Electronic document significant updating detection apparatus, electronic document significant updating detection method; electronic document significant updating detection program, and recording medium on which electronic document significant updating detection program is recording

摘要

In this invention, an electronic document to be detected and an electronic document to be compared are loaded, and a difference between important parts of the electronic document to be detected and the electronic document to be compared is detected. The difference between the important parts is obtained by (1) performing difference detection after the important parts are extracted from the electronic documents, (2) checking whether the differences are significant differences or not after the difference between both the entire electronic documents, or (3) performing difference detection after the important parts of the electronic documents are extracted and determining whether the difference is a significant difference or not.