scope:

This International Standard provides information as a checklist to consider handling messages that are defined by the application working groups of ISO/TC 204, installing systems and selecting suitable wide area communication systems for providing ITS application services. The usages of this information are for frameworks of message headers, pay load items for initializing communication links, checklists for system design and so on. Thus, these information items are not necessarily contained in message instances and/or headers that are actually transmitted. For example, this information is used to organize the characteristics of messages such as those requesting hand-over based on the relationship between the size of the information service area and the communication range of each communication system