This part of ISO 18629 provides a specification of non-primitive concepts of the language, using a set of definitions written in the language of ISO 18629. These definitions provide axioms for terminology in this part of ISO 18629. The following is within the scope of this part of ISO 18629: ? definitions of state and time-related concepts specified using concepts of ISO 18629-11 and ISO 18629-12; ? constraints on the occurrences of activities that are expressed using time relations from ISO 18629-11 and state relations from ISO 18629-12. The following is outside the scope of this part of ISO 18629: ? definitions of concepts specified using concepts of ISO 18629-11 and ISO 18629-12 that are independent of state and time relations. NOTE: state and time-related concepts are concepts that are related to the time and the status of any entity related to manufacturing process and needed to specify it.