OWLSharp

OWLSharp is a .NET library built atop RDFSharp with the goal of delivering expressivity for ontology:

Modeling

• Create and manage OWL2 ontologies (classes, properties, individuals, expressions, axioms, rules, ...)
• Exchange them using standard OWL2 formats (OWL2/XML, OWL2/Manchester)

Reasoning

• Apply forward-chain inference to derive knowledge that is entailed but not stated (26 rules)
• Create, exchange and execute SWRL rules encoding domain-specific logic deductions

Validation

• Detect pitfalls, structural inconsistencies and constraint violations (29 rules)

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Along with core features, it also includes a set of extensions for working with LinkedData ontologies!