Advances in Knowledge Discovery and Data Mining : 7th Pacific Asia Conference PAKDD 2003 Seoul Korea April 30 – May 2 2003 Proceedings This book constitutes the refereed proceedings of the 7th Pacific Asia Conference on Knowledge Discovery and Data Mining PAKDD 2003 held in Seoul Korea in April Mai 2003. The 38 revised full papers and 20 revised short papers presented together with two invited industrial contributions were carefully reviewed and selected from 215 submissions. The papers are presented in topical sections on stream mining graph mining clustering text mining Bayesian networks association rules semi structured data mining classification data analysis and feature selection