Extractor 0FI_AR_4

Hi,

For Loading the Accounts Receivable Data in BW i am using the Extract sructure 0FI_AR_4. I need the information of Billing Document and Item from the above Data Source for the Corresponding Accounting Document.

The Billing document is stored in 0DOC_NUMBER. How do i get the ITem no o the Billing docuemnt.

Can any one let me know how to derive the Billing No and Item No for the corresponding Account document No.

Let me know the Tables used on the R/3 side, or if there any fields availbale in the extractor 0FI_AR_4 for storing the Item No of the Billing Document.

Thanks,

Saketh.