This part of ISO 13399 gives guidelines for the application of ISO 13399 as a whole, including guidance on the instantiation of the EXPRESS schema as described in ISO 13399-1, and the use of the reference data described in ISO/TS 13399-2, ISO/TS 13399-3, ISO/TS 13399-4, ISO/TS 13399-5, ISO/TS 13399-50 and ISO/TS 13399-60. This part of ISO 13399 does not define the terms and properties for cutting items, tool items, adaptive items assembly items, reference systems or common features and connection systems.