Transaction Journal
Transaction Journal: the kind of document a posting belongs to, with its number range, posting statuses, date window and the rules documents of that journal follow.
Postkey
Postkey: the named kinds of posting line (customer receivable, sales revenue, output tax...) that posting profiles attach accounts to.
Process Post Key
Process Post Key: for one posting screen, the lines its voucher is made of: which amount, which post key, which side, and where the account comes from.
Posting Profile
Posting Profile: per company and module, which ledger account each post key goes to, refined by customer group, vendor group, item posting group, tax code and more.
Automatic Transaction
Automatic Transaction: per company, accounts the ledger posts to by itself, today the two inter-unit accounts.