Rules in Database Systems : Third International Workshop RIDS 97 Skövde Sweden June 26 28 1997 Proceedings This book constitutes the strictly refereed post workshop proceedings of the Third International Workshop on Rules in Database Systems RIDS 97 held in Skövde June 1997. The 13 revised papers presented in the book were carefully reviewed and selected from 33 submissions. The book documents the state of the art in the area. The papers are devoted to deductive databases active database systems architectures events in workflow management rule modelling and simulation rule confluence rule termination analysis rule testing and validation active database systems design