Formulas in SAP BO BI

Hello,

I noticed in reports that SAP BO allows to call variable details in a report or in the recurrent job using %'s.

Examples are %SI_DATE% to return the data or %EXT% to return an extension.

I could not find a list of existing commands for these formulas, does it exist in the documentation?

Thanks for your support.

Wkr,

Steven