Results 21 to 30 of about 24,112 (217)
A Hybrid Approach Combining R*-Tree and k-d Trees to Improve Linked Open Data Query Performance
Applied Sciences, 2021 Semantic Web has recently gained traction with the use of Linked Open Data (LOD) on the Web. Although numerous state-of-the-art methodologies, standards, and technologies are applicable to the LOD cloud, many issues persist.
Yuxiang Sun +3 more
doaj +1 more source
Taming Existence in RDF Querying [PDF]
, 2008 We introduce the recursive, rule-based RDF query language RDFLog. RDFLog extends previous RDF query languages by arbitrary quantifier alternation: blank nodes may occur in the scope of all, some, or none of the universal variables of a rule.
Bry, François +5 more
core +2 more sources
An Approach of Automatic SPARQL Generation for BIM Data Extraction
Applied Sciences, 2020 Generally, building information modelling (BIM) models contain multiple dimensions of building information, including building design data, construction information, and maintenance-related contents, which are related with different engineering ...
Dongming Guo +2 more
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Survey over Existing Query and Transformation Languages [PDF]
, 2004 A widely acknowledged obstacle for realizing the vision of the Semantic Web is the inability of many current Semantic Web approaches to cope with data available in such diverging representation formalisms as XML, RDF, or Topic Maps.
Bolzer, Oliver +6 more
core +2 more sources
Temporal Data Representation and Querying Based on RDF
IEEE Access, 2019 With the explosive growth of temporal data, how to query and manage temporal data has become an important research issue. Resource description framework (RDF), as the standard data and knowledge description language of the semantic web, has been widely ...
Fu Zhang +3 more
doaj +1 more source
F1000Research, 2020 The increasing use of Semantic Web technologies in the life sciences, in particular the use of the Resource Description Framework (RDF) and the RDF query language SPARQL, opens the path for novel integrative analyses, combining information from multiple ...
Ana Claudia Sima +4 more
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BioSWR--semantic web services registry for bioinformatics. [PDF]
PLoS ONE, 2014 Despite of the variety of available Web services registries specially aimed at Life Sciences, their scope is usually restricted to a limited set of well-defined types of services.
Dmitry Repchevsky, Josep Ll Gelpi
doaj +1 more source
, 2003 RDF is the first W3C standard for enriching information resources of the Web with detailed meta data. The semantics of RDF data is defined using a RDF schema. The most expressive language for querying RDF is RQL, which enables querying of semantics.
Bönström, Valerie +2 more
core +2 more sources
A Perfect Match for Reasoning, Explanation, and Reason Maintenance [PDF]
, 2009 Path query languages have been previously shown to com- plement RDF rule languages in a natural way and have been used as a means to implement the RDFS derivation rules.
Bry, François +2 more
core +1 more source
ANSWERING GEOSPARQL QUERIES OVER RELATIONAL DATA [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2017 In this paper we present the system Ontop-spatial that is able to answer GeoSPARQL queries on top of geospatial relational databases, performing on-the-fly GeoSPARQL-to-SQL translation using ontologies and mappings.
K. Bereta, G. Xiao, M. Koubarakis
doaj +1 more source