LSMW for Material Creation using Direct Input

Hi All

I am trying to create new materials using LSMW Direct input method. I am using object 20/program RMDATIND.

Its kind of basic query, how do prepare my load file now. Looking available fields in the object I can determine many of the required fields. But I want to know are there are mandatory fields data that I should provide in my load file.

This question comes because structure BGR00/BMM00 contains lots of field which I am not sure I need to provide or not.

I need some guidance to understand structures and way to decide structure of of my load files.

Thanks in advance.