METHOD FOR REPRESENTING DESCRIPTION LANGUAGE AND DATA STRUCTURE TO UPDATE IPMP TOOL, IPMP TOOL UPDATING METHOD AND CLIENT APPARATUS USING THE SAME

The present invention relates to a language representation method and data structure for updating an IPMP tool, a method for updating an IPMP tool using the same and a client apparatus using the same in protection and management of multimedia contents, by which the IPMP tool can be represented dynamically in order to provide convenience to users. In the language representation method for updating an IPMP tool in an MPEG-21 multimedia framework, an update element, which describes update information of the IPMP tool, is defined as a higher level element; and a location element, which has information on a location allowing the IPMP tool to be carried thereto, is described as a lower level element of the update element.