https://citeseerx.ist.psu.edu/document?repid=rep1&type=pdf&doi=a5db01c09691ef6da94774aedb7aca037c0fcbff Cafezeiro, I., Haeusler, E.H.: Semantic interoperability via category theory. In: Conferences in Research and Practice in Information Technology, vol. 83 (2006) Abstract The paper uses categorical limit and colimit to define operations of breaking and composing ontologies, formalizing usual concepts in ontologies (alignment, merge, integration, matching) and proposing a new operation (the hide operation). 1 Introduction In addition, restrictions are stated by the use of logical axioms given in some expressive language whose model-theoretic semantics provides meaning. [Além de classes e propriedades Ontologias também tem regras mas não fala de instâncias] Category Theory is an appropriate formal framework. First of all, because of the focus that is put in relationship (categorical morphisms) and not in entities (categorical object). In agreement with (i), entities are describe