Definition of Term


The set of external entities working with the joining system in one way or another. Examples: PLC, MES, etc.


Not part of the joining system or the OPC UA server; may refer to the automation system, the manufacturing execution system, or other entities.

System-wide unique

Used in conjunction with identifiers and handles to denote that at any given time no other entity of the same type and meaning shall exist in the OPC UA server with the same value. No further assumptions about global or historical uniqueness are made; especially in the case of identifiers, however, globally unique identifiers are recommended.

Joining System

The underlying joining system for which the OPC UA server provides an abstracted view.

Joining Process

The concrete implementation of a set of information that a machine needs to execute a joining operation.


A joint defines the properties of the point where several parts are joined.