N-ary relation
+
–
–
A concept can be considered 0-ary relation, while relations can be considered to be N>0 relations. An N-ary relation is a general way to refer to something that is either a concept or a relation.
—, 18,320 3:02
子カテゴリはありません。
+[概念]
+[発想]
+[企画]
