Interface definitions - HxGN SDx - Update 64 - Administration & Configuration

Although the COM rules state that that interfaces are immutable, the rules for existing interface definitions in the SmartPlant schema are not so rigid.

• The UID property cannot be changed

• The Name property cannot be changed

• The Description, SpecializationValue, InterfaceIcon, and PropertyCategory properties of an interface definition can be changed

• Optional property definitions can be added to an interface definition

• Existing property definitions exposed by the interface definition cannot be deleted

• Required property definitions cannot be changed to optional definitions

• Optional property definitions cannot be changed to required definitions

• Existing Implies relationships cannot be deleted

• New optional Implies relationships can be added

• Required Implies relationships cannot be changed to optional Implies relationships

• Optional Implies relationships cannot be changed to required Implies relationships

An example of an interface definition and its properties