header data and item data into same internal table

Hi Experts,

I WANT TO KNOW THE LOGIC TO POPULATE HEADER DATA AND ITEM DATA INTO SAME INTERNAL TABLE AND AGAIN DOWNLOAD THE SAME TO EXCEL FILE .Output file should be displayed like this format

Header1 rectyp ,hdnum ,sbank ,bankl ,accnr , paytp , crda ,iso.

Item1 : rectyp ,valut ,cknum ,amount,bankl,accnr,pdate,bnktc.

Item2 : rectyp ,valut ,cknum ,amount,bankl,accnr,pdate,bnktc.

Header2: rectyp ,hdnum ,sbank ,bankl ,accnr , paytp , crda ,iso.

Item1 : rectyp ,valut ,cknum ,amount,bankl,accnr,pdate,bnktc.

Thanks

Moderator message: Please do not use all upper case in the future.

Edited by: Thomas Zloch on May 12, 2010 3:10 PM