Abstract: A communication apparatus according to the present invention includes: a map display unit configured to output a map image on which another user is associated with a predetermined position so as to display to a target user; a selection accepting unit configured to accept selection of a position by the target user on the map image; and an output unit configured to acquire information sent by the other user associated with the position on the map image selected by the target user, and output to the target user.

Abstract: The contents conversion system of this invention comprises a style sheet storage means for storing a plurality of style sheets and an XML document storage means for storing XML documents for which the style sheet specifications are undefined, that selects a style sheet from the style sheet storage means, based on an XML document identified from the XML document storage means as the XML document required in relation to a contents request from client system and based on circumstance information of the client system from which the contents request is received and on the identified XML document.