A device having negotiation functions and agreement formation system

摘要

An object of the present invention is to provide a device capable of negotiation about the disclosure of attribute information. According to the present invention, a terminal is provided with: a personal attribute information creation and management part that stores and manages users' attribute information; and an input-output management part that controls the output of users' attribute information to external devices and the input of others' attribute information from external devices. The center device comprises: a contents management part that manages contents; a server part that implements services; a service attribute information creation and management part that manages attribute information about contents and services; and an input-output management part that controls the output of attribute information of services and contents to external devices, and the input of users' attribute information inputted from other devices. With this construction, the input-output management part of the terminal and the input-output management part of the center device perform negotiation with each other to automatically decide a range of attribute information to be disclosed.