Using the isabelle ontology framework: Linking the formal with the informal

This is the author accepted manuscript. The final version is available from the publisher via the DOI in this recordWhile Isabelle is mostly known as part of Isabelle/HOL (an interactive theorem prover), it actually provides a framework for developing a wide spectrum of applications. A particular strength of the Isabelle framework is the combination of text editing, formal verification, and code generation. Up to now, Isabelle’s document preparation system lacks a mechanism for ensuring the structure of different document types (as, e.g., required in certification processes) in general and, in particular, mechanism for linking informal and formal parts of a document. In this paper, we present Isabelle/DOF, a novel Document Ontology Framework on top of Isabelle. Isabelle/DOF allows for conventional typesetting as well as formal development. We show how to model document ontologies inside Isabelle/DOF, how to use the resulting meta-information for enforcing a certain document structure, and discuss ontology-specific IDE support

Using Deep Ontologies in Formal Software Engineering

This is the author accepted manuscript. The final version is available from Springer via the DOI on this recordIsabelle/DOF is an ontology framework on top of Isabelle. It allows for the formal development of ontologies as well as continuous conformity-checking of integrated documents annotated by ontological data. An integrated document may contain text, code, definitions, proofs, and user-programmed constructs supporting a wide range of formal methods. Isabelle/DOF is designed to leverage traceability in inte- grated documents by supporting navigation in Isabelle’s IDE as well as the document generation process. In this paper, we extend Isabelle/DOF with annotations of λ-terms, a pervasive data-structure underlying Isabelle used to syntactically represent expressions and formulas. Rather than introducing an own pro- gramming language for meta-data, we use Higher-order Logic (HOL) for expressions, data-constraints, ontological invariants, and queries via code-generation and reflection. This allows both for powerful query languages and logical reasoning over ontologies in, for example, ontological mappings. Our application examples cover documents targeting formal certifications such as CENELEC 50128 or Common Criteria