بهبود روش محاسبه مدخل ها در نمايه گردان جايگشتي

Improvement in calculating method of entries in permuterm indexing

Increase of different fields of science, and following it increase in volume of information and documents, researchers’ need to access them, and the necessity to accelerate their accessibility to information caused more reception from index and indexing. One of the methods of indexing titles of documents is permuterm indexing. Up to the present time, number of entries were calculated through formula n(n-1) and having number of accepted keywords. In this article a complementary method for calculating number of entries in each title, is presented. This method helps the indexer to calculate the number of entries, at the presence of semi-authorized terms, before writing them down.