This standard will define the base message syntax and data encoding for medical device application profiles. The definitions will augment and in some cases optimize related industry standards, chiefly ISO Systems Management standards, particularly with respect to cost-performance improvements for real-time medical data communication. It is limited to upper-layer (i.e., ISO OSI Application, Presentation, and Session) services and protocols used for medical device communication. As a base standards, it neither defines application-specific content of messages nor specific application profiles.