*2nd International Joint Conference on Conceptual Knowledge Structures (CONCEPTS 2025)* *Cluj-Napoca, România- September, 8th-12th, 2025* *https://concepts2025.conference.ubbcluj.ro/ <https://concepts2025.conference.ubbcluj.ro/>* 29th Intl. Conf. on Conceptual Structures (ICCS) 19th Intl. Conf. on Formal Concept Analysis (ICFCA) 18th Intl. Conf. on Concept Lattices and their Applications (CLA) CONCEPTS, the International Conference on Conceptual Knowledge Structures is a merger of the three conferences CLA, ICCS, and ICFCA, which have been essential venues for researchers and practitioners working on theoretical and applied aspects of formal concept analysis and representation of conceptual knowledge, as well as closely related areas, such as data mining, information retrieval, knowledge management, and discovery. CONCEPTS 2025, the second conference in this new series, aims to continue the tradition and standards of previous conferences and to become a key annual meeting for all members of the three communities, CLA, ICCS, and ICFCA, to keep abreast of the advances and new challenges in the field. Main topics include but are not limited to: * Fundamental aspects of Formal Concept Analysis (e.g., FCA theory, concept lattices, algorithms and computational complexity) * Conceptual graphs, graph-based models for human reasoning * Knowledge spaces and learning spaces * Fuzzy, relational, and/or triadic conceptual structures * Conceptual knowledge acquisition, management, exploration, analysis, and/or visualization * Probabilistic or approximative approaches to conceptual knowledge * Bridging conceptual structures to information sciences, artificial intelligence, data mining, machine learning, information retrieval, database theory, software engineering, and other areas of computer science * Ontologies, semantic web, knowledge graphs, and their relation to conceptual knowledge structures such as concept lattices and conceptual graphs. * Conceptual structures in natural language processing and linguistics * Understanding real-world data and modeling real-world phenomena with conceptual structures (e.g., applications in digital humanities, cybersecurity, biology, medicine, social network analysis) * Psychology, philosophy, and conceptual structures. *Submission details:* Submissions are invited on significant, original (previously unpublished) research on the topics of the conference: * Journal-track papers up to 26 pages, to be published in a special issue of the<https://www.sciencedirect.com/journal/international-journal-of-appro… Journal of Approximate Reasoning (IJAR) <https://www.sciencedirect.com/journal/international-journal-of-approximate-reasoning>; * Regular papers up to 16 pages and short papers up to 8 pages are to be published by Springer in the LNAI series as a proceedings volume. All submissions will be subject to single-blind peer review. Accepted papers have to be presented at the conference on-site. Therefore, at least one author per paper has to register timely and attend the conference on-site. *Important dates and submission instructions:* /***Journal-track submissions***/ - Full paper submission: *March 16, 2025 (AoE)* - Paper reviews sent to authors: *May 2nd, 2025* - Revised submission: *June 2, 2025* - Notification of acceptance: *June 29, 2025*  Details about the submission system and the guidelines to authors will be provided shortly. /***Regular and short papers***/ - Abstract submission: *March 17, 2025 (AoE)* - Full paper submission: *March 24, 2025 (AoE)* - Notification of acceptance: *May 14, 2025* - Camera-ready papers due: *May 29, 2025* Submission link:<https://equinocs.springernature.com/home>https://equinocs.sprin… <https://equinocs.springernature.com/home> Please select the appropriate category for your submitted manuscript, “regular paper” or “short paper.” Please visit the page<https://www.springer.com/gp/computer-science/lncs/conference-procee… for authors <https://www.springer.com/gp/computer-science/lncs/conference-proceedings-guidelines> on Springer's website for templates and formatting style. *Organization:* _General and Conference Chair:_ Christian Săcărea, Babeș-Bolyai University, Romania _Program Chairs:_ Peggy Cellier, IRISA/INSA Rennes, France Bernhard Ganter, TU Dresden, Germany Rokia Missaoui, Université du Québec en Outaouais, Canada _Local organizer Committee:_ Christian Săcărea, Babeș-Bolyai University, Cluj-Napoca, România Diana Cristea, Babeș-Bolyai University, Cluj-Napoca, Diana Șotropa, Babeș-Bolyai University, Cluj-Napoca _Executive Board:_ Jaume Baixeries, Polytechnic University of Catalonia, Spain Radim Belohlavek, Palacký University Olomouc, Czech Republic Tanya Braun, University of Münster, Germany Madalina Croitoru, University of Montpellier, France Sébastien Ferré, University of Rennes, France Sergei Kuznetsov, HSE University, Moscow, Russia Rokia Missaoui, Université du Québec en Outaouais, Canada Amedeo Napoli, LORIA, Nancy, France Sergei Obiedkov, TU Dresden, Germany Manuel Ojeda-Aciego, University of Malaga, Spain Uta Priss, Ostfalia University of Applied Sciences, Wolfenbüttel, Germany Gerd Stumme, University of Kassel, Germany _Program Committee:_ Jaume Baixeries, Polytechnic University of Catalonia, Spain Alexandre Bazin, LIRMM, Montpellier, France Mike Behrisch, Technische Universität Wien, Austria Sadok Ben Yahia, Technology University of Tallinn, Estonia Karell Bertet, La Rochelle University, France Inma P. Cabrera, Universidad de Málaga, Spain Peggy Cellier, IRISA/INSA Rennes, France Maria Eugenia Cornejo Piñero, University of Cádiz, Spain Christophe Demko, La Rochelle University, France Xavier Dolques, Université de Strasbourg, France Dominik Dürrschnabel, Universität Kassel, Germany Sébastien Ferré, IRISA université de Rennes, France Bernhard Ganter, TU Dresden, Germany Alain Gely, université de Lorraine, France Tom Hanika, University of Hildesheim, Germany Tobias Hille, University of Kassel        Germany Marianne Huchard, LIRMM, Univ. Montpellier, France Mohamed Hamza Ibrahim, University of Quebec in Outaouais, Canada Dmitry Ignatov, HSE University, Moscow, Russia Mehdi Kaytoue, Infologic R&D, France Blaise Blériot Koguep Njionou, Université de Dschang, Cameroun Francesco Kriegel, TU Dresden, Germany Sergei Kuznetsov, HSE University, Moscow, Russia Leonard Kwuida, Bern University of Applied Sciences, Switzerland Florence Le Ber, Université de Strasbourg, France Pierre Martin, University of Montpellier, France Jesús Medina, University of Cádiz, Spain Rokia Missaoui, University of Quebec in Outaouais, Canada Amedeo Napoli, LORIA, Université de Lorraine, France Sergei Obiedkov, TU Dresden, Germany Manuel Ojeda-Aciego, Universidad de Málaga, Spain Jan Outrata, Palacký University Olomouc, Czech Republic Tim Pattison, Defence Science and Technology Group, Australia Carmen Peláez-Moreno, Univ. Carlos III de Madrid, Spain Uta Priss, Ostfalia Hochschule of Applied Sciences, Wolfenbüttel, Germany Sandor Radeleczki, University of Miskolc, Hungary Eloísa   Ramírez Poussa, Universidad de Cádiz, Spain Sebastian Rudolph, TU Dresden, Germany Baris Sertkaya, Frankfurt University of Applied Sciences, Germany Henry Soldano, Université Paris 13, France Petko Valtchev, Université du Québec à Montréal, Canada Gerd Stumme, University of Kassel, Germany Martin Trnecka, Palacký University Olomouc, Czech Republic Francisco José Valverde-Albacete, Univ. Rey Juan Carlos, Madrid, Spain  We look forward to meeting you in Cluj-Napoca. Please, feel free to contact us for any further information. Sincerely yours, Peggy Cellier, Bernhard Ganter, and Rokia Missaoui *CONCEPTS 2025 Program chairs* Email contact address: concepts25(a)lists.cs.uni-kassel.de