Results 31 to 40 of about 24,784 (209)

Flexible Querying for SPARQL [PDF]

, 2014
Flexible querying techniques can be used to enhance users' access to heterogeneous data sets, such as Linked Open Data. This paper extends SPARQL 1.1 with approximation and relaxation operators that can be applied to regular expressions for querying property paths in order to find more answers than would be returned by the exact form of a user query ...
Calì, Andrea, Frosini, R., Poulovassilis, Alexandra, Wood, Peter T.   +3 more
openaire   +1 more source

SGPT: A Generative Approach for SPARQL Query Generation From Natural Language Questions

IEEE Access, 2022
SPARQL query generation from natural language questions is complex because it requires an understanding of both the question and underlying knowledge graph (KG) patterns.
Md Rashad Al Hasan Rony, Uttam Kumar, Roman Teucher, Liubov Kovriguina, Jens Lehmann   +4 more
doaj   +1 more source

Semantics and Complexity of SPARQL [PDF]

ACM Transactions on Database Systems, 2006
SPARQL is the standard language for querying RDF data. In this article, we address systematically the formal study of the database aspects of SPARQL, concentrating in its graph pattern matching facility. We provide a compositional semantics for the core part of SPARQL, and study the complexity of the evaluation of several fragments of the language ...
Perez, Jorge, Arenas, Marcelo, Gutierrez, Claudio   +2 more
openaire   +8 more sources

Four Lessons in Versatility or How Query Languages Adapt to the Web [PDF]

, 2009
Exposing not only human-centered information, but machine-processable data on the Web is one of the commonalities of recent Web trends. It has enabled a new kind of applications and businesses where the data is used in ways not foreseen by the data ...
A. Bonifati, A. Gelder van, A. Polleres, A. Polleres, A.C. Klug, B. Adida, B. Cooper, B. Jenner, D. Olteanu, D. Olteanu, D. Recordon, D.D. Chamberlin, D.R. Fulkerson, E. Augurusa, F. Bry, F. Bry, F. Bry, F. Wei, F. Weigel, G. Gottlob, G. Karvounarakis, H. Björklund, H. Garcia-Molina, H. Meuss, H. Meuss, H. Przymusinska, H. Tamaki, H. Wang, H.V. Jagadish, J. Bailey, J. Euzenat, J. Pérez, J. Pérez, J. Pérez, J.D. Ullman, J.J. Carroll, J.V.D. Bussche, K. Kochut, K.A. Ross, K.R. Apt, K.S. Booth, L. Cabibbo, M. Habib, M. Kay, M. Marx, M. Marx, N. Bruno, N. Walsh, P. Boncz, P. Buneman, P. Cholak, P. O’Neil, P.G. Kolaitis, P.P. Schneider, R. Agrawal, R. Fagin, R. Goldman, R. Hull, R. Khare, R. Khare, R. Schenkel, S. Abiteboul, S. Abiteboul, S. Abiteboul, S. Al-Khalifa, S. Berger, S. Groppe, S. Trißl, T. Chen, T. Furche, T. Grust, T. Schwentick, T.C. Przymusinski, U. Assmann, W. Akhtar, W. Chen, W.L. Hsu, W.L. Hsu, Z. Chen   +78 more
core   +2 more sources

Rancang Bangun Plugin Protégé Menggunakan Ekspresi SPARQL-DL Dengan Masukan Bahasa Alami

IJCCS (Indonesian Journal of Computing and Cybernetics Systems), 2017
Semantic web is a technology that allows us to build a knowledge base or ontology for the information of the web page can be understood by computers. One software for building ontology-based semantic web is a protégé. Protege allows developers to develop
Muhammad Fahrurrozi, Azhari SN
doaj   +1 more source

Fostering Innovation: Streamlining Magnetocaloric Materials Research by Digitalization

Advanced Engineering Materials, EarlyView.
Magnetocaloric cooling (MCE) is an environmentally friendly refrigeration method with great potential. Optimizing MCE materials involves the preparation and screening of large quantities of samples, which in turn generates a large amount of data. A digitalization approach is presented that uses ontologies, knowledge graphs, and digital workflows to ...
Simon Bekemeier, Moritz Blum, Luana Caron, Alisa Chirkova, Philipp Cimiano, Basil Ell, Inga Ennen, Michael Feige, Maik Gaerner, Thomas Hilbig, Andreas Hütten, Günter Reiss, Tapas Samanta, Sonja Schöning, Christian Schröder, Lennart Schwan, Chris Taake, Martin Wortmann   +17 more
wiley   +1 more source

Proposta de uma ferramenta para classificação arquivística com base em ontologias

Em Questão, 2020
Buscou-se construir e demonstrar uma ferramenta desenvolvida a fim de reduzir o aspecto subjetivo inerente à classificação arquivística, tornando-a mais consistente.
Daniel Libonati Gomes, Thiago Henrique Bragato Barros, Renato Tarciso Barbosa de Sousa, Roberto Lopes dos Santos Junior   +3 more
doaj   +1 more source

ADDING 3D GIS VISUALIZATION AND NAVIGATION TO THE SPARQL QUERY LOOP [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
3D environments allow advanced spatial navigation and visualization, but have traditionally provided limited support for performing non-spatial data analysis operations like filtering, joining, and integrating data on-the-fly.
W. Beek, W. Beek, W. Beek, E. Folmer, E. Folmer, L. Rietveld, L. Rietveld, T. Baving, V. van Altena, V. van Altena, V. van Altena   +10 more
doaj   +1 more source

Medieval Manuscripts and Their Migrations: Using SPARQL to Investigate the Research Potential of an Aggregated Knowledge Graph

Digital Medievalist, 2022
Although the RDF query language SPARQL has a reputation for being opaque and difficult for traditional humanists to learn, it holds great potential for opening up vast amounts of Linked Open Data to researchers willing to take on its challenges.
Doug Emery, Eero Hyvönen, Emma Thomson, Hanno Wijsman, Laura Cleaver, Lynn Ransom, Mikko Koho, Toby Burrows   +7 more
doaj   +2 more sources

SPARQL Query Containment Under Schema [PDF]

Journal on Data Semantics, 2018
Query containment is defined as the problem of determining if the result of a query is included in the result of another query for any dataset. It has major applications in query optimization and knowledge base verification. The main objective of this work is to provide sound and complete procedures to determine containment of SPARQL queries under ...
Chekol, Melisachew, Euzenat, Jérôme, Genevès, Pierre, Layaïda, Nabil   +3 more
openaire   +4 more sources