When I query
select * from item_type_gl_account;
What is meaning of field item_type_gl_account.direction in moqui?
What is the meaning of O, I, E in item_type_gl_account.direction?
Please guide me the logic of value I, O, E in later accounting posting process logic steps.

The direction of the invoices.
Iis for Purchase Invoices (Inward)Ois for Sales Invoices (Outward).Eis for either of the above.