Fuzzy Quantification over OWL Ontologies and Knowledge Graphs
Authors: Enrique Palacín, Fernando Bobillo, Ignacio Huitzil, Francesca A. Lisi, Umberto Straccia
Organizations: University of Zaragoza, Zaragoza, Spain · Aragon Institute of Engineering Research (I3A), Zaragoza, Spain · University of Bari Aldo Moro, Bari, Italy · CNR-ISTI, Pisa, Italy
This paper presents a versatile framework for evaluating fuzzy quantification queries over both standard and fuzzy ontologies as well as knowledge graphs. The primary objective is the retrieval of individuals that satisfy queries articulated via Type I or Type II fuzzy quantified expressions. A key advantage of the proposed approach is its inherent adaptability: it remains entirely agnostic to the quantifier type, the underlying evaluation method, and the specific data source of the ontology (i.e., OWL ontologies or RDFS knowledge graphs). Furthermore, we present Q2S2, a publicly accessible implementation of this system developed to support future research.