Need the approach for passing source to proxy and idocs

Hi PI mates,

i was struck in implementing one scenario.here is my scenario..i am getting source message (webservice call) and i need to pass it to table fields and as well standard idocs at the same time...for updating tables we are going with proxy.any how idocs will get update once we pass message.My question is how to go this approach..? we can create 2 structures at target but we dont have any conditions for routing .

is there any approach..pls light me.

thanks in advance,

Loordh