抄録
133,251 terms extracted from biological books and dictionaries were processed to automatically extract semantic relations among terms such as hierarchical and equivalent relations. A total of 2,574,099 relations were extracted. Extracted terms represent biological concepts, thus extracted relations define the biological conceptual structure. The network structure of constructed conceptual structure from a fixed viewpoint shows a structure of double scale-free network, with the border on concepts with 1,000 relations.
