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Using AberOWL for fast and scalable reasoning over BioPortal ontologies
2016
Journal of Biomedical Semantics
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Acknowledgements This paper is an extended version of a conference paper by the same name, presented at ICBO 2015. ...
by the number of queries executed in parallel
Fig. 3 3 Query times over the NCI Thesaurus
Table 1 1 Summary of Ontologies used in our test Total
© 2016 The Author(s). ...
Figure 1 shows the query times for the ontologies based on the type of query, and Fig. 2 shows the query times based on different number of queries run in parallel. ...
doi:10.1186/s13326-016-0090-0
pmid:27502585
pmcid:PMC4976511
fatcat:nxvmvxi6evbo5dk3amtqmfvc2u
Scalable Queries Over Log Database Collections
[chapter]
2015
Lecture Notes in Computer Science
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FLOQ provides general and extensible mechanisms for efficient processing of queries over different kinds of distributed data sources. ...
Scalable Queries over Log Database Collections. Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 1343. 51 pp. ...
To process queries over geographically distributed log databases, I developed two new join strategies, parallel bind-join (PBJ) and parallel bulk-load join (PBLJ). ...
doi:10.1007/978-3-319-20424-6_17
fatcat:uu5rpgzxo5g2xidzlhrbcvgzbi
Ontology-Based Integration of Streaming and Static Relational Data with Optique
2016
Proceedings of the 2016 International Conference on Management of Data - SIGMOD '16
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A complex diagnostic task may require a collection of up to hundreds of queries over such data. ...
In a nutshell, OP-TIQUE allows complex diagnostic tasks to be expressed with just a few high-level semantic queries. ...
While running the tests they will monitor the throughput and progress of parallel query execution processes. ...
doi:10.1145/2882903.2899385
dblp:conf/sigmod/KharlamovBJKLMN16
fatcat:r5hcgvmrurbe7a6rxjenrcn4xq
Massive parallelism for query answering in weakly integrated P2P systems
2004
Proceedings. 15th International Workshop on Database and Expert Systems Applications, 2004.
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We show that the algorithm supports the high parallelism in the process of query answering from different peers. ...
A new set of requirements for query processing has emerged, as Internet and Web-based query systems have become more prevalent. ...
x ) of £ ¤ can be parallelized. -Incremental query answering with parallelism: This process combines the incremental answering with the parallelism. ...
doi:10.1109/dexa.2004.1333528
dblp:conf/dexaw/Majkic04
fatcat:eam5kdk6u5crrm7i6sdywmub34
A Knowledge Integration Framework for Information Visualization
[chapter]
2005
Lecture Notes in Computer Science
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Our examples present hierarchical clustering of gene expression data, coordinated with a parallel coordinates view and with the gene annotation and gene ontology. ...
The novel parallel coordinates view [6] powered by a direct-manipulation search, offers strong advantages, but requires some training for most users. ...
In the parallel coordinates view, users can submit a new query over the current query result. ...
doi:10.1007/978-3-540-31842-2_21
fatcat:57qn7n4pyna3xhxqvpu6zugz2u
Towards a Mediator Based on OWL and SPARQL
[chapter]
2009
Lecture Notes in Computer Science
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The Mediator supports mappings between the OWL Ontology of the Mediator and the other ontologies in the federated sites. ...
SPARQL queries submitted to the Mediator are decomposed and reformulated to SPARQL queries to the federated sites. The evaluated results return to the Mediator. ...
We assume that an initial SPARQL query is posed over the source ontology presented in Fig. 1 and is reformulated to a semantically equivalent query in order to be posed over the target ontology of Fig ...
doi:10.1007/978-3-642-04754-1_34
fatcat:7juggrh74zc5tbpaegceabqxia
LiteMat: a scalable, cost-efficient inference encoding scheme for large RDF graphs
[article]
2015
arXiv
pre-print
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Query processing in the presence of inferences is one them. ...
We will show how this encoding can be computed by a scalable parallel algorithm and directly be implemented over the Apache Spark framework. ...
From a query processing point of view, to achieve completeness of result sets, RDF query processors have to integrate information that is inferred using these ontologies. ...
arXiv:1510.03409v1
fatcat:yaz64mu6y5fezi56uhxqoromay
Scalable Reduction of Large Datasets to Interesting Subsets
2010
Social Science Research Network
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We present a system that combines the computational power of large clusters for enabling large-scale reasoning and data access with an efficient data structure for storing and querying the accessed data ...
Traditional approaches to storing, querying, and reasoning fall short when faced with web-scale data. ...
this work was provided in part by a seedling grant from DARPA's Transformational Convergence Technology Office and gifts from Lockheed Martin Advanced Technology Laboratories and Fujitsu Laboratories of ...
doi:10.2139/ssrn.3199489
fatcat:josf5g6fozhxlkcwq7md36n5qe
A semantic approach to polystores
2016
2016 IEEE International Conference on Big Data (Big Data)
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In the database community Polystores is an emerging and promising approach for data federation that aims at designing a unified querying layer over multiple data models. ...
In the Semantic Web community a similar in spirit approach of Ontology-Based Data Access (OBDA) has been recently proposed, attracted a lot of attention, and proved its success in several industrial scenarios ...
can be accessed by posing queries over the ontology, i.e., ontological queries. ...
doi:10.1109/bigdata.2016.7840898
dblp:conf/bigdataconf/KharlamovMBBBJL16
fatcat:qoo6qitn4nf6jiqwltr7ehqj3a
Scalable reduction of large datasets to interesting subsets
2010
Journal of Web Semantics
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We present a system that combines the computational power of large clusters for enabling large-scale reasoning and data access with an efficient data structure for storing and querying the accessed data ...
Traditional approaches to storing, querying, and reasoning fall short when faced with web-scale data. ...
this work was provided in part by a seedling grant from DARPA's Transformational Convergence Technology Office and gifts from Lockheed Martin Advanced Technology Laboratories and Fujitsu Laboratories of ...
doi:10.1016/j.websem.2010.08.002
fatcat:33njao7cjfdrlgjk6jnm4wip7y
Query processing in a three-level ontology-based data integration system
2010
Proceedings of the 12th International Conference on Information Integration and Web-based Applications & Services - iiWAS '10
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First, the query is decomposed, using the mediated mappings, into a set of elementary sub-queries expressed in terms of the application ontologies. ...
This paper focus on a method for query processing that addresses the problem of efficient query answering. ...
These experiments will provide empirical evidences of the scalability of our query answering approach using sets of very large ontologies. ...
doi:10.1145/1967486.1967532
dblp:conf/iiwas/PinheiroVMSCP10
fatcat:yoddiuorvrgatbkzn4otjq2sju
Query Processing in a Mediator Based Framework for Linked Data Integration
2011
International Journal of Business Data Communications and Networking
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First, the query is decomposed, using the mediated mappings, into a set of elementary sub-queries expressed in terms of the application ontologies. ...
The main contribution of the paper is an algorithm for reformulating a user query into sub-queries over the data sources. ...
The potential cost reduction obtained by parallelizing sub-query processing. ...
doi:10.4018/jbdcn.2011040103
fatcat:mxxb6w3xpjg2xhlllaonuur2ly
NGS: a framework for multi-domain query answering
2008
2008 IEEE 24th International Conference on Data Engineering Workshop
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services, (b) covers query formulation aspects over the global ontology, and query rewriting in terms of the actual services, and (c) offers several optimization opportunities leveraging the characteristics ...
In particular, NGS (a) integrates different kinds of services (search engines, web services, and wrapped web pages) into a global ontology, i.e., a unified view of the concepts supported by the available ...
ACKNOWLEDGEMENTS All authors acknowledge support from Italian PRIN project "New technologies and tools for the integration of Web search services". ...
doi:10.1109/icdew.2008.4498328
dblp:conf/icde/BragaCCCDMMT08
fatcat:ge4qk6gqwzbvpowsbgztq5ykuu
A survey of large-scale reasoning on the Web of data
2018
Knowledge engineering review (Print)
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In order to provide a first complete overview of the field, this paper reports a systematic review of such scalable reasoning approaches over various ontological languages, reporting details about the ...
These systems differ significantly; for instance in terms of reasoning expressivity, computational properties such as completeness, or reasoning objectives. ...
"III: Small: TROn -Tractable Reasoning with Ontologies." ...
doi:10.1017/s0269888918000255
fatcat:bergc5uphbceznigppektgvzrm
Ontologies and text retrieval
2002
Knowledge engineering review (Print)
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over such processing. ...
the existence of large amounts of parallel ontological/textual data. ...
doi:10.1017/s026988890200036x
fatcat:houfurmrunfotkk66o7uh5micm
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