Definitions
- Object - a physical object, such as a (computer) folder, file, screw, bolt, etc.
- Attribute - identifies an object, such as Date Created, Height, Length, etc.
- Class - a set of objects that share common structure and common attributes.
- Super-class - the topmost class in any class tree.
- Sub-class - inherits the attributes of its parent class; additional attributes specific to the sub-class can be added.
- Leaf class - the last class in the class tree structure.