Nowadays the ontology engineering field does not have any method that guides ontology practitioners when planning and scheduling their ontology development projects. The field also lacks the tools that help ontology practitioners to plan, schedule, and execute such projects. This paper tries to contribute to the solution of these problems by proposing the identification of two ontology life cycle models, the definition of the methodological basis for scheduling ontology projects, and a tool called gOntt that (1) supports the scheduling of ontology developments and (2) helps to execute such development projects.
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