5 Fundamentals

5.1 Meta-model Mapping Approach

5.1.5 ISA95Property

ISA95Property is a concept to represent characteristics for domain specific information. Accordingly ISA-95 defines that attributes that are application or industry specific are to be modelled in terms of properties and represented in property classes in the model. ISA-95 doesn’t describe a property as an attribute in UML, but describes a property as a Class. In OPC UA it can be represented by VariableTypes and Variables (see Table 5)

Table 5 – Transformation rule of an ISA95Property

ISA-95	OPC UA	Description
UMLClass	VariableType	Structure of the ISA95Property is defined by a VariableType, and an instance of the ISA95Property is represented by a DataVariable of the VariableType.
	DataVariable

ISA-95	OPC UA	Description
UMLClass	VariableType	Structure of the ISA95Property is defined by a VariableType, and an instance of the ISA95Property is represented by a DataVariable of the VariableType.
	DataVariable