New in the reference: GET /transactions/extended/. Same parameters and fields as GET /transactions/, plus sum over all matching transactions (from reporting_amount, in the company currency).
Corrected: GET /transactions/ returns no sum. The reference said it did.
New field documented: reporting_amount on transactions.
Corrected: value_date and bank_booking_date are dates (YYYY-MM-DD), not timestamps. New field documented: value_time (HH:MM:SS, usually null).
New: how to check that a transaction import is complete (count and sum).
New fields documented for creating an offline account: alias, holder_name, type_name, balance (opening balance) and overdraft_limit.
Deprecated: predicted_unmapped_transactions in the transaction lists. It will be removed.