DOF is a novel framework for defining ontologies and en- forcing them during document development and document evolution. A major goal of DOF is the integrated development of formal certification documents (e.g., for Common Criteria or CENELEC 50128) that require consistency across both formal and informal arguments.

To support a consistent development of formal and informal parts of a document, we provide Isabelle/DOF, an implementation of DOF on top of Isabelle/HOL. Isabelle/DOF is integrated into Isabelle’s IDE, which allows for smooth ontology development as well as immediate ontological feedback during the editing of a document.

In our SEFM paper [1], we give an in-depth presentation of the design concepts of DOF’s Ontology Definition Language (ODL) and key aspects of the technology of its implementation. Isabelle/DOF is the first ontology language supporting machine-checked links between the formal and informal parts in an LCF-style interactive theorem proving environment. Sufficiently annotated, large documents can easily be developed collaboratively, while ensuring their consistency, and the impact of changes (in the formal and the semiformal content) is tracked automatically.

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