Reading stock,requirment and receipts for a material in ABAP

Function MD_STOCK_REQUIREMENTS_LIST_API  will return a list, that is normally shown in the transaction MD04 in interactive mode. To check for specific planning elements, you should know their requirements type. Those can be found in the ABAP include program MM61XVAL. The descriptions are in German, but I guess those can be translated in the transaction STERM.