Konclude is released as free software under the version 3.0 of the GNU Lesser General Public License (LGPL) as published by the Free Software Foundation. A copy of the GPL v3.0 is available at

Note, Konclude is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose. See the GNU Lesser General Public License for more details.


Konclude uses the cross-platform development framework Qt. As of now Konclude requires Qt libraries 5.11 or later which can be found at Optionally, the Redland RDF Libraries ( can be integrated into Konclude for handling more complex SPARQL queries and for loading OWL/RDF files.

On Windows-based platforms it is further necessary to install the .Net Framework 4.0 and the Microsoft Visual C++ 2015 Redistributable Package:

Release Notes v0.7.0

  • Several minor bug fixes and improvements
  • (Limited) SPARQL support via Redland Rasqal
  • Support for conjunctive query answering and other complex queries (e.g., complex instance queries)
  • Support for role classification and realization
  • Experimental support of RDF serializations of ontologies via the Redland RDF libraries
  • New parallelized consistency checking and parallel conjunctive query answering
  • Release date: March 16, 2021

Release Notes v0.6.2

  • Several minor bug fixes
  • Release date: October 27, 2015

Release Notes v0.6.1

  • Several bug fixes
  • Minor performance improvements
  • Release date: Mai 1, 2015

Release Notes v0.6.0

  • Several fixed bugs and memory leaks
  • Many performance improvements (especially for realisation)
  • Improved error reporting
  • Almost complete datatype support
  • OWL 2 Functional Style support
  • Loading of ontologies via HTTP and FTP
  • Release date: September 18, 2014

Release Notes v0.5.0

  • Initial release of Konclude
  • Release date: November 18, 2013