As described in the parent document, SAE J1939, there is a minimum of seven documents required to fully define a complete version of this network. This particular SAE Recommended Practice, SAE J1939-71, describes an Application Layer for vehicle use.
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New parameters and parameter groups are reviewed and discussed by the Truck and Bus Control and Communications Network Committee on a regular basis. This SAE Recommended Practice has been updated to reflect all changes and additions approved and balloted through May 2011.