Abstract
In electronic delivery of engineering works and construction fields, the standard is settled and the base is adequately maintained by the initiative of the Ministry of Land, Infrastructure and Transport. But, problems arise in the actual electronic delivery. These problems are that when order supplier and order demander exchange data, the significantly identity is not assured enough and the coexistence of similar data increase the work cost. Currently, a special application for document processing is being introduced as means to solve these problems. But, it is not a technique for fundamentally solving the problem. In this research, the layout of the document data made by a variety of data forms was analyzed, and its structural information was created. The substantial difference between documents is extracted by analyzing meaning information using the natural-language processing, and the identity is verified. In addition, document management is made more efficient by presenting detailed difference information.
