Part 3 defines the data to be used for a description of individual charging systems in terms of charged geographical objects, charging and reporting rules. For every toll charger""s system, attributes as defined in part 3 are used to transfer data to the front-end in order to instruct it on which data to collect and report.The definition will cover the following aspects:- version management of individual charging schemes;- context data including semantics, format and coding;- definition of data records related to updating.Part 3 will support different implementations and choices regarding the split of processing tasks between OBE and proxy (e.g. both """"th