Abstract: An object of the present invention is to provide a data processing system which makes it possible to reflect data in a data aggregate of another party, with the mutual relational properties of the data preserved, in a case in which there has been a modification, addition, or the like in any of at least two data aggregates.

Abstract: An object of the present invention is to provide a data processing system which makes it possible to reflect data in a data aggregate of another party, with the mutual relational properties of the data preserved, in a case in which there has been a modification, addition, or the like in any of at least two data aggregates.

Abstract: A navigation device displays major routes and direction indications without a specific destination requirement. Where several possible destinations are presented, the device displays information for a destination at or when nearing decision points for traveling to the destination. Direction indicators can be presented on top of an appropriately scaled map having routes displayed which are integral to the indicators and directions. A destination displayed may be selected to retrieve detailed driving instructions to that specific destination. In one embodiment, the navigation device displays direction indications to major destinations, entrances, exits, and other important facilities in a “highway sign” fashion at major decision points.