FluentEditor for OWL is comprehensive tool for editing andmanipulating complex ontologies using Controlled Natural Language.
Fluent editor provides alternative to XML-based OWL editors that is better suitable for human users.
It's main feature is using Controlled English as a knowledge modeling language. Supported via Predictive Editor prohibits one to enter any sentence that is not grammatically or morphologically correct and actively help the user during sentence writing. The Controlled English is a subset of Standard English with restricted grammar and vocabulary in order to reduce the ambiguity and complexity inherent in full English.