account in FISL infosource

Dear Experts,

I need your help.

the online help does not show account infoobject for FI-SL totals or line item data.

there is only a 'chart of account' characteristic infoobject.

I think the source R/3 FISL tables have account field and document identifier field. Would BW show account information after extraction? can more characteristics be added to the list shown in the online help ?

Please, I hope for your advise.

Best regards

Adette