This standard adopts adding a PackML prefix to all PackML defined terms that are used in this standard that are also defined by OPC. The <Term> is the terminology defined by PackML. This allows the terminology used in PackML to be easily distinguished from terminology defined in OPC UA.

a concept that defines a collection of associated modules that can carry out one or more major processing activities.

Note: in PackML Unit and Machine are used to define the same thing and can at times be interchanged.

a concept that represents named data element that is used to command, read status, or provide administration of a unit.

a concept that represents a state model of the operational state of a unit.

a concept that represents the mode of operation of a unit, indicating which state model is currently active.