Conceptual Modeling ER 97 : 16th International Conference on Conceptual Modeling Los Angeles California USA November3 5 1997 Proceedings This book constitutes the refereed proceedings of the 16th International Conference on Conceptual Modeling ER 97 held in Los Angeles California USA in November 1997. The 32 revised full papers presented in the book were carefully selected from a total of 93 submissions. Also included are two full invited papers.The volume is divided in topical sections on automated design temporal modeling languages activity modeling applied modeling object oriented modeling theoretical issues in modeling experience and applications distributed systems integration and tools