As mentioned previously, class attributes are the parameters of the class and their values characterize the instance of the class. For example, the Length, Width and Height attributes of an instance of ug_block dictate the size of the resulting block while origin specifies where in space the block resides. When you create instances of KF classes, you can plug in the required values of the instance or use default class attribute values to create the instance.

You can check the class attributes of various KF classes through the Add Child Rule dialog box. If you select any class from the Class List box of the Add Child Rule dialog box, its attributes are display in the Input Parameters box.