Research

Publications

• Roberto Maria Delfino, Maurizio Lenzerini, and Antonella Poggi. RDFS Knowledge Graphs Through the Lens of Logic: Semantics and Query Answering. In Proceedings of the 28th European Conference on Artificial Intelligence (ECAI 2025), volume 413 of Frontiers in Artificial Intelligence and Applications, pages 1511–1518. IOS Press, 2025. doi: 10.3233/FAIA250974.

• Gianluca Cima, Marco Console, Roberto Maria Delfino, Maurizio Lenzerini, and Antonella Poggi. Answering Conjunctive Queries with Safe Negation and Inequalities over RDFS Knowledge Bases. Proceedings of the AAAI Conference on Artificial Intelligence, 39(14):14824–14831, Apr. 2025. doi: 10.1609/aaai.v39i14.33625. URL https://ojs.aaai.org/index.php/AAAI/article/view/33625.

• Diego Calvanese, Gianluca Cima, Julien Corman, Roberto Maria Delfino,Maurizio Lenzerini, Lorenzo Marconi, Antonella Poggi, and Ognjen Savkovic. Answering MetaQueries over RDFS Ontologies under the SPARQL Metamodeling Semantics Entailment Regime. In Proc. of the 14th Int. Joint Conf. on Knowledge Graphs (IJCKG), Lecture Notes in Computer Science. Springer, 2025.

• Roberto Maria Delfino, Maurizio Lenzerini, and Antonella Poggi. Logic- Based Semantics and Query Entailment for RDFS Knowledge Graphs. In Proceedingsof the 38th International Workshop on Description Logics (DL 2025), volume 4091 of CEUR Workshop Proceedings, 2025. URL https://ceur-ws.org/ Vol-4091/paper29.pdf. Extended Abstract.

• Gianluca Cima, Marco Console, Roberto Maria Delfino, Maurizio Lenzerini, and Antonella Poggi. Answering Expressive Conjunctive Queries over RDFS Knowledge Bases. In Proceedings of the 38th International Workshop on Description Logics (DL 2025), volume 4091 of CEUR Workshop Proceedings, 2025. URL https://ceur-ws.org/Vol-4091/paper42.pdf. Extended Abstract.

• Roberto Maria Delfino, Maurizio Lenzerini, and Antonella Poggi. On the Need of a Formal Meta-modeling Semantics for Knowledge Graphs (short paper). In Proceedings of the AIxIA Discussion Papers 2024 co-located with the 23rd International Conference of the Italian Association for Artificial Intelligence (AIxIA 2024), Bolzano, Italy, November 25-28, 2024, volume 3915 of CEUR Workshop Proceedings. CEUR-WS.org, 2024. URL https://ceur-ws.org/Vol-3915/Paper-10.pdf.

• Donato Malerba, Antonella Poggi, Mario Alviano, Tommaso Boccali, Maria Teresa Camerlingo, Roberto Maria Delfino, Domenico Diacono, Domenico Elia, Vincenzo Pasquadibisceglie, Mara Sangiovanni, Vincenzo Spinoso, and Gioacchino Vino. Data-Centric AI Manifesto: How Data Quality Drives Modern AI. arXiv preprint arXiv:XXXX.XXXXX [cs.AI], 2026. [URL TBD]

Accepted (to be published)

• Roberto Maria Delfino. Query Entailment on RDFS Knowledge Graphs via Disjunctive Datalog. In Proceedings of the 41st ACM/SIGAPP Symposium On Applied Computing (SAC 2026), Thessaloniki, Greece March 23-27, 2026.

• Roberto Maria Delfino. Towards the Definition of a Unified Metamodeling Semantics for Knowledge Graphs. In Proceedings of the 33rd Symposium On Advanced Database Systems (SEBD 2025), Ischia (Italy), 16-19 Jun 2025.

• Daniele Bertillo, Luca Cabibbo, Gianluca Cima, Valter Crescenzi, Marco Console, Roberto Maria Delfino, Stefano Iannucci, Domenico Lembo, Maurizio Lenzerini, Lorenzo Marconi, Paolo Merialdo, Marco Napoleone, Laura Papi, Antonella Poggi, Federico Maria Scafoglieri and Riccardo Torlone. Data Augmentation for Data-Centric AI Through the Lens of Semantic Technologies: A Position Paper. In Proceedings of the 33rd Symposium On Advanced Database Systems (SEBD 2025), Ischia (Italy), 16-19 Jun 2025.

• Gianluca Cima, Marco Console, Roberto Maria Delfino, Maurizio Lenzerini, and Antonella Poggi. Answering Queries with Negation and Inequalities over RDFS Knowledge Bases (Extended Abstract). In Proceedings of the 1st International Research and Industry Symposium on Artificial Intelligence (IRIS-AI 2025). Montefiascone (Italy), 01-04 Aug 2025.

• Roberto Maria Delfino, Maurizio Lenzerini, and Antonella Poggi. Logical Foundations for Query Entailment over RDFS Knowledge Graphs (Extended Abstract). In Proceedings of the 1st International Research and Industry Symposium on Artificial Intelligence (IRIS-AI 2025). Montefiascone (Italy), 01-04 Aug 2025.

Research activities

• Program Chair at the 1st International Research and Industry Symposium on Artificial Intelligence (IRIS-AI 2025), Montefiascone (Italy), 01-04 Aug 2025.