Commonsense Aspects of Buying and Selling

We describe an experimental approach toward implementing a commonsense ``microthe ory’ ’ for buying and se lling. Our prototype system characterize s how inte lligent agents hold items and money, how they buy and se ll items, and the way money and items are transfe rred. The ontology of the . system include s mone y cash, che ck, credit card , agents people , organiza. . tions , items movable , real estate , se rvice , barte r, and the notions of transfe r, loan, buying by installments, profit, and loss.