Fluent Editor 2014

Fluent Editor 2014

Fluent Editor 2014, an ontology editor, is an Award Winning comprehensive tool for editing and manipulating complex ontologies that uses Controlled Natural Language. Fluent Editor provides one with a more suitable for human users alternative to XML-based OWL editors. It's main feature is the usage of Controlled English as a knowledge modeling language. Supported via Predictive Editor, it prohibits one from entering any sentence that is grammatically or morphologically incorrect and actively helps the user during sentence writing.

Recognised by:

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.

Fluent Editor 2014 is FREE for non-commercial (i.e. personal or academic) usage.

If you want to use it commercially (within your company, enterprise and any other commercial purposes), you need to obtain proper commercial license.


Main Features

  • CNLOWL implementation
    Implementation of CNLOWL. Fluent Editor grammar is compatible with OWL-DL and OWL2.
  • OWL 2.0 full compliance
    Full compliance with OWL 2.0 standard from W3C.
    Compatible with OWL API, which allows it to be used in cooperation with other tools.
  • SWRL compliance
    User can import existing ontologies from OWL files.
  • Dynamic referencing external OWL ontologies
    CNL documents can dynamicaly reference external OWL's from Web or disk.
  • Predictive Edition Support
    Users have enhanced support by predictive editor.
  • Built-in dictionary
    Built-in dictionary makes easier to avoid misspelling errors.
  • Advanced User Interface -> opening semantic technologies for inexperienced users
    FluentEditor provides several enhancements for less advanced users to start working with OWL ontologies.
  • In-place error resolving support
    FluentEditor provides direct information about possible errors with hints on how to resolve them.
  • Importing existing ontologies
    Users can directly import to CNL any external ontology which is available on the Internet.
  • English morphology and syntax
    FluentEditor uses Controled English whose grammar is based on common English morphology and syntax.
  • Ambiguity resolution (shortnames management)
    FluentEditor keeps track of ambiguities of concepts and/or instance names imported from different external ontologies. Users can still use short names of those elements.

Fluent Editor 2014 in action

You can have a look at Fluent Editor in action with screencasts below:


OWL stands for Web Ontology Language (sometimes called Ontology Web Languagea language). It is developed by the W3C’s Web Ontology Working Group and intended to be the successor of DAML+OIL. OWL is the most expressive knowledge representation for the Semantic Web so far. It allows one to write explicit, formal conceptualizations of human endeavor. OWL can be used in a spectrum of tasks that appear in the semantic-web applications. It allows describing the application domain (where formal-semantic plays a crucial role) and application specification, database schema, database constraints as well as database content using common language. On the other hand, OWL can be used as a language that allows domain experts (a person with special knowledge or skills in a particular area of endeavor) to express domain-specific knowledge (valid knowledge used to refer to an area of human endeavor).


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