What is a Concept Tree?

Two or more high-level concepts together define another high-level concept. For example, the concept of motor vehicle (mentioned above) and the concept non-motor vehicle defined by the set of terms “carriage,” “trailer,” and “railcar” define the high-level concept vehicle. The base concepts “carriage,” “trailer,” and “railcar” are viewed as children of the high-level concept non-motor vehicle, which is viewed as the parent of the base concepts.

Similarly, the concept vehicle, together with other concepts, can define yet another high-level concept. Concepts of different abstraction levels can be organized in a hierarchical structure in this manner. This hierarchy of concepts is called a concept tree.