New Directions in Rough Sets Data Mining and Granular Soft Computing : 7th International Workshop RSFDGrC’99 Yamaguchi Japan November 9 11 1999. Proceedings This book constitutes the refereed proceedings of the 7th International Workshop on Rough Sets Fuzzy Sets Data Mining and Granular Soft Computing RSFDGrC99 held in Yamaguchi Japan in November 1999.The 45 revised regular papers and 15 revised short papers presented together with four invited contributions were carefully reviewed and selected from 89 submissions. The book is divided into sections on rough computing: foundations and applications rough set theory and applications fuzzy set theory and applications nonclassical logic and approximate reasoning information granulation and granular computing data mining and knowledge discovery machine learning and intelligent agents and systems