News:
- December 2021: the license for Inter4QL 5.2 is changed to a 3-clause BSD License.
- April 2020: Inter4QL 5.1 and 5.2, developed by Łukasz Białek, are available.
- December 2019: Inter4QL 5.0, developed by Łukasz Białek, is available.
- August 2019: Inter4QL 4.1, developed by Łukasz Białek, is available.
- October 2018: Inter4QL 4.0, developed by Łukasz Białek, is available.
- July 2016: Inter4QL 3.1, developed by Łukasz Białek, is available.
- March 2016: Inter4QL 3.0, developed by Aleksander Bułanowski, is available.
- September 2015: 4qlModeler 2.0, developed by Maria Rekowska, is available.
- June 2015: Midas S.A. invests in Altalog Ltd.
- December 2014: version 2.5 of the Inter4QL interpreter, developed by Łukasz Białek, is available.
- November 2014: 4qlModeler 1.0, developed by Łukasz Makar, is available.
- September 2014: version 2.4 of the Inter4QL interpreter, developed by Łukasz Makar, is available.
- March 2014: version 2.3 of the Inter4QL interpreter, developed by Łukasz Białek, is available.
- December 2013: a commercial implementation of a knowledge base management system based on 4QL moves to Altalog Ltd.
- November 2013: version 2.2 of the Inter4QL interpreter, developed by Łukasz Białek, is available.
- September 2013: version 2.1 of the Inter4QL interpreter, developed by Łukasz Białek, is available.
- August 2013: a 4QL interpreter in C++, Inter4QL 2.0, developed by Łukasz Białek on the basis of Inter4QL 1.0, is available.
- May 2013: a generalized and at the same time simplified definition of well-supported models, together with a suitable algorithm, has been developed and is published in Partiality and Inconsistency in Agents’ Belief Bases (Proceedings of KES AMSTA'13).
- March 2013: a Polish National Science Centre project "Modeling robot cooperation using many-valued logic and concurrent information processing" using 4QL for specifying robots' knowledge bases, has started (run by the Institute of Fundamental Technological Research, Polish Academy of Sciences).
- November 2012: NASK invests in a commercial implementation of a knowledge base management system based on 4QL.
- September 2012: a 4QL Drools-based interpreter in Java, 4QL Runner, developed by Ł. Sobczyk, is available.
- June 2012: the paper Epistemic Profiles and Belief Structures by B. Dunin-Kęplicz and A. Szałas, using the 4QL technology, has been granted the best paper award at the KES AMSTA Conference.
- March 2012: Inter4QL 1.0 with a patch by G. Jaśkiewicz is available.
- December 2011: a Polish National Science Centre project "Development of Rule-based Query Languages Applied in Intelligent Systems" partially using/developing 4QL, has started (run by the Department of Mathematics, Informatics and Mechanics, University of Warsaw).
- August 2011: a 4QL interpreter in C++, Inter4QL 1.0, developed by P. Spanily, is available.