Sanyo Kokusaku Pulp Co., Ltd., Department of Patent Information constructed an inhouse database using an optical file and OCR. The system consists of a database where primary information is input in form of its image on an optical file, and a database where secondary information (bibliographic information and abstracts) is read by kanji OCR and then encoded. A thesaurus was not employed in the database of secondary information. Instead full-text searching was used there. Thus the system brings save-space for storing primary materials, save-labor for input work, and higher precision of intormation retrieval. This paper describes the inhouse database construction from its beginning, the background and the features. Also the author talks his own opinion and thought on inhouse database construction.
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