Although the Data Standard describes the information involved in an orienteering event it is not well suited as a standard for the information sent between systems.

The Message Standard should identify the different systems involved in an orienteering event and describe what data ("messages") that should be send between the systems. Version 2.0 of the standard identifies some of the messages needed.

At the Oslo seminar in October 1998 the following structure was found:

Version 2.0 defines some of these messages:

• 1: EventList.
• 2: ClubList.
• 3: CompetitorList.
• 4 (Partly 5 and 6): EntryList.
• 9, Partly 8: CourseData, ClassData.
• 14, 17: ResultList.