MD_STOCK_REQUIREMENTS_LIST_API: MDPSX & MDEZX

I'm using FM 'MD_STOCK_REQUIREMENTS_LIST_API' to get a MD04 kind of list.

I just don't know how to join table MDPSX & MDEZX.

MDEZX contains a kind of MD04 overview data, and MDPSX contains the info about the business document.

Any idea how to link them?

Thanks,

Incho