Merging lists in BPEL

Hello all,



I need to merge two lists in BPEL and was wondering if anybody could give me
some pointers and throw some light on it.



Here's some more explanation:



I have a document retrieve BPEL process which splits the request into two
functionally independent pieces and processes those appropriately. The
response from both processing services is a response type with two lists
within (a list of error types and a list of document response types - both
having defined types). All I want to do is create a combined response
merging the two lists of errors and the two lists of document responses. I
would need to know how to merge lists of predefined types to be able to
achieve this.



Here's a screenshot showing the split and where I would like to do the
merging of lists -







Thanks in advance.



-- Sourabh Pawar