SPARQL queries
Application of SAPSO optimization algorithm to optimize SPARQL queries of BioMedical Datasets
... of SPARQL queries called RDF chain queries, a new genetic algorithm was devised called the ...chain queries by finding the order in which joins are to be carried ...
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CLASSIFICATION OF SPARQL QUERIES INTO EQUIVALENCE CLASSES OF RELEVANT QUERIES
... of SPARQL queries into equivalence ...of SPARQL queries. The idea of relevant SPARQL queries, which is introduced here, has far-reaching ramifications because it reveals hidden ...
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Answering SPARQL queries over databases under OWL 2 QL entailment regime
... In order to obtain efficient SQL queries, it is necessary that the schema follows standard best practices in the DB schema design, for example, normalisation. Usually, a normalised schema is obtained through a ...
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Ontop: answering SPARQL queries over relational databases
... the queries, some cases are still ...the SPARQL query is translated into a small SQL ...SQL queries are large unions of subqueries, Stardog still outperforms ...
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The Quranic Nature Ontology: From Sparql Endpoint to Java Application and Reasoning
... The seemingly unstructured nature of Quranic data represents a challenging problem for ontology engineers, computational linguists, information retrieval experts and search engine designers. Even though the holy Quran ...
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Flexible query processing for SPARQL
... of SPARQL queries to be executed over the RDF ...of queries is passed to the Evaluator, which interacts with the Optimiser and the Cache to improve query perfor- mance — we discuss the Optimiser and ...
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Enriching An Academic knowledge base using Linked Open Data
... express queries across diverse data sources, whether the data is stored natively as RDF or viewed as RDF via ...using SPARQL for extracting the instances from these RDF resources on the LOD ...executed ...
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From XML to RDF: A New Semantic Information Retrieval System
... format. SPARQL is emerging as the de facto RDF query language [24]. So, SPARQL (a recursive acronym for SPARQL Protocol and RDF Query Language) is an RDF query language, that is, a query language for ...
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The SPARQL usage for mapping maintenance and reuse methodology
... standard SPARQL queries. Thus, it is necessary to test that SPARQL, as a query language, can perform these ...experiment, SPARQL is tested on its ability to effectively perform each of these ...
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SPARQL query processing with conventional relational database systems
... for SPARQL queries over its in-memory and on-disk stores, but does not have a query engine that translates into relational expressions in the way that 3store and sparql2sql ...and SPARQL query parser ...
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Title: A SPARQL QUERY GENERATION MECHANISM ON RDF
... keyword queries to fulfil their information needs on the ...data. SPARQL queries are able to retrieve more relevant results than general keyword routing on RDF ...keyword queries to ...
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Efficient handling of SPARQL OPTIONAL for OBDA
... of SPARQL and equivalent SQL ...Docker. Queries. In total, we consider 11 SPARQL queries. Queries Q1–Q4 are based on the original BSBM queries 2, 3, 7 and 8, which contain ...
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TORAGE , I NDEXING , Q UERYP ROCESSING AND ENCHMARKING IN CENTRALIZED AND ISTRIBUTED RDF NGINES : A S URVEY
... translating SPARQL queries into ...of SPARQL into SQL by parsing the SPARQL query parsed into algebra tree and through Jena ARQ 48 , and then optimizations like a filter, ...
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A Comprehensive Comparative study of SPARQL and SQL
... in SparQL queries is similar to a join, in which shared SparQL variables within triple patterns essentially define a join condition specifying ...a SparQL query that can be used to search 4 ...
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Integration of Web APIs and Linked Data using SPARQL Micro-Services. Application to Biodiversity Use Cases
... of SPARQL micro-services published from independent service providers, allowing Linked Data-based applications to glean pieces of data from a wealth of distributed, scalable and reliable ...discovery, ...
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International Journal of Computer Science and Mobile Computing
... Trinity.RDF and TriAD are probably the most recently proposed distributed RDF engines for web-scale RDF data. Trinity.RDF uses main memory to store the RDF data and hence can achieve very low data access latency. Instead ...
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Querying Semantic Web Data Sets by Using SPARQL
... Some analysis has been done on the topic of RDF stores which can handle large datasets. (A large dataset in this context is usually considered one on the order of tens or hundreds of millions of triples). The W3C ESW ...
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AGUIA: autonomous graphical user interface assembly for clinical trials semantic data services
... generates queries in S3QL, which transforms the data into S3DB RDF state- ...S3QL queries, whereas the reference SPARQL queries are limited to data ...
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Smart Search Methods in Expert Database Systems
... of SPARQL queries by regression model and Euclidean distance, ii) predicted the potential subsequent queries by leverage machine learning technique, iii) prefetched and cached the results of ...
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Validating Interlinks between Linked Data Datasets with the SUMMR Methodology
... Abstract. Linked Data datasets use interlinks to connect semantically similar resources across datasets. As datasets evolve, a resources locator can change which can cause interlinks that contain old resource locators, ...
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