This book constitutes the refereed proceedings of 7 workshops, held at the 42nd International Conference on Conceptual Modeling, ER 2023, held in Lisbon, Portugal, during November 6-9, 2023.The 28 full and 2 short papers were carefully reviewed and selected out of 53 submissions. Topics of interest span the entire spectrum of conceptual modeling, including research and practice in areas such as theories of concepts and ontologies, techniques for transforming conceptual models into effective implementations, and methods and tools for developing and communicating conceptual models. The following workshops are included in this volume: CMLS 4th International Workshop on Conceptual Modeling for Life Sciences;CMOMM4FAIR Third Workshop on Conceptual Modeling, Ontologies and (Meta)data Management for Findable, Accessible, Interoperable, and Reusable (FAIR) Data;EmpER 6th International Workshop on Empirical Methodsin Conceptual Modeling;JUSMOD Second International Workshop on Digital Justice, Digital Law and Conceptual Modeling;OntoCom 9th International Workshop on Ontologies and Conceptual Modeling;QUAMES 4th International Workshop on Quality and Measurement of Model-Driven Software Development;SmartFood First Workshop on Controlled Vocabularies and Data Platforms for Smart Food Systems. 

This book constitutes the refereed proceedings of 7 workshops, held at the 42nd International Conference on Conceptual Modeling, ER 2023, held in Lisbon, Portugal, during November 6-9, 2023.The 28 full and 2 short papers were carefully reviewed and selected out of 53 submissions. Topics of interest span the entire spectrum of conceptual modeling, including research and practice in areas such as theories of concepts and ontologies, techniques for transforming conceptual models into effective implementations, and methods and tools for developing and communicating conceptual models. The following workshops are included in this volume: CMLS 4th International Workshop on Conceptual Modeling for Life Sciences;CMOMM4FAIR Third Workshop on Conceptual Modeling, Ontologies and (Meta)data Management for Findable, Accessible, Interoperable, and Reusable (FAIR) Data;EmpER 6th International Workshop on Empirical Methodsin Conceptual Modeling;JUSMOD Second International Workshop on Digital Justice, Digital Law and Conceptual Modeling;OntoCom 9th International Workshop on Ontologies and Conceptual Modeling;QUAMES 4th International Workshop on Quality and Measurement of Model-Driven Software Development;SmartFood First Workshop on Controlled Vocabularies and Data Platforms for Smart Food Systems.