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LIST OF RELATIONSHIPS AND WEIGHTS  With respect to their meaning, union and intersection relation are given the same weights as subclasses relation. For example, if class A is the union of C, B, and D, then each class C, B, and D is a subClassOf A. If disjoint relation exists between high-level concepts, the weight is considered to be zero, but if it occurs in low-level concepts, the weight is considered to be 10 [15].

Table 1 LIST OF RELATIONSHIPS AND WEIGHTS With respect to their meaning, union and intersection relation are given the same weights as subclasses relation. For example, if class A is the union of C, B, and D, then each class C, B, and D is a subClassOf A. If disjoint relation exists between high-level concepts, the weight is considered to be zero, but if it occurs in low-level concepts, the weight is considered to be 10 [15].