IDOC to IDOC Issue

Hi ,

I have an issue with Orders message type. we both  are using  SAP standard Orders message type. But Our partner sending some additional data which they can't control their side and which cause issue our end too in R/3 system end. So that I need to stop them within PI system before seding to R/3 system at our end.

     In the message type. There is a segment called E1EDKA1. This segment having filde PARVW(qualifier) and other fields.   PARVW having different qualifer like. WE, AG, LS and LF.  PI system needs to process the IDOC only WE qulifier data to R/3 system. Rest of Not.

   Thanks in Advance.