A data communication system including a transmitting apparatus, a plurality of receiving apparatuses, a data transmitting apparatus, a data selecting and receiving means, a profile ID linking means, and a received data processing means. The transmitting apparatus incorporates a contents data generating means for generating a contents data. The data transmitting apparatus transmits data between the transmitting apparatus and the receiving apparatuses. The received data processing means processes data received by the data selecting and receiving means. The profile ID linking means initially generates a profile ID corresponding to a profile related to the contents data and/or transmission and reception of the contents data and then causes the profile ID to be linked with the contents data.