Function module CS_BOM_EXPL_MAT_V2 Documentation

I cannot find any documentation for function module CS_BOM_EXPL_MAT_V2. It is a very powerful function module, however, it is not useful without documentation. I know that it can do single level boms as well as multi level and a host of other things, but I can only guess without documentation. Do you know where I can get documentation for this function module.

thank you in advance, Leonard Getz, Dy4 Systems Inc. Ottawa, Ontario, Canada.