source messages.  In the following sample messages, two nodes in source are expected to generate 4 nodes in output.
Source Structure
<item>
     <id>
     <name>
</item>
Target structure
<article>
     <flag>
     <id>
     <name>
</article>
Source message instance
<item>
     <id>1</id>
     <name>ABC</name>
</item>
<item>
     <id>2</id>
     <name>XYZ</name>
</item>
Expected output message
<article>
     <flag>QD</flag>
     <id>1</id>
     <name>ABC</name>
</article>
<article>
     <flag>QI</flag>
     <id>1</id>
     <name>ABC</name>
</article>
<article>
     <flag>QD</flag>
     <id>2</id>
     <name>XYZ</name>
</article>
<article>
     <flag>QI</flag>
     <id>2</id>
     <name>XYZ</name>
</article>
In output message, two node of article 1 should be together.
Thanks in advance!
Victor

Answer 1

Hey thanks to  all that contributed to the solution of this.
I'm a newby to message mapping of SAP PI.
But in my learning process I found out that the solution proposed in :
http://help.sap.com/saphelp_nw04/helpdata/en/26/d22366565be0449d7b3cc26b1bab10/content.htm
using the copyvalue function
is not working for the case where you have 2 partnernodes in the partnermsg. In this case the proposed solution is putting the street,city and zipcode of the first partnernode in both the targetnodes created in the mapping.
After some thinking about how to solve it I came up with the solution :
I created 3 UDF's  ( getstreet ,getcity and getzipcode) :
public void getstreet(String[] var1, ResultList result, Container container) throws StreamTransformationException{
for (int i = 0; i <  var1.length; i++) {
if ( (i%3)  == 0) {
   result.addValue(var1<i>);
public void getcity(String[] var1, ResultList result, Container container) throws StreamTransformationException{
for (int i = 0; i <  var1.length; i++) {
if ( (i%3)  == 1) {
   result.addValue(var1<i>);
public void getzipcode(String[] var1, ResultList result, Container container) throws StreamTransformationException{
for (int i = 0; i <  var1.length; i++) {
if ( (i%3)  == 2) {
   result.addValue(var1<i>);
the mapping for the target field street :
street = splitbyvalue ( getstreet(removecontext(addrdat))    "each value")
similar mappings need to be set for city and zipcode.
other mappings are :
customermsg = partnermsg
customer = createif(exists(partner)))
name = name
this solves the issue for the 2 partnernodes without using the copyvalue function