It is assumed that basic concepts of OPC UA information modelling and Joining System Base specification are understood in this specification. This specification will use these concepts to describe the Tightening System Information Model. For the purposes of this document, the terms and definitions given in OPC 10000-1, OPC 10000-3, OPC 10000-4, OPC 10000-5, OPC 10000-7, OPC 40450-1 as well as the following apply.

Note that OPC UA terms and terms defined in this specification are italicized in the specification.

Term	Definition of Term
Tightening System	The underlying tightening system for which the OPC UA server provides an abstracted view.

The terms described in OPC 40450-1 apply.

The conventions described in OPC 40450-1 apply.