MATMAS with ECM

Hello,

I want to integrate Materials through idoc interface. ECM (Engineering Change Management) is used : that means we use change request and revision level in material.

I successfully integrate the ECMMAS element for a new change request.

I successfully integrate the ECMREV element that links the change request and the revision level.

I miss something with the last point : how do I integrate the modifications of the material in reference to the change number ?

I don't see any field concerning a change request number in MATMAS... is it the correct idoc ? process code ?

Thanks for your help

Guillaume