Modeling OWL with Rules: The ROWL Protege Plugin
  In our experience, some ontology users find it much easier to convey logical
statements using rules rather than OWL (or description logic) axioms. Based on
recent theoretical developments on transformations between rules and
description logics, we develop ROWL, a Protege plugin that allows users to
enter OWL axioms by way of rules; the plugin then automatically converts these
rules into OWL DL axioms if possible, and prompts the user in case such a
conversion is not possible without weakening the semantics of the rule.
