14. The update detecting apparatus according to claim 12 , wherein the text data included in said target file relates to medical diagnosis, and said structured data is structured data including an element having an attribute of medical care.
14. The update detecting apparatus according to claim 12 , wherein the text data included in said target file relates to medical diagnosis, and said structured data is structured data including an element having an attribute of medical care. 15. The update detecting apparatus according to claim 14 , wherein said predetermined condition is set so that an update related to a substantial change in a medical diagnosis can be detected.