Results 1 to 10 of about 24,802 (228)
Processing SPARQL queries with regular expressions in RDF databases [PDF]
BMC Bioinformatics, 2011 Background As the Resource Description Framework (RDF) data model is widely used for modeling and sharing a lot of online bioinformatics resources such as Uniprot (dev.isb-sib.ch/projects/uniprot-rdf) or Bio2RDF (bio2rdf.org), SPARQL - a W3C ...
Cho Hune +6 more
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pSPARQL: A Querying Language for Probabilistic RDF Data [PDF]
Complexity, 2019 More and more linked data (taken as knowledge) can be automatically generated from nonstructured data such as text and image via learning, which are often uncertain in practice. On the other hand, most of the existing approaches to processing linked data are mainly designed for certain data.
Hong Fang
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Natural language aggregate query over RDF data [PDF]
Information Sciences, 2018 Natural language question-answering over RDF data has received widespread attention. Although there have been several studies that have dealt with a small number of aggregate queries, they have many restrictions (i.e., interactive information, controlled question or query template).
Xin Hu +3 more
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Three Implementations of SquishQL, a Simple RDF Query Language [PDF]
, 2002 RDF provides a basic way to represent data for the Semantic Web. We have been experimenting with the query paradigm for working with RDF data in semantic web applications. Query of RDF data provides a declarative access mechanism that is suitable for application usage and remote access.
Libby Miller +2 more
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An RDF Query Language based on Logic Programming
Electronic Notes in Theoretical Computer Science, 2008 AbstractIn this paper we investigate an extension of XQuery for querying (and inferring) from RDF documents. Following a graph based approach for specifying queries against RDF, XQuery is extended with construction of answers and boolean predicates for RDF entailment relationship inference. We will also study how to implement it in logic programming by
Jesús M. Almendros-Jiménez
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A Survey on Models and Query Languages for Temporally Annotated RDF [PDF]
International Journal of Advanced Computer Science and Applications, 2012 In this paper, we provide a survey on the models and query languages for temporally annotated RDF. In most of the works, a temporally annotated RDF ontology is essentially a set of RDF triples associated with temporal constraints, where, in the simplest case, a temporal constraint is a validity temporal interval.
Anastasia Analyti, Ioannis Pachoulakis
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FedQPL: A Language for Logical Query Plans over Heterogeneous Federations of RDF Data Sources (Extended Version) [PDF]
, 2020 This manuscript is an extended version of a paper in the 22nd International Conference on Information Integration and Web-based Applications & Services (iiWAS2020). The difference to the conference version is that this extended version includes an appendix with the full proofs of the results in the ...
Sijin Cheng, Olaf Hartig
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A Query Model to Capture Event Pattern Matching in RDF Stream Processing Query Languages [PDF]
, 2016 The current state of the art in RDF Stream Processing RSP proposes several models and implementations to combine Semantic Web technologies with Data Stream Management System DSMS operators like windows. Meanwhile, only a few solutions combine Semantic Web and Complex Event Processing CEP, which includes relevant features, such as identifying sequences ...
Daniele Dell’Aglio +4 more
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Towards a Unified Language for RDF Stream Query Processing
, 2015 In recent years, several RDF Stream Processing RSP systems have emerged, which allow querying RDF streams using extensions of SPARQL that include operators to take into account the velocity of this data. These systems are heterogeneous in terms of syntax, capabilities and evaluation semantics.
Daniele Dell’Aglio +3 more
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SQUALL: a Controlled Natural Language for Querying and Updating RDF Graphs [PDF]
, 2012 Formal languages play a central role in the Semantic Web. An important aspect regarding their design is syntax as it plays a crucial role in the wide acceptance of the Semantic Web approach. The main advantage of controlled natural languages (CNL) is to reconcile the high-level and natural syntax of natural languages, and the precision and lack of ...
Sébastien Ferré
+6 more sources