000149019 001__ 149019 000149019 005__ 20250124153131.0 000149019 0247_ $$2doi$$a10.1108/EL-02-2023-0052 000149019 0248_ $$2sideral$$a136315 000149019 037__ $$aART-2023-136315 000149019 041__ $$aeng 000149019 100__ $$aYagüe, José Félix 000149019 245__ $$aFUKG: answering flexible queries over knowledge graphs 000149019 260__ $$c2023 000149019 5060_ $$aAccess copy available to the general public$$fUnrestricted 000149019 5203_ $$aPurpose: There is an increasing interest in the use of knowledge graphs to represent real-world knowledge and a common need to manage imprecise knowledge in many real-world applications. This paper aims to study approaches to solve flexible queries over knowledge graphs. Design/methodology/approach: By introducing fuzzy logic in the query answering process, the authors are able to obtain a novel algorithm to solve flexible queries over knowledge graphs. This approach is implemented in the FUzzy Knowledge Graphs system, a software tool with an intuitive user-graphical interface. Findings: This approach makes it possible to reuse semantic web standards (RDF, SPARQL and OWL 2) and builds a fuzzy layer on top of them. The application to a use case shows that the system can aggregate information in different ways by selecting different fusion operators and adapting to different user needs. Originality/value: This approach is more general than similar previous works in the literature and provides a specific way to represent the flexible restrictions (using fuzzy OWL 2 datatypes). 000149019 536__ $$9info:eu-repo/grantAgreement/ES/AEI/PID2020-113903RB-I00 000149019 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc$$uhttp://creativecommons.org/licenses/by-nc/3.0/es/ 000149019 590__ $$a1.5$$b2023 000149019 591__ $$aINFORMATION SCIENCE & LIBRARY SCIENCE$$b70 / 161 = 0.435$$c2023$$dQ2$$eT2 000149019 592__ $$a0.447$$b2023 000149019 593__ $$aLibrary and Information Sciences$$c2023$$dQ2 000149019 593__ $$aComputer Science Applications$$c2023$$dQ3 000149019 594__ $$a4.2$$b2023 000149019 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion 000149019 700__ $$0(orcid)0000-0002-7581-0345$$aHuitzil, Ignacio$$uUniversidad de Zaragoza 000149019 700__ $$0(orcid)0000-0003-4239-8785$$aBobed, Carlos$$uUniversidad de Zaragoza 000149019 700__ $$0(orcid)0000-0001-5136-4152$$aBobillo, Fernando$$uUniversidad de Zaragoza 000149019 7102_ $$15007$$2570$$aUniversidad de Zaragoza$$bDpto. Informát.Ingenie.Sistms.$$cÁrea Lenguajes y Sistemas Inf. 000149019 773__ $$g42, 3 (2023), 368-392$$pElectron. libr.$$tElectronic library$$x0264-0473 000149019 8564_ $$s932280$$uhttps://zaguan.unizar.es/record/149019/files/texto_completo.pdf$$yPostprint 000149019 8564_ $$s1676297$$uhttps://zaguan.unizar.es/record/149019/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint 000149019 909CO $$ooai:zaguan.unizar.es:149019$$particulos$$pdriver 000149019 951__ $$a2025-01-24-14:49:07 000149019 980__ $$aARTICLE