IFRS ASSET BOOK AND SECONDARY GL LEDGER

We have a requirement for an IFRS Asset Book (Tax eBook) which we would like to interface to our IFRS secondary ledger. From the white paper on alternate ledgers this does not seem to be possible since our secondary GL has the same currency and COA as the primary ledger, but I just wanted to confirm that this was the case. We would like to automate the IFRS process as much as possible and this would eliminate a fairly large manual step for us.