Regarding the mapping

Hi Experts,

               I had a requirement where sender structure is as follows

Sender (Fcc)                                            

Customer

      Header (Occurance is 1..1)

          field1

          field2

          ......so on

     Item(Occurance is 1..Unbounded)

          field1

          field2

          ......soon

    Footer(1..Unbounded)

          field1

          field 2

          .....so on

Receiver is IDOC

Here my requirement is i am getting the same Record twice or thrice  where i need to send one idoc only.If the value of field changes i need to create the new idoc .i.e. no need create the new idoc for same data.Please help me guys.

Thanks in advance

Giridhar