Preface to Onto.Com 2011

This volume collects articles presented at the first edition of the International Workshop on Ontologies and Conceptual Modeling (Onto.Com 2011). This workshop was organized as an activity of the Special Interest Group on Ontologies and Conceptual Modeling of the International Association of Ontologies and Applications (IAOA). It was held in the context of the 30 th International Conference on Conceptual Modeling (ER 2011), in Brussels, Belgium. Moreover, the workshop was designed with the main goal of discussing the role played by formal ontology, philosophical logics, cognitive sciences and linguistics, as well as empirical studies in the development of theoretical foundations and engineering tools for conceptual modeling.