Conceptual Modeling - Er 2002 21st International Conference On Conceptual Modeli

For More Than 20 Years, The Series Of Conceptual Modeling - Er Conferences Has Provided A Forum For Research Communities And Practitioners To Present And - Change Research Results And Practical Experiences In The?elds Of Database Design And Conceptual Modeling. Throughout The Years, The Scope Of These Conferences Has Extended From Database Design And Speci?c Topics Of That Area To More U- Versal Or Re?ned Conceptual Modeling, Organizing Originally Weak Or Ill-structured Information Or Knowledge In More Cultured Ways By Applying Various Kinds Of Principles, Abstract Models, And Theories, For Di?erent Purposes. At The Same Time, Many Technically Oriented Approaches Have Been Developed Which Aim To Facilitate The Implementation Of Rather Advanced Conceptual Models.