Invited Lectures: Knowledge about Knowledge in Databases (J. McCarthy) (Title only). Integrity Constraints for Knowledge Bases (R. Reiter). Discussion. Knowledge Representation in Databases, Expert Systems, and Natural Language (J.F. Sowa). Discussion. Full Papers: Information Systems Design: An Expert System Approach (C. Cauvet, C. Proix, C. Rolland). Logical Support for Reasoning about the Specification and the Elaboration of Requirements (E. Dubois). Inheritances with Exceptions: An Approach Based on Semantic Tolerance (C. Esculier). Knowledge-Based Information Analysis Support (E.D. Falkenberg, H. van Kempen, N. Mimpen). A Self-Referential Data Model of Knowledge (Y.J. Jiang). Integrating Advanced Techniques into Multimedia DBMS (V.Y. Lum, C.T. Wu, D.K. Hsiao). HITKMS: A Knowledge Base Machine System Supporting Cooperative Expert-System and Experiential Learning (Mingzeng Hu et al.). Heuristic Control on Dynamic Database Objects (G.T. Nguyen, D. Rieu). Temporal Reasoning in Data Base (Wei Qian, Zhaokeng Zhao). The Role of AI in Databases versus the Role of Database Theory in AI: An Opinion (E.A. Rundensteiner). The Design of a Knowledge-Based Economic Modeling Tool (EMT) Prototype (J. Schiff). A Knowledge-Based Approach to Overcome Structural Differences in Object Oriented Database Integration (M. Schrefl, E.J. Neuhold). Object-Oriented Conceptual Modeling from Law (C. Sernadas, J. Fiadeiro, A. Sernadas). LQL: A Unified Language for Deductive Database Systems (J. Shao, D.A. Bell, M.E.C. Hull). Data Dependency and Undecidability in a Model of Historical Information System (Changjie Tang, Bowen Yin). Representing Facts in KEE's Frame Language (S. Twine). MEX-1: An Expert System Shell (Wan Jian-Cheng, Zhou Cheng-Hua). Algebraic Specification of Object Dynamics in Knowledge Base Domains (R. Wieringa, R. van de Riet). Diagnosis of Conceptual Schemes (R. Wohed). Rule Rewriting Methods in the Implementation of the Logic Data Language LDL (C. Zaniolo, D. Sacca). A Model for Maintaining Compiled Prolog Databases (Zhang Chenxi, Tzu Yungui). QKBMS/75 - A Knowledge Base Management System Growing from Relational DBMS and Logic Programming Language (Zhou Lizhu et al.). Plus Eight Short Papers