no code implementations • 7 May 2018 • Nikos Voskarides, Edgar Meij, Ridho Reinanda, Abhinav Khaitan, Miles Osborne, Giorgio Stefanoni, Prabhanjan Kambadur, Maarten de Rijke
KG fact contextualization is the task of augmenting a given KG fact with additional and useful KG facts.
no code implementations • 10 Nov 2014 • Giorgio Stefanoni, Boris Motik
Moreover, we show that, even for a restricted class of so-called arborescent acyclic queries, CQ answering over $\mathcal{EL}$ KBs becomes NP-hard in the presence of either transitive or reflexive roles.
no code implementations • 4 Feb 2014 • Diego Calvanese, Magdalena Ortiz, Mantas Simkus, Giorgio Stefanoni
In order to meet usability requirements, most logic-based applications provide explanation facilities for reasoning services.
no code implementations • 29 Mar 2013 • Giorgio Stefanoni, Boris Motik, Ian Horrocks
So-called combined approaches answer a conjunctive query over a description logic ontology in three steps: first, they materialise certain consequences of the ontology and the data; second, they evaluate the query over the data; and third, they filter the result of the second phase to eliminate unsound answers.
no code implementations • 16 Mar 2020 • Antonia Saravanou, Giorgio Stefanoni, Edgar Meij
The volume of news content has increased significantly in recent years and systems to process and deliver this information in an automated fashion at scale are becoming increasingly prevalent.