Different methodological guidelines, lack of clarity in designing curriculum modules, as well as the diversity of definitions and conceptions presents in the competence approach are drawbacks for designers of competency-based curricula. This paper presents a system designed under an ontological approach, which aims to support the design of competency-based curricula. The system emphasizes aspects such as graduate profiles and curriculum modules. The ontology is a framework to formally describe the domain knowledge of curriculum design, ensuring a consistent and unambiguous vocabulary.