The INSS system provides a facility similar to email, where users may compose messages and send them to their negotiating partners. These messages may be send together with an offer or athe user may sent a message instead of an offer. Messages complementing offers are sent together with an offer. They often contain a justification for the offer they accompany and possibly arguments for rejecting the opponent's previous offer. They may also contain additional information the that user may want to convey to his or her partner.
Messages replacing offers are send instead of an offer.
At any point in time, the user may want to discuss other issues other than the offer, ask for clarifications, prompt the opponent for action, or explain the situation or discuss the protocol with the partner. This is the alternative that will be accepted if the negotiation breaks down. New values for continuous issues This option will allow to enter any value for a continuous issue other than the values specified at the beginning of negotiations. The continuues issue are those for which intermediate values make sense. Price, for example, is a continuous issue.