The act of participating in an exchange of goods and services for monetary compensation. An agent trades an object, product or service with a participant in exchange for a one time or periodic payment.ActionactionStatus, additionalType, agent, alternateName, description, disambiguatingDescription, endTime, error, identifier, image, instrument, location, mainEntityOfPage, name, object, participant, potentialAction, price, priceCurrency, priceSpecification, result, sameAs, startTime, subjectOf, target, urlBuyAction, DonateAction, OrderAction, PayAction, PreOrderAction, QuoteAction, RentAction, SellAction, TipAction