Subordination refers to the relationship between the concepts with smaller extension and those with larger extension. For example, if the concept "logic textbook" of A is included in the concept "textbook" of B, there is a subordinate relationship between A and B, that is, A is a subordinate of B. [1]
The generic relationship is the relationship between the concept with larger extension and the concept with smaller extension. If A concept "textbook" includes B concept "logic textbook", A and B have a superior relationship, that is, A is the previous session of B.
