Extending Standards

Like other coding languages for objects, you can extend a Standard to duplicate a table for separate use. You can extend a Standard by creating a new Standard with the Standard name and reference, followed by the Standard reference of the existing Standard prepended by an @. 

    
    new_std: NSTD: @STDREF

A classic example is vehicle applications and types. 

    
    truck: TRCK: @VHL

You can give your extended Standard additional properties by adding constraints. In the example below, TRCK will have the same constraints as VHL in addition to the owner and max_weight constraint. 

    
    truck: TRCK: @VHL {
        protected owner standard @PER OWNR *
        protected max_weight double MXWGHT
    }