Patent ID: 7590486

Claim:
An automobile navigation apparatus comprising; a map data base storing map data in a rewritable memory medium, a map data management unit that classifies said map data into attributions of information properties characterized by said map data and composes tables including said attributions which are specified in records thereof and enables access to said map data in a unit of said records, an updating data acquisition unit that transmits a request to update the map data and that acquires updated data of a map that includes updating procedure information transmitted in response to the request, an information interpreting unit that interprets the updating procedure information, and that compiles the updating actions in the updating procedure information into commands that direct the automobile navigation apparatus to update the each specified map element in the updating procedure information; and a map data updating unit that searches over said map data base based on a result of the interpretation, wherein said acquired updating procedure information includes: updating conditions for specifying map elements to be updated, updating actions that describe updating commands to be performed by the automobile navigation apparatus to update the map data, wherein the commands include one or more of deleting, adding and modifying content, and an order for performing the updating commands.