Finding and your answer
Account.AccountType column (String)
Direct match
98%
How the model read it
Current gold observes the qualified column `Account.AccountType` as String. The object is directly covered, although the authoritative wording limits the definition to revenue/expense while representative rows also show Asset, Liability and Equity values.
Workbook evidence
Cited current gold
Open questions
Should the AccountType business definition and permitted domain explicitly include Asset, Liability and Equity as shown by the representative chart of accounts?