Wissenschaftliche Artikel

Ahmetaj, S., Löhnert, B., Ortiz de la Fuente, M. M., & Simkus, M. (2022). Magic Shapes for SHACL Validation. Proceedings of the VLDB Endowment, 15(10), 2284--2296. https://doi.org/10.14778/3547305.3547329 ( reposiTUm)
Ahmetaj, S., Ortiz, M., & Šimkus, M. (2020). Polynomial rewritings from expressive Description Logics with closed predicates to variants of Datalog. Artificial Intelligence, 280(103220), 103220. https://doi.org/10.1016/j.artint.2019.103220 ( reposiTUm)
Abiteboul, S., Arenas, M., Barceló, P., Bienvenu, M., Calvanese, D., David, C., Hull, R., Hüllermeier, E., Kimelfeld, B., Libkin, L., Martens, W., Milo, T., Murlak, F., Neven, F., Ortiz de la Fuente, M. M., Schwentick, T., Stoyanovich, J., Su, J., Suciu, D., … Yi, K. (2018). Research Directions for Principles of Data Management (Dagstuhl Perspectives Workshop 16151). Dagstuhl Manifestos, 7(1), 1–29. https://doi.org/10.4230/DagMan.7.1.1 ( reposiTUm)
Ahmetaj, S., Calvanese, D., Ortiz de la Fuente, M. M., & Simkus, M. (2017). Managing Change in Graph-Structured Data Using Description Logics. ACM Transactions on Computational Logic, 18(4), 1–35. https://doi.org/10.1145/3143803 ( reposiTUm)
Abiteboul, S., Arenas, M., Barceló, P., Bienvenu, M., Calvanese, D., David, C., Hull, R., Hüllermeier, E., Kimelfeld, B., Libkin, L., Martens, W., Milo, T., Murlak, F., Neven, F., Ortiz, M., Schwentick, T., Stoyanovich, J., Su, J., Suciu, D., … Yi, K. (2016). Research Directions for Principles of Data Management (Abridged). ACM SIGMOD Record, 45(4), 5–17. https://doi.org/10.1145/3092931.3092933 ( reposiTUm)
Bienvenu, M., Ortiz, M., & Simkus, M. (2015). Regular Path Queries in Lightweight Description Logics: Complexity and Algorithms. Journal of Artificial Intelligence Research, 53, 315–374. https://doi.org/10.1613/jair.4577 ( reposiTUm)
Calvanese, D., Eiter, T., & Ortiz, M. (2014). Answering Regular Path Queries in Expressive Description Logics via Alternating Tree-Automata. Information and Computation, 237, 12–55. https://doi.org/10.1016/j.ic.2014.04.002 ( reposiTUm)
Calvanese, D., Ortiz, M., Simkus, M., & Stefanoni, G. (2013). Reasoning about Explanations for Negative Query Answers in DL-Lite. Journal of Artificial Intelligence Research, 48, 635–669. https://doi.org/10.1613/jair.3870 ( reposiTUm)
Eiter, T., Ortiz, M., & Šimkus, M. (2012). Conjunctive query answering in the description logic SH using knots. Journal of Computer and System Sciences, 78(1), 47–85. https://doi.org/10.1016/j.jcss.2011.02.012 ( reposiTUm)
Ortiz, M., Calvanese, D., & Eiter, T. (2008). Data complexity of query answering in expressive Description Logics via tableaux. Journal of Automated Reasoning, 41(1), 61–98. https://doi.org/10.1007/s10817-008-9102-9 ( reposiTUm)
Ortiz, M., & Osorio, M. (2007). Strong Negation and Equivalence in the Safe Belief Semantics. Journal of Logic and Computation, 17(3), 499–515. https://doi.org/10.1093/logcom/exm011 ( reposiTUm)

Beiträge in Tagungsbänden

Ahmetaj, S., Ortiz, M., Oudshoorn, A., & Šimkus, M. (2023). Reconciling SHACL and Ontologies: Semantics and Validation via Rewriting. In K. Gal, A. Nowé, G. J. Nalepa, R. Fairstein, & R. Rădulescu (Eds.), ECAI 2023 : 26th European Conference on Artificial Intelligence, September 30–October 4, 2023, Kraków, Poland. Including 12th Conference on Prestigious Applications of Intelligent Systems (PAIS 2023). Proceedings (pp. 27–35). IOS Press. https://doi.org/10.3233/FAIA230250 ( reposiTUm)
Lukumbuzya, S., Ortiz de la Fuente, M. M., & Simkus, M. (2023). On the Expressive Power of Ontology-Mediated Queries: Capturing coNP. In O. Kutz, C. Lutz, & A. Ozaki (Eds.), Proceedings of the 36th International Workshop on Description Logics (DL 2023) co-located with the 20th International Conference on Principles of Knowledge Representation and Reasoning  (KR 2023). CEUR-WS.org. https://doi.org/10.34726/5333 ( reposiTUm)
Bonatti, P., Di Stefano, F., Ortiz, M., & Šimkus, M. (2023). Circumscription in DL-Lite: Progress Report. In O. Kutz, C. Lutz, & A. Ozaki (Eds.), Proceedings of the 36th International Workshop on Description Logics (DL 2023) co-located with the 20th International Conference on Principles of Knowledge Representation and Reasoning  (KR 2023). CEUR-WS.org. https://doi.org/10.34726/5328 ( reposiTUm)
Ahmetaj, S., Ortiz de la Fuente, M. M., Oudshoorn, A. M., & Simkus, M. (2023). Reconciling SHACL and Ontologies: Semantics and Validation via Rewriting (Extended Abstract). In Proceedings of the 36th International Workshop on Description Logics (DL 2023), co-located with the 20th International Conference on Principles of Knowledge Representation and Reasoning and the 21st International Workshop on Non-Monotonic Reasoning (KR 2023 and NMR 2023). 36th International Workshop on Description Logics (DL 2023), Rhodos, Greece. CEUR-WS.org. https://doi.org/10.34726/5397 ( reposiTUm)
Di Stefano, F., Ortiz, M., & Šimkus, M. (2023). Description Logics with Pointwise Circumscription. In E. Elking (Ed.), Proceedings of the Thirty-Second International Joint Conference on Artificial Intelligence (IJCAI-23) (pp. 3167–3175). International Joint Conferences on Artificial Intelligence. https://doi.org/10.24963/ijcai.2023/353 ( reposiTUm)
Cauli, C., Ortiz, M., & Piterman, N. (2022). Actions over Core-Closed Knowledge Bases. In J. Blanchette, L. Kovacs, & D. Pattinson (Eds.), Automated Reasoning.  IJCAR 2022 (pp. 281–299). Springer. https://doi.org/10.1007/978-3-031-10769-6_17 ( reposiTUm)
Ahmetaj, S., Loehnert, B., Ortiz de la Fuente, M. M., & Simkus, M. (2021). Magic Shapes for Validation in SHACL. In Proceedings of the ISWC 2021 Posters, Demos and Industry Tracks: From Novel Ideas to Industrial Practice co-located with 20th International Semantic Web Conference (ISWC 2021). ISWC 2021 - The 20th International Semantic Web Conference, online event, International. CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/55686 ( reposiTUm)
Cauli, C., Ortiz, M., & Piterman, N. (2021). Closed- and Open-world Reasoning in DL-Lite for Cloud Infrastructure Security. In Proceedings of the Eighteenth International Conference on Principles of Knowledge Representation and Reasoning. KR 2021 - 18th International Conference on Principles of Knowledge Representation and Reasoning, virtual event, International. https://doi.org/10.24963/kr.2021/17 ( reposiTUm)
Cauli, C., Ortiz de la Fuente, M. M., & Piterman, N. (2021). Closed- and Open-world Reasoning in DL-Lite for Cloud Infrastructure Security (Extended Abstract). In Proceedings of the 34th International Workshop on Description Logics (DL 2021). International Workshop on Description Logics, Wien, Austria. CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/58750 ( reposiTUm)
Ahmetaj, S., David, R., Ortiz de la Fuente, M. M., Polleres, A., Shehu, B., & Simkus, M. (2021). Reasoning about Explanations for Non-validation in SHACL (Extended abstract). In Proceedings of the 34th International Workshop on Description Logics (DL 2021). International Workshop on Description Logics (DL), Windermere, Lake District, UK, EU. CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/55685 ( reposiTUm)
Ahmetaj, S., David, R., Ortiz, M., Polleres, A., Shehu, B., & Šimkus, M. (2021). Reasoning about Explanations for Non-validation in SHACL. In Proceedings of the Eighteenth International Conference on Principles of Knowledge Representation and Reasoning. KR 2021 - 18th International Conference on Principles of Knowledge Representation and Reasoning, virtual event, International. https://doi.org/10.24963/kr.2021/2 ( reposiTUm)
Ortiz de la Fuente, M. M. (2021). Ontologies for On-Demand Designof Data-Centric Systems. In Formal Concept Analysis. International Conference on Formal Concept Analysis ICFCA, Strasbourg, France, EU. Springer Lecture Notes in Computer Science. http://hdl.handle.net/20.500.12708/55671 ( reposiTUm)
Andresel, M., Corman, J., Ortiz, M., Reutter, J. L., Savkovic, O., & Simkus, M. (2020). Stable Model Semantics for Recursive SHACL. In Proceedings of The Web Conference 2020. International World Wide Web Conference (WWW), UK, EU. ACM. https://doi.org/10.1145/3366423.3380229 ( reposiTUm)
Andresel, M., Ortiz, M., & Simkus, M. (2020). Query Rewriting for Ontology-Mediated Conditional Answers. In V. Conitzer & F. Sha (Eds.), Proceedings of the AAAI Conference on Artificial Intelligence (pp. 2734–2741). AAAI-20 Technical Tracks. https://doi.org/10.1609/aaai.v34i03.5660 ( reposiTUm)
Labai, N., Kotek, T., Ortiz, M., & Veith, H. (2020). Pebble-Intervals Automata and FO$$^2$$ with Two Orders. In Language and Automata Theory and Applications (pp. 208–221). Lecture Notes in Computer Science (LNCS). https://doi.org/10.1007/978-3-030-40608-0_14 ( reposiTUm)
Gogacz, T., Lukumbuzya, S., Simkus, M., & Ortiz de la Fuente, M. M. (2020). Datalog Rewritability and Data Complexity of ALCHOIF with Closed Predicates. In D. Calvanese, E. Erdem, & M. Thielscher (Eds.), Proceedings of the Seventeenth International Conference on Principles of Knowledge Representation and Reasoning. AAAI Press. https://doi.org/10.24963/kr.2020/44 ( reposiTUm)
Gogacz, T., Gutierrez-Basulto, V., Ibanez Garcia, Y. A., Murlak, F., Ortiz de la Fuente, M. M., & Simkus, M. (2020). Ontology Focusing: Knowledge-Enriched Databases on Demand. In ECAI 2020 - 24th European Conference on Artificial Intelligence (pp. 745–752). Frontiers in Artificial Intelligence and Applications. http://hdl.handle.net/20.500.12708/55576 ( reposiTUm)
Labai, N., Simkus, M., & Ortiz de la Fuente, M. M. (2020). An ExpTime Upper Bound for ALC with Integers. In D. Calvanese, E. Erdem, & M. Thielscher (Eds.), Proceedings of the Seventeenth International Conference on Principles of Knowledge Representation and Reasoning. AAAI Press. https://doi.org/10.24963/kr.2020/61 ( reposiTUm)
Ortiz de la Fuente, M. M., Simkus, M., & Lukumbuzya, S. (2020). Resilient Logic Programs: Answer Set Programs Challenged by Ontologies. In V. Conitzer & F. Sha (Eds.), Proceedings of the AAAI Conference on Artificial Intelligence (pp. 2917–2924). AAAI-20 Technical Tracks. https://doi.org/10.1609/aaai.v34i03.5683 ( reposiTUm)
Andresel, M.-P., Ibanez Garcia, Y. A., & Ortiz de la Fuente, M. M. (2020). A Framework for Exploratory Query Answering with Ontologies. In Proceedings of the 33rd International Workshop on Description Logics (DL 2020) co-located with the 17th International Conference on Principles of Knowledge Representation and Reasoning (KR 2020). Proceedings of the 33rd International Workshop on Description Logics (DL 2020) co-located with the 17th International Conference on Principles of Knowledge Representation and Reasoning (KR 2020), Rhodes, Greece, EU. CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/55577 ( reposiTUm)
Ortiz de la Fuente, M. M. (2020). Rewritability Results for OMQs with Closed Predicates. In Proceedings of the 33rd International Workshop on Description Logics (DL 2020) co-located with the 17th International Conference on Principles of Knowledge Representation and Reasoning (KR 2020). Proceedings of the 33rd International Workshop on Description Logics (DL 2020) co-located with the 17th International Conference on Principles of Knowledge Representation and Reasoning (KR 2020), Rhodes, Greece, EU. CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/55578 ( reposiTUm)
Bajraktari, L., Ortiz de la Fuente, M. M., & Xiao, G. (2019). Optimizing Horn-SHIQ Reasoning for OBDA. In Lecture Notes in Computer Science. ISWC 2019 - International Semantic Web Conference, Auckland, New Zealand, Non-EU. Springer. https://doi.org/10.1007/978-3-030-30793-6 ( reposiTUm)
Andresel, M.-P., Ibanez Garcia, Y. A., Ortiz de la Fuente, M. M., & Simkus, M. (2019). Relaxing and Restraining Queries for OBDA. In Proceedings of the AAAI Conference on Artificial Intelligence (pp. 2654–2661). https://doi.org/10.1609/aaai.v33i01.33012654 ( reposiTUm)
Ortiz de la Fuente, M. M., Simkus, M., & Lukumbuzya, S. (2019). Answer Set Programs Challenged by Ontologies. In M. Simkus & G. Weddell (Eds.), 32nd International Workshop on Description Logics. CEUR Workshop proceedings. http://hdl.handle.net/20.500.12708/55531 ( reposiTUm)
Ortiz de la Fuente, M. M. (2019). From Complete to Incomplete Data and Back in Ontology-Enriched Databases. In A. Hogan & T. Milo (Eds.), Aidan Hogan, Tova Milo: Proceedings of the 13th Alberto Mendelzon International Workshop on Foundations of Data Management, Asunción, Paraguay, June 3-7, 2019. CEUR Workshop proceedings. http://hdl.handle.net/20.500.12708/55530 ( reposiTUm)
Ortiz, M. (2019). Ontology-Mediated Queries from Examples: a Glimpse at the DL-Lite Case. In D. Calvanese & L. Iocchi (Eds.), EPiC Series in Computing. EPiC Series in Computing, Easychair. https://doi.org/10.29007/jhtz ( reposiTUm)
Ortiz, M. (2018). Improving Data Management using Domain Knowledge. In Proceedings of the Twenty-Seventh International Joint Conference on Artificial Intelligence. International Joint Conference on Artificial Intelligence (IJCAI), Edinburgh, Scotland, UK, Austria. https://doi.org/10.24963/ijcai.2018/814 ( reposiTUm)
Bajraktari, L., Ortiz de la Fuente, M. M., & Simkus, M. (2018). Combining Rules and Ontologies into Clopen Knowledge Bases. In Proceedings of the Thirty-Second AAAI Conference on Artificial Intelligence e (AAAI-18) (pp. 1728–1735). http://hdl.handle.net/20.500.12708/57703 ( reposiTUm)
Bajraktari, L., Ortiz, M., & Simkus, M. (2018). Compiling Model Representations for Querying Large ABoxes in Expressive DLs. In Proceedings of the Twenty-Seventh International Joint Conference on Artificial Intelligence. IJCAI - International Joint Conference on Artificial Intelligence, Stockholm, EU. https://doi.org/10.24963/ijcai.2018/234 ( reposiTUm)
Andresel, M.-P., Ibanez Garcia, Y. A., Ortiz de la Fuente, M. M., & Simkus, M. (2018). Taming Complex Role Inclusions for DL-Lite. In Proceedings of the 31st International Workshop on Description Logics co-located with 16th International Conference on Principles of Knowledge Representation and Reasoning (KR 2018), Tempe, Arizona, US, October 27th - to - 29th, 2018. (p. 12). CEUR-WS.org. http://hdl.handle.net/20.500.12708/57607 ( reposiTUm)
Andresel, M.-P., Ibanez Garcia, Y. A., Ortiz de la Fuente, M. M., & Simkus, M. (2018). Relaxing and Restraining Queries for OBDA - Extended Abstract. In Principles of Knowledge Representation and Reasoning: Proceedings of the Sixteenth International Conference, KR 2018, Tempe, Arizona, 30 October-2 November 2018. (pp. 617–618). http://hdl.handle.net/20.500.12708/57608 ( reposiTUm)
Ahmetaj, S., Ortiz de la Fuente, M. M., & Simkus, M. (2018). Rewriting Guarded Existential Rules into Small Datalog Programs. In B. Kimelfeld & Y. Amsterdamer (Eds.), 21st International Conference on Database Theory, {ICDT} 2018 (pp. 1–24). Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik. https://doi.org/10.4230/LIPIcs.ICDT.2018.4 ( reposiTUm)
Böhm, K., & Ortiz de la Fuente, M. M. (2018). A Tool for Building Topic-specific Ontologies Using a Knowledge Graph. In Proceedings of the 31st International Workshop on Description Logics co-located with 16th International Conference on Principles of Knowledge Representation and Reasoning (KR 2018), Tempe, Arizona, US, October 27th - to - 29th, 2018. (p. 12). CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/57716 ( reposiTUm)
Bajraktari, L., Ortiz de la Fuente, M. M., & Simkus, M. (2017). Clopen Knowledge Bases: Combining Description Logics and Answer Set Programming. In A. Artale, B. Glimm, & R. Kontchakov (Eds.), Proceedings of the 30th International Workshop on Description Logics (pp. 1–13). CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/55477 ( reposiTUm)
Labai, N., Homola, M., & Ortiz de la Fuente, M. M. (2017). Constructive Satisfiability Procedure for ALCP(Z) (Preliminary Report). In A. Artale, B. Glimm, & R. Kontchakov (Eds.), Proceedings of the 30th International Workshop on Description Logics (pp. 1–13). CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/55478 ( reposiTUm)
Hofer, M., Fermüller, C. G., & Ortiz, M. (2017). Querying with Vague Quantifiers Using Probabilistic Semantics. In Flexible Query Answering Systems - 12th International Conference, FQAS 2017, London, UK, June 21-22, 2017, Proceedings ; Christiansen, Henning; Jaudoin, Hélène; Chountas, Panagiotis; Andreasen, Troels; Larsen, Henrik Legind. Cham. https://doi.org/10.1007/978-3-319-59692-1_2 ( reposiTUm)
Ahmetaj, S., Ortiz de la Fuente, M. M., & Simkus, M. (2016). Polynomial Datalog Rewritings for Ontology Mediated Queries with Closed Predicates. In R. Pichler & A. S. da Silva (Eds.), Proceedings of the 10th Alberto Mendelzon International Workshop on Foundations of Data Management, Panama City, Panama, May 8-10, 2016 (p. 5). CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/56671 ( reposiTUm)
Ahmetaj, S., Ortiz de la Fuente, M. M., & Simkus, M. (2016). Polynomial Disjunctive Datalog Rewritings of Instance Queries in Expressive Description Logics. In M. Lenzerini & R. Penaloza (Eds.), Proceedings of the 29th International Workshop on Description Logics, Cape Town, South Africa, April 22-25, 2016. (p. 13). CEUR Workshop Proceedings / CEUR-WS.org. http://hdl.handle.net/20.500.12708/56673 ( reposiTUm)
Ngo, N., Ortiz de la Fuente, M. M., & Simkus, M. (2016). Closed Predicates in Description Logics: Results on Combined Complexity. In R. Pichler & A. S. da Silva (Eds.), Proceedings of the 10th Alberto Mendelzon International Workshop on Foundations of Data Management, Panama City, Panama, May 8-10, 2016 (p. 5). CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/56672 ( reposiTUm)
Ahmetaj, S., Ortiz de la Fuente, M. M., & Simkus, M. (2016). Polynomial Datalog Rewritings for Expressive Description Logics with Closed Predicates. In S. Kambhampati (Ed.), Proceedings of the Twenty-Fifth International Joint Conference on Artificial Intelligence, IJCAI 2016, New York, NY, USA, 9-15 July 2016 (pp. 878–885). IJCAI/AAAI Press. http://hdl.handle.net/20.500.12708/56675 ( reposiTUm)
Ngo, N., Ortiz de la Fuente, M. M., & Simkus, M. (2016). Closed Predicates in Description Logics: Results on Combined Complexity. In C. Baral, J. P. Delgrande, & F. Wolter (Eds.), Principles of Knowledge Representation and Reasoning: Proceedings of the Fifteenth International Conference, {KR} 2016, Cape Town, South Africa, April 25-29, 2016. (pp. 237–246). AAAI Press. http://hdl.handle.net/20.500.12708/56676 ( reposiTUm)
Andresel, M.-P., Ortiz de la Fuente, M. M., & Simkus, M. (2016). A Compilation Technique for Interactive Ontology-mediated Data Exploration. In M. Lenzerini & R. Penaloza (Eds.), Proceedings of the 29th International Workshop on Description Logics, Cape Town, South Africa, April 22-25, 2016. (p. 12). CEUR Workshop Proceedings / CEUR-WS.org. http://hdl.handle.net/20.500.12708/56678 ( reposiTUm)
Calvanese, D., Ortiz de la Fuente, M. M., & Simkus, M. (2016). Verification of Evolving Graph-structured Data under Expressive Path Constraints. In W. Martens & T. Zeume (Eds.), 19th International Conference on Database Theory, ICDT 2016, Bordeaux, France, March 15-18, 2016 (pp. 15:1-15:19). Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik. https://doi.org/10.4230/LIPIcs.ICDT.2016.15 ( reposiTUm)
Bienvenu, M., Ortiz de la Fuente, M. M., & Simkus, M. (2015). Navigational Queries Based on Frontier-Guarded Datalog: Preliminary Results. In Proceedings of the 9th Alberto Mendelzon International Workshop on Foundations of Data Management, Lima, Peru, May 6 - 8, 2015 (pp. 162–171). CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/55397 ( reposiTUm)
Ngo, N., Ortiz de la Fuente, M. M., & Simkus, M. (2015). The Combined Complexity of Reasoning with Closed Predicates in Description Logics. In D. Calvanese & B. Konev (Eds.), Proceedings of the 28th International Workshop on Description Logics, Athens,Greece, June 7-10, 2015 (pp. 249–261). CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/55398 ( reposiTUm)
Bienvenu, M., & Ortiz, M. (2015). Ontology-Mediated Query Answering with Data-Tractable Description Logics. In W. Faber & A. Paschke (Eds.), Reasoning Web. Web Logic Rules (pp. 218–307). Springer LNCS. https://doi.org/10.1007/978-3-319-21768-0_9 ( reposiTUm)
Bienvenu, M., Calvanese, D., Ortiz de la Fuente, M. M., & Simkus, M. (2014). Nested Regular Path Queries in Description Logics (Extended Abstract). In G. Gottlob & J. Perez (Eds.), Proceedings of the 8th Alberto Mendelzon Workshop on Foundations of Data Management. CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/55386 ( reposiTUm)
Bienvenu, M., Calvanese, D., Ortiz de la Fuente, M. M., & Simkus, M. (2014). Nested Regular Path Queries in Description Logics. In C. Baral, G. De Giacomo, & T. Eiter (Eds.), Principles of Knowledge Representation and Reasoning: Proceedings of the Fourteenth International Conference (KR 2014) (pp. 218–227). AAAI Press. http://hdl.handle.net/20.500.12708/55963 ( reposiTUm)
Ortiz, M., & Šimkus, M. (2014). Revisiting the Hardness of Query Answering in Expressive Description Logics. In R. Kontchakov & M.-L. Mugnier (Eds.), Web Reasoning and Rule Systems (pp. 216–223). Springer Lecture Notes in Computer Science. https://doi.org/10.1007/978-3-319-11113-1_18 ( reposiTUm)
Ahmetaj, S., Calvanese, D., Ortiz de la Fuente, M. M., & Simkus, M. (2014). Planning Problems for Graph Structured Data in Description Logics. In M. Bienvenu, M. M. Ortiz de la Fuente, R. Rosati, & M. Simkus (Eds.), Informal Proceedings of the 27th International Workshop on Description Logics (pp. 4–7). CEUR-WS. http://hdl.handle.net/20.500.12708/55993 ( reposiTUm)
Ahmetaj, S., Calvanese, D., Ortiz de la Fuente, M. M., & Simkus, M. (2014). Managing Change in Graph-Structured Data Using Description Logics. In C. E. Brodley & P. Stone (Eds.), Proceedings of the Twenty-Eighth AAAI Conference on Aritifical Intelligence (pp. 966–973). AAAI Press/IJCAI. http://hdl.handle.net/20.500.12708/55928 ( reposiTUm)
Ahmetaj, S., Calvanese, D., Ortiz de la Fuente, M. M., & Simkus, M. (2014). Planning and Change in Graph Structured Data under Description Logics Constraints. In G. Gottlob & J. Perez (Eds.), Proceedings of the 8th Alberto Mendelzon Workshop on Foundations of Data Management. CEUR-Proceedings. http://hdl.handle.net/20.500.12708/55930 ( reposiTUm)
Calvanese, D., Ortiz de la Fuente, M. M., & Simkus, M. (2013). Evolving Graph Databases under Description Logic Constraints. In T. Eiter, B. Glimm, Y. Kazakov, & M. Krötzsch (Eds.), Informal Proceedings of the 26th International Workshop on Description Logics (pp. 120–131). CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/55141 ( reposiTUm)
Bienvenu, M., Ortiz de la Fuente, M. M., Simkus, M., & Xiao, G. (2013). Tractability Guarantees for DL-Lite Query Answering. In T. Eiter, B. Glimm, Y. Kazakov, & M. Krötzsch (Eds.), Informal Proceedings of the 26th International Workshop on Description Logics (pp. 41–52). CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/55142 ( reposiTUm)
Ortiz de la Fuente, M. M. (2013). Ontology Based Query Answering: The Story So Far. In L. Bravo & M. Lenzerini (Eds.), Proceedings of the 7th Alberto Mendelzon International Workshop on Foundations of Data Management (pp. 1–14). CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/55143 ( reposiTUm)
Bienvenu, M., Ortiz de la Fuente, M. M., Simkus, M., & Xiao, G. (2013). Tractable Queries for Lightweight Description Logics. In F. Rossi (Ed.), IJCAI 2013, Proceedings of the 23rd International Joint Conference on Artificial Intelligence (pp. 768–774). AAAI Press. http://hdl.handle.net/20.500.12708/55042 ( reposiTUm)
Bienvenu, M., Ortiz de la Fuente, M. M., & Simkus, M. (2013). Conjunctive Regular Path Queries in Lightweight Description Logics. In F. Rossi (Ed.), IJCAI 2013, Proceedings of the 23rd International Joint Conference on Artificial Intelligence (pp. 761–767). AAAI Press. http://hdl.handle.net/20.500.12708/55043 ( reposiTUm)
Eiter, T., Ortiz de la Fuente, M. M., Simkus, M., Tran, T.-K., & Xiao, G. (2012). Towards Practical Query Answering for Horn SHIQ. In Y. Kazakov, D. Lembo, & F. Wolter (Eds.), Proc. of the 2012 International Workshop on Description Logics (DL 2012) (pp. 158–168). CEUR workshop proceedings. http://hdl.handle.net/20.500.12708/54289 ( reposiTUm)
Ortiz, M., & Šimkus, M. (2012). Reasoning and Query Answering in Description Logics. In T. Eiter & T. Krennwallner (Eds.), Lecture Notes in Computer Science (pp. 1–53). Springer LNCS. https://doi.org/10.1007/978-3-642-33158-9_1 ( reposiTUm)
Bienvenu, M., Ortiz de la Fuente, M. M., & Simkus, M. (2012). Answering Expressive Path Queries over Lightweight DL Knowledge Bases. In Y. Kazakov, D. Lembo, & F. Wolter (Eds.), Proc. of the 2012 International Workshop on Description Logics (DL 2012) (pp. 81–91). http://hdl.handle.net/20.500.12708/54354 ( reposiTUm)
Eiter, T., Ortiz de la Fuente, M. M., Simkus, M., Tran, T.-K., & Xiao, G. (2012). Query Rewriting for Horn-SHIQ Plus Rules. In J. Hoffmann & B. Selman (Eds.), Proceedings of the Twenty-Sixth AAAI Conference on Artificial Intelligence (pp. 726–733). AAAI Press. http://hdl.handle.net/20.500.12708/54357 ( reposiTUm)
Calvanese, D., Ortiz de la Fuente, M. M., Simkus, M., & Stefanoni, G. (2012). The Complexity of Explaining Negative Query Answers in DL-Lite. In G. Brewka, T. Eiter, & S. McIlraith (Eds.), Principles of Knowledge Representation and Reasoning: Proceedings of the Thirteenth International Conference, KR 2012 (pp. 583–587). AAAI Press. http://hdl.handle.net/20.500.12708/54355 ( reposiTUm)
Calvanese, D., Ortiz de la Fuente, M. M., & Simkus, M. (2011). Containment of Regular Path Queries under Description Logic Constraints. In T. Walsh (Ed.), Proceedings of the Twenty-Second International Joint Conference on Artificial Intelligence (pp. 805–812). AAAI Press/International Joint Conferences on Artificial Intelligence. https://doi.org/10.5591/978-1-57735-516-8/IJCAI11-141 ( reposiTUm)
Calvanese, D., Carbotta, D., & Ortiz de la Fuente, M. M. (2011). A Practical Automata-Based Technique for Reasoning in Expressive Description Logics. In T. Walsh (Ed.), Proceedings of the Twenty-Second International Joint Conference on Artificial Intelligence (pp. 798–804). AAAI Press/International Joint Conferences on Artificial Intelligence. https://doi.org/10.5591/978-1-57735-516-8/IJCAI11-140 ( reposiTUm)
Ortiz de la Fuente, M. M., Rudolph, S., & Simkus, M. (2011). Query Answering in the Horn Fragments of the Description Logics SHOIQ and SROIQ. In T. Walsh (Ed.), Proceedings of the Twenty-Second International Joint Conference on Artificial Intelligence (pp. 1039–1044). AAAI Press/International Joint Conferences on Artificial Intelligence. https://doi.org/10.5591/978-1-57735-516-8/IJCAI11-178 ( reposiTUm)
Calvanese, D., Ortiz de la Fuente, M. M., Simkus, M., & Stefanoni, G. (2011). The Complexity of Conjunctive Query Abduction in DL-Lite. In R. Rosati, S. Rudolph, & M. Zakharyaschev (Eds.), CEUR Workshop Proceedings (p. 11). CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/53694 ( reposiTUm)
Ortiz de la Fuente, M. M., Rudolph, S., & Simkus, M. (2010). Worst-Case Optimal Reasoning for the Horn-DL Fragments of OWL 1 and 2. In F. Lin, U. Sattler, & M. Truszczynski (Eds.), Twelfth International Conference on Principles of Knowledge Representation and Reasoning (KR2010) (pp. 269–279). AAAI Press, Menlo Park. http://hdl.handle.net/20.500.12708/53391 ( reposiTUm)
Bienvenu, M., Eiter, T., Lutz, C., Ortiz de la Fuente, M. M., & Simkus, M. (2010). Query Answering in the Description Logic S. In V. Haarslev, D. Toman, & G. Weddell (Eds.), Proceedings of the 23rd International Workshop on Description Logics (DL-2010) (pp. 149–160). CEUR workshop proceedings. http://hdl.handle.net/20.500.12708/53392 ( reposiTUm)
Eiter, T., Lutz, C., Ortiz de la Fuente, M. M., & Simkus, M. (2009). Query Answering in Description Logics with Transitive Roles. In C. Boutilier (Ed.), Proceedings of the Twenty-First International Joint Conference on Artificial Intelligence (IJCAI-09) (pp. 759–764). AAAI Press. http://hdl.handle.net/20.500.12708/52739 ( reposiTUm)
Calvanese, D., Eiter, T., & Ortiz de la Fuente, M. M. (2009). Regular Path Queries in Expressive Description Logics with Nominals. In C. Boutilier (Ed.), Proceedings of the Twenty-First International Joint Conference on Artificial Intelligence (IJCAI-09) (pp. 714–720). AAAI Press. http://hdl.handle.net/20.500.12708/52740 ( reposiTUm)
Eiter, T., Lutz, C., Ortiz, M., & Šimkus, M. (2009). Query Answering in Description Logics: The Knots Approach. In H. Ono, M. Kanazawa, & R. J. G. B. de Queiroz (Eds.), Logic, Language, Information and Computation (pp. 26–36). Springer Lecture Notes in Computer Science. https://doi.org/10.1007/978-3-642-02261-6_3 ( reposiTUm)
Ortiz de la Fuente, M. M. (2008). An Automata-based algorithm for description logics around SRIQ. In M. Osorio & I. Olmos (Eds.), Fourth Latin American Workshop on Non-Monotonic Reasoning (p. 15). CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/52484 ( reposiTUm)
Eiter, T., Gottlob, G., Ortiz, M., & Šimkus, M. (2008). Query Answering in the Description Logic Horn-SHIQ. In S. Hölldobler, C. Lutz, & H. Wansing (Eds.), Logics in Artificial Intelligence: 11th European Conference, JELIA 2008, Dresden, Germany, September 28-October 1, 2008. Proceedings (pp. 166–179). Lecture Notes in Artificial Intelligence. https://doi.org/10.1007/978-3-540-87803-2_15 ( reposiTUm)
Ortiz, M. (2008). Extending Carin to the Description Logics of the $\mathcal{SH}$ Family. In S. Hölldobler, C. Lutz, & H. Wansing (Eds.), Logics in Artificial Intelligence (pp. 324–337). Lecture Notes in Artificial Intelligence. https://doi.org/10.1007/978-3-540-87803-2_27 ( reposiTUm)
Ortiz de la Fuente, M. M., Simkus, M., & Eiter, T. (2008). Conjunctive Query Answering in SH using Knots. In F. Baader, C. Lutz, & B. Motik (Eds.), Proceedings of the 21st International Workshop on Description Logics (DL2008) (p. 11). CEUR Workshop proceedings. http://hdl.handle.net/20.500.12708/52270 ( reposiTUm)
Ortiz de la Fuente, M. M. (2008). Complexity of Query Answering over Expressive Knowledge Bases. In M. Montes y Gomez & M. Gonzalez Mendoza (Eds.), Proceedings of MICAI-2008, Doctoral Consortium (pp. 22–25). http://hdl.handle.net/20.500.12708/52432 ( reposiTUm)
Ortiz de la Fuente, M. M., Simkus, M., & Eiter, T. (2008). Worst-case Optimal Conjunctive Query Answering for an Expressive Description Logic without Inverses. In D. Fox & C. P. Gomes (Eds.), 23rd AAAI Conference on Artificial Intelligence (pp. 504–510). AAAI Press. http://hdl.handle.net/20.500.12708/52283 ( reposiTUm)
Eiter, T., Ortiz, M., & Šimkus, M. (2008). Reasoning Using Knots. In I. Cervesato, H. Veith, & A. Voronkov (Eds.), Logic for Programming, Artificial Intelligence, and Reasoning (pp. 377–390). Lecture Notes in Computer Science, Springer. https://doi.org/10.1007/978-3-540-89439-1_27 ( reposiTUm)
Calvanese, D., Eiter, T., & Ortiz de la Fuente, M. M. (2007). Answering Regular Path Queries in Expressive Description Logics: An Automata-Theoretic Approach. In Proceedings of the Twenty-Second AAAI Conference on Artificial Intelligence (pp. 391–396). AAAI Press. http://hdl.handle.net/20.500.12708/51871 ( reposiTUm)
Ortiz de la Fuente, M. M. (2006). A Fully Internalized Sequent Calculus for Hybrid Categorial Logics. In J. Huitink & S. Katrenko (Eds.), Proceedings of the Eleventh ESSLLI Student Session (pp. 136–147). http://hdl.handle.net/20.500.12708/51783 ( reposiTUm)
Ortiz de la Fuente, M. M., Calvanese, D., & Eiter, T. (2006). Data Complexity of Answering Unions of Conjunctive Queries in SHIQ. In B. Parsi, U. Sattler, & D. Toman (Eds.), Proceedings of the 2006 International Workshop on Description Logics (DL’06). Windermere, Lake District, UK, May 30-June 1, 2006 (pp. 62–73). CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/51655 ( reposiTUm)
Ortiz de la Fuente, M. M., Calvanese, D., & Eiter, T. (2006). Characterizing Data Complexity for Conjunctive Query Answering in Expressive Description Logics. In Proceedings 21th National Conference on Artificial Intelligence (AAAI ’06), July 16-23, 2006, Boston, USA ISBN 978-1-57735-281-5 (pp. 275–280). AAAI Press. http://hdl.handle.net/20.500.12708/51654 ( reposiTUm)

Tagungsbände

Proceedings of the 31st International Workshop on Description Logics co-located with 16th International Conference on Principles of Knowledge Representation and Reasoning (KR 2018), Tempe, Arizona, US, October 27-29, 2018. (2018). In M. M. Ortiz de la Fuente & T. Schneider (Eds.), CEUR Workshop Proceedings. CEUR-WS.org. http://hdl.handle.net/20.500.12708/24559 ( reposiTUm)
Web Reasoning and Rule Systems. (2016). In M. M. Ortiz de la Fuente & S. Schlobach (Eds.), Lecture Notes in Computer Science. Springer, LNCS. https://doi.org/10.1007/978-3-319-45276-0 ( reposiTUm)
Informal Proceedings of the 27th International Workshop on Description Logics. (2014). In M. Bienvenu, M. M. Ortiz de la Fuente, R. Rosati, & M. Simkus (Eds.), CEUR Workshop Proceedings. CEUR-Proceedings. http://hdl.handle.net/20.500.12708/23938 ( reposiTUm)

Präsentationen

Bienvenu, M., & Ortiz de la Fuente, M. M. (2016). Query Answering with Description Logic Ontologies. 28th European Summer School in Logic, Language and Information, Bolzano, Italy, EU. http://hdl.handle.net/20.500.12708/86464 ( reposiTUm)
Ortiz de la Fuente, M. M. (2016). Expressive Ontology and Query Languages for Data Access and Management. 12th Reasoning Web Summer School (RW 2016), Aberdeen, Scotland, EU. http://hdl.handle.net/20.500.12708/86463 ( reposiTUm)
Ortiz de la Fuente, M. M., & Simkus, M. (2016). Managing Change in Graph-Structured Data Using Description Logics. Workshop on New Trends in Belief Change, Vienna, Austria. http://hdl.handle.net/20.500.12708/86468 ( reposiTUm)
Ortiz de la Fuente, M. M. (2013). Reasoning and Query Answering in Description Logics. School of the Alberto Mendelzon International Workshop on Foundations of Data Management, Puebla, Mexico, Non-EU. http://hdl.handle.net/20.500.12708/85758 ( reposiTUm)
Ortiz de la Fuente, M. M. (2009). Querying Expressive Knowledge Bases. Seminar of the Artificial Intelligence Research Group, University Rey Juan Carlos (GIA - URJC), University Rey Juan Carlos. Madrid, Spain, EU. http://hdl.handle.net/20.500.12708/84976 ( reposiTUm)
Ortiz de la Fuente, M. M. (2009). Querying Description Logic Knowledge Bases: automata-theoretic techniques. Moscow-Vienna Workshop on Logic and Computation 2009, Wien, Austria. http://hdl.handle.net/20.500.12708/84975 ( reposiTUm)
Ortiz de la Fuente, M. M. (2009). Query Answering in Horn-SHIQ. Seminar of the KRDB Research Centre at the Faculty of Computer Science of the Free University of Bozen-Bolzano, Bolzano, Italy, EU. http://hdl.handle.net/20.500.12708/84972 ( reposiTUm)
Ortiz de la Fuente, M. M., Simkus, M., & Eiter, T. (2009). Reasoning with knots. Tutorial sessions, Faculty of Computer Sicience, BUAP, Puebla, Mexiko, Non-EU. http://hdl.handle.net/20.500.12708/84974 ( reposiTUm)
Ortiz de la Fuente, M. M. (2009). Query Answering over expressive DL Ontologies. Seminar of the Artificial Intelligence Department, Technical University of Madrid (DIA - UPM), Technical University of Madrid, Madrid, Spain, EU. http://hdl.handle.net/20.500.12708/84977 ( reposiTUm)
Ortiz de la Fuente, M. M. (2008). The combined complexity of query answering in expressive DLs. Seminar of the KRDB Research Centre at the Faculty of Computer Science of the Free University of Bozen-Bolzano, Bolzano, Italy, EU. http://hdl.handle.net/20.500.12708/84971 ( reposiTUm)

Berichte

Labai, N., Simkus, M., & Ortiz de la Fuente, M. M. (2020). An ExpTime Upper Bound for ALC with Integers (Extended Version) (2006.02078). http://hdl.handle.net/20.500.12708/40248 ( reposiTUm)
Gogacz, T., Gutierrez-Basulto, V., Ibanez Garcia, Y. A., Murlak, F., Ortiz de la Fuente, M. M., & Simkus, M. (2019). Ontology Focusing: Knowledge-enriched Databases on Demand (1904.00195). http://hdl.handle.net/20.500.12708/39865 ( reposiTUm)
Labai, N., Kotek, T., Ortiz de la Fuente, M. M., & Veith, H. (2019). Pebble-Intervals Automata and FO2 with Two Orders (Extended Version (1912.00171). http://hdl.handle.net/20.500.12708/39866 ( reposiTUm)
Feier, C., Eiter, T., Kifer, M., Mosca, A., Rezk, M., Rosati, R., Ortiz de la Fuente, M. M., Simkus, M., Tran, T.-K., & Xiao, G. (2011). D3.4 Converged and Optimized Combinations of Rules and Ontologies (D3.4). http://hdl.handle.net/20.500.12708/37097 ( reposiTUm)
Bienvenu, M., Eiter, T., Lutz, C., Ortiz de la Fuente, M. M., & Simkus, M. (2010). Query Answering in the Description Logic S (INFSYS RR 1843-10-01). http://hdl.handle.net/20.500.12708/36759 ( reposiTUm)
Ortiz de la Fuente, M. M., Rudolph, S., & Simkus, M. (2010). Query Answering is undecidable in DLs with regular expressions, inverses, nominals, and counting (INFSYS RR 1843-10-03). http://hdl.handle.net/20.500.12708/36760 ( reposiTUm)
Eiter, T., Ortiz de la Fuente, M. M., & Simkus, M. (2009). Conjunctive Query Answering in the Description Logic SH using Knots (INFSYS RR-1843-09-03). http://hdl.handle.net/20.500.12708/36176 ( reposiTUm)
Calvanese, D., Eiter, T., & Ortiz de la Fuente, M. M. (2009). Answering Regular Path Queries in Expressive Description Logics via Alternating Tree-Automata (INFSYS RR-1843-09-04). http://hdl.handle.net/20.500.12708/36175 ( reposiTUm)
Eiter, T., Lutz, C., Ortiz de la Fuente, M. M., & Simkus, M. (2009). Query answering in description logics with transitive roles (INFSYS RR-1843-09-02). http://hdl.handle.net/20.500.12708/36177 ( reposiTUm)
Calvanese, D., Eiter, T., & Ortiz de la Fuente, M. M. (2008). Answering regular path queries in expressive description logics: An automata-theoretic approach (Preliminary Version) (INFSYS RR-1843-08-05). http://hdl.handle.net/20.500.12708/35357 ( reposiTUm)
Eiter, T., Lutz, C., Ortiz de la Fuente, M. M., & Simkus, M. (2008). Complexity of Conjunctive Query Answering in Description Logics with Transitive Roles (INFSYS RR-1843-08-09). http://hdl.handle.net/20.500.12708/35361 ( reposiTUm)
Ortiz de la Fuente, M. M., Calvanese, D., & Eiter, T. (2007). Data Complexoty of Query Answering In Expressive Description Logics via Tableaux (INFSYS RR 1843-07-07). http://hdl.handle.net/20.500.12708/33097 ( reposiTUm)
Ortiz de la Fuente, M. M., Calvanese, D., & Eiter, T. (2006). Data Complexity of Query Answering in Expressive Description Logics with Nominals (INFSYS RR-1843-06-03). http://hdl.handle.net/20.500.12708/33074 ( reposiTUm)
Ortiz de la Fuente, M. M., Calvanese, D., Eiter, T., & Franconi, E. (2005). Data Complexity of Answering Conjunctive Queries over SHIQ Knowledge Bases. http://hdl.handle.net/20.500.12708/33043 ( reposiTUm)

Hochschulschriften

Ortiz, M. (2006). Answering conjunctive queries in expressive description logics [Diploma Thesis, Technische Universität Wien]. reposiTUm. http://hdl.handle.net/20.500.12708/185108 ( reposiTUm)