Defines syntax and semantics of the data types and tools common to the tools defined in the other parts of ISO/IEC 23005, such as basic data types which are used as basic building blocks in more than one of the tools in ISO/IEC 23005, colour-related basic types which are used in light and colour-related tools to help in specifying colour-related characteristics of the devices or commands, and time stamp types which can be used in device commands, and sensed information to specify timing related information.