TU Wien Informatics

Shqiponja Ahmetaj

Projektass.(FWF) Dr.techn. / MSc M.Sc.A.

Research Focus

Research Areas

  • Semantic Web / Ontologies, Description Logics, SPARQL, Semantci Web
Shqiponja Ahmetaj

Role

  • Polynomial rewritings from expressive Description Logics with closed predicates to variants of Datalog / S. Ahmetaj, M. Ortiz de la Fuente, M. Simkus / Artificial Intelligence, 280 (2020), 103220; 1 - 27
  • Rewriting Approaches for Ontology-Mediated Query Answering / PhD Thesis by S. Ahmetaj / Supervisor, Reviewer: R. Pichler, M. Simkus; Institut für Logic and Computation, 2019; oral examination: 2019-07-09
  • Rewriting Guarded Existential Rules into Small Datalog Programs / S. Ahmetaj, M. Ortiz de la Fuente, M. Simkus / Talk: Edbt / Icdt 2018, Wien; 2018-03-26 - 2018-03-30; in: "21st International Conference on Database Theory, {ICDT} 2018", Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik, 98 (2018), ISBN: 978-3-89318-078-3; 1 - 24
  • Managing Change in Graph-Structured Data Using Description Logics / S. Ahmetaj, M. Ortiz de la Fuente, D. Calvanese, M. Simkus / ACM Transactions on Computational Logic, 18 (2017), 4; 1 - 35
  • The Challenge of Optional Matching in SPARQL / S. Ahmetaj, W. Fischl, M. Kröll, R. Pichler, M. Simkus, S. Skritek / Keynote Lecture: Foundations of Information and Knowledge Systems - 9th International Symposium - FoIKS 2016, Linz (invited); 2016-03-07 - 2016-03-11; in: "Foundations of Information and Knowledge Systems - 9th International Symposium, FoIKS 2016, Linz, Austria, March 7-11, 2016. Proceedings", M. Gyssens, G. Simari (ed.); Lecture Notes in Computer Science (LNCS) / Springer, 9616 (2016), ISBN: 978-3-319-30023-8; 169 - 190
  • Polynomial Disjunctive Datalog Rewritings of Instance Queries in Expressive Description Logics / S. Ahmetaj, M. Ortiz de la Fuente, M. Simkus / Talk: 29th International Workshop on Description Logics (DL 2016), Cape Town, South Africa; 2016-04-22 - 2016-04-25; in: "Proceedings of the 29th International Workshop on Description Logics, Cape Town, South Africa, April 22-25, 2016.", M. Lenzerini, R. Penaloza (ed.); CEUR Workshop Proceedings / CEUR-WS.org, 1577 (2016), Paper ID 26, 13 pages
  • Polynomial Datalog Rewritings for Ontology Mediated Queries with Closed Predicates / S. Ahmetaj, M. Ortiz de la Fuente, M. Simkus / Talk: 10th Alberto Mendelzon International Workshop on Foundations of Data Management, Panama City, Panama; 2016-05-08 - 2016-05-10; in: "Proceedings of the 10th Alberto Mendelzon International Workshop on Foundations of Data Management, Panama City, Panama, May 8-10, 2016", R. Pichler, A. da Silva (ed.); CEUR Workshop Proceedings, 1644 (2016), Paper ID 19, 5 pages
  • Polynomial Datalog Rewritings for Expressive Description Logics with Closed Predicates / S. Ahmetaj, M. Ortiz de la Fuente, M. Simkus / Talk: Twenty-Fifth International Joint Conference on Artificial Intelligence - IJCAI 2016, New York, NY, USA; 2016-07-09 - 2016-07-15; in: "Proceedings of the Twenty-Fifth International Joint Conference on Artificial Intelligence, IJCAI 2016, New York, NY, USA, 9-15 July 2016", S. Kambhampati (ed.); IJCAI/AAAI Press, (2016), ISBN: 978-1-57735-770-4; 878 - 885
  • Towards Reconciling SPARQL and Certain Answers / S. Ahmetaj, W. Fischl / Talk: PhDs in Logic VII, Wien; 2015-05-14 - 2015-05-16
  • DL-Lite and Conjunctive Queries Extended by Optional Matching / S. Ahmetaj, W. Fischl, R. Pichler, M. Simkus, S. Skritek / Talk: 28th International Workshop on Description Logics, Athens,Greece; 2015-06-07 - 2015-06-10; in: "Proceedings of the 28th International Workshop on Description Logics, Athens,Greece, June 7-10, 2015", D. Calvanese, B. Konev (ed.); CEUR Workshop Proceedings, 1350 (2015), Paper ID 4, 4 pages
  • Towards Reconciling SPARQL and Certain Answers (Extended Abstract) / S. Ahmetaj, W. Fischl, R. Pichler, M. Simkus, S. Skritek / Talk: 9th Alberto Mendelzon International Workshop on Foundations of Data Management (AMW 2015), Lima, Peru; 2015-05-06 - 2015-05-08; in: "Proceedings of the 9th Alberto Mendelzon International Workshop on Foundations of Data Management, Lima, Peru, May 6 - 8, 2015", A. Cali, M. Vidal (ed.); CEUR Workshop Proceedings, 1378 (2015), Paper ID 4, 6 pages
  • Towards Reconciling SPARQL and Certain Answers / S. Ahmetaj, W. Fischl, R. Pichler, M. Simkus, S. Skritek / Talk: 24th International Conference on World Wide Web, WWW 2015, Florence; 2015-05-18 - 2015-05-22; in: "Proceedings of the 24th International Conference on World Wide Web, WWW 2015, Florence, Italy, May 18-22, 2015", A. Gangemi, L. Stefano, A. Panconesi (ed.); ACM, (2015), ISBN: 978-1-4503-3469-3; 23 - 33
  • Planning Problems for Graph Structured Data in Description Logics / S. Ahmetaj, D. Calvanese, M. Ortiz de la Fuente, M. Simkus / Talk: 27th International Workshop on Description Logics, Vienna, Austria; 2014-07-17 - 2014-07-20; in: "Informal Proceedings of the 27th International Workshop on Description Logics", M. Bienvenu, M. Ortiz de la Fuente, R. Rosati, M. Simkus (ed.); CEUR-WS, Vol-1193 (2014), ISSN: 1613-0073; 4 - 7
  • Managing Change in Graph-Structured Data Using Description Logics / S. Ahmetaj, D. Calvanese, M. Ortiz de la Fuente, M. Simkus / Talk: Twenty-Eighth AAAI Conference on Aritifical Intelligence (AAAI 2014), Québec City, Québec, Canada; 2014-07-27 - 2014-07-31; in: "Proceedings of the Twenty-Eighth AAAI Conference on Aritifical Intelligence", C. Brodley, P. Stone (ed.); AAAI Press/IJCAI, (2014), ISBN: 978-1-57735-661-5; 966 - 973
  • Planning and Change in Graph Structured Data under Description Logics Constraints / S. Ahmetaj, D. Calvanese, M. Ortiz de la Fuente, M. Simkus / Talk: AMW - Alberto Mendelzon International Workshop on Foundations of Data Management, Cartagena de Indias, Colombia; 2014-06-04 - 2014-06-06; in: "Proceedings of the 8th Alberto Mendelzon Workshop on Foundations of Data Management", G. Gottlob, J. Perez (ed.); CEUR-Proceedings, 1189 (2014), ISSN: 1613-0073