Foundations of Intelligent Systems

This book constitutes the proceedings of the 28th International Symposium on Methodologies for Intelligent Systems, ISMIS 2026, held in Lyon, France, during July 22–24, 2026. The 19 full papers and 5 industrial papers presented in this volume were carefully reviewed and selected from 44 submissions. The papers are organized in the following topical sections: Invited talks; Knowledge Representation and Formal Reasoning;Generative and Representation Learning; Reliability, Safety and Explainable AI; Industry Session; and Time Series and Stream Data.