This European Standard provides mechanisms through which various vendors of building automation, control, and building management systems may exchange information in a standardised way. This document provides specifications for the Application Elements of Control Network Protocol packets as follows: - definitions of standardized packet (network-variable) data types;- definitions of device-interface files;- definitions of standardized configuration-property types;- definitions of standardized enumeration types;- definitions of standardized functional profiles;- definition of the standardized method of file transfer between devices.The purpose of this specifi