4,101 Hits in 3.7 sec

A Rule System for Querying Persistent RDFS Data [chapter]

Giovambattista Ianni, Thomas Krennwallner, Alessandra Martello, Axel Polleres
2009 Lecture Notes in Computer Science  
We present GiaBATA, a system for storing, aggregating, and querying Semantic Web data, based on declarative logic programming technology, namely on the dlvhex system, which allows us to implement a fully  ...  Compared with off-the-shelf RDF stores and SPARQL engines, we offer more flexible support for rule-based RDFS and other higher entailment regimes by enabling custom reasoning via rules, and the possibility  ...  System Description and Evaluation GiaBATA is based on a combination of the DLV DB [8] and dlvhex [9] systems, and caters for persistent storage of both data and ontology graphs.  ... 
doi:10.1007/978-3-642-02121-3_70 fatcat:nc7on7yndjb3djpsqs67xktbdy

System II

Gang Wu, Juanzi Li, Kehong Wang
2008 Proceeding of the 17th international conference on World Wide Web - WWW '08  
System Π takes the hypergraph representation for RDF as the data model for its persistent storage, which effectively avoids the costs of data model transformation when accessing RDF data.  ...  In this paper, we propose a native RDF repository, System Π, to pursue a better tradeoff among the above requirements.  ...  Strategy 3: For a semantic query that needs inferences for the rules in Strategy 1 or any rule not mentioned in Strategy 1 and Strategy 2, System Π will process the rules in a backward chaining manner.  ... 
doi:10.1145/1367497.1367643 dblp:conf/www/WuLW08 fatcat:2nfqbyii7balflwc4a3yjoz2eq

Dynamic Querying of Mass-Storage RDF Data with Rule-Based Entailment Regimes [chapter]

Giovambattista Ianni, Thomas Krennwallner, Alessandra Martello, Axel Polleres
2009 Lecture Notes in Computer Science  
We show that our extensions are technically feasible by providing benchmark results for RDFS querying in our prototype system GiaBATA, which uses Datalog coupled with a persistent Relational Database as  ...  SPARQL has become recently a W3C standard for querying RDF data, but it mostly provides means for querying simple RDF graphs only, whereas querying with respect to RDFS or other entailment regimes is left  ...  All the systems, except AllegroGraph and ours, adopt a persistent materialization approach for inferring data.  ... 
doi:10.1007/978-3-642-04930-9_20 fatcat:poolxwsfbjchjmbct5bn6txwqm

Rainbow: A distributed and hierarchical RDF triple store with dynamic scalability

Rong Gu, Wei Hu, Yihua Huang
2014 2014 IEEE International Conference on Big Data (Big Data)  
The RDF data indexing scheme in Rainbow is a hybrid one which is designed based on the statistical analysis of user query space.  ...  In the Big Data era, the ever-increasing RDF data have reached a scale in billions of triples and brought obstacles and challenges to single-node RDF data stores.  ...  When needing to access data on a failed in-memory store, the system can automatically switch to the persistent storage layer for the data.  ... 
doi:10.1109/bigdata.2014.7004274 dblp:conf/bigdataconf/GuHH14 fatcat:mxi5hq657vfrpn6gbyr6hsunyi

Ruby on semantic web

Vadim Eisenberg, Yaron Kanza
2011 2011 IEEE 27th International Conference on Data Engineering  
from multiple data sources, and (3) SPARQL queries and inference can be applied to objects during the run of a program.  ...  The demo includes a system, where users can run applications, written in Ruby on Semantic Web, over multiple data sources. In the demo we run code examples.  ...  , in code statements and in queries, over the data. (5) Making in-memory objects persistent by changing "DNS" rules.  ... 
doi:10.1109/icde.2011.5767945 dblp:conf/icde/EisenbergK11 fatcat:mvi2btgfbbapfkdzxzsgm6mrfm

The Jena-Based Ontology Model Inference andRetrieval Application

Luo Zhong, Mingzhu Zheng, Jingling Yuan, Jinxin Jin
2012 Intelligent Information Management  
The Jena API is applied to store CG owl documents in MySQL, set inference rule and achieve search queries on the ontology database.  ...  Finally, the Jena-based ontology model retrieval system is developed.  ...  Jena provides relational database interface into RDF data, Model, Resource, Query can be used to access and maintain RDF data. CG ontology model is mainly stored in Mysql.  ... 
doi:10.4236/iim.2012.44023 fatcat:7fmiy4hl5rdyzemkg4ix5yotpq

MDE for Publishing Data on the Semantic Web

Guillaume Hillairet, Frédéric Bertrand, Jean-Yves Lafaye
2008 ACM/IEEE International Conference on Model Driven Engineering Languages and Systems  
Publishing local data on the Semantic Web entails providing a shareable semantic data representation. We present a complete MDE approach that allows importing data sources into an RDF repository.  ...  At a preliminary stage, the object domain model is mapped to an ontology and to a persistence model. Specifying mappings requires a model annotation performed by a domain expert.  ...  Consequently, the data can be kept in their original persistence system, with no replication in an RDF repository, while being subject to the queries a user can directly express in terms of the ontology  ... 
dblp:conf/models/HillairetBL08 fatcat:docu2tlawbeqfmlyqgkjpkwjlq

A Survey on Disk Oriented Querying and Reasoning on the Semantic Web

M. del Mar Roldan-Garcia, J.F. Aldana-Montes
2006 22nd International Conference on Data Engineering Workshops (ICDEW'06)  
The analyzed approaches carry out a mapping between the (structure of the) ontology and the data model of the persistence management system.  ...  This paper presents a description of seven systems, which use database technology to both represent knowledge persistently and make scalable queries on it, in the Semantic Web context.  ...  DLP implementation system (DLP-IM) [13] is a proposal for combining rules with ontologies in the Semantic Web.  ... 
doi:10.1109/icdew.2006.21 dblp:conf/icde/GarciaM06 fatcat:xzmi5l6ptfcrtlpeyyji3kejgy

A Framework for Ontology Reuse and Persistence Integrating UML and Sesame [chapter]

Carlos Pedrinaci, Amaia Bernaras, Tim Smithers, Jessica Aguado, Manuel Cendoya
2004 Lecture Notes in Computer Science  
And based on a study of the art of the different RDF storage and querying systems, we couple this methodology with the Sesame system for providing a framework able to deal with large knowledge bases.  ...  Thus, we first present a methodology for ontology creation and automatic code generation using the widely adopted CASE UML tools.  ...  The main criteria that were kept in mind for determining the RDF storage and querying system that suits better to our needs are: Storage: The method/architecture used for ensuring the data persistance.  ... 
doi:10.1007/978-3-540-25945-9_4 fatcat:24oz6xpdnbfcpkiw2fpcl3xvqu

Twelve Theses on Reactive Rules for the Web [chapter]

François Bry, Michael Eckert
2006 Lecture Notes in Computer Science  
It presents twelve theses on features desirable for a language of reactive rules tuned to programming Web and Semantic Web applications.  ...  In particular, Web systems such as online marketplaces, adaptive (e.g., recommender) systems, and Web services, react to events such as Web page updates or data posted to a server.  ...  Working Group (  ... 
doi:10.1007/11896548_63 fatcat:uefmcgqpinfopl4jdxfeo6dkzi

RDF Storage and Retrieval Systems [chapter]

Alice Hertel, Jeen Broekstra, Heiner Stuckenschmidt
2009 Handbook on Ontologies  
In this chapter, we review RDF storage and retrieval technologies as a common approach for accessing ontology-based data.  ...  We discuss different storage models, typical functionalities of RDF middleware such as data model support and reasoning capabilities and RDF query languages with a special focus on SPARQL as an emerging  ...  For persistent storage the data can be serialized to files, but for large amounts of data the use of a database management system is more reasonable.  ... 
doi:10.1007/978-3-540-92673-3_22 dblp:series/ihis/HertelBS09 fatcat:atuhk24ekbf5thcqsgeznuxyhu


James P. McGlothlin, Latifur R. Khan
2009 Proceedings of the 2009 International Database Engineering & Applications Symposium on - IDEAS '09  
RDFKB (Resource Description Framework Knowledge Base) is a relational database system for RDF datasets which supports inference and knowledge management.  ...  Solutions which do support inference queries have done so as part of query processing. Ontologies define the rules that govern inference for RDF datasets.  ...  engine for RDF [17] , Neumann et al. propose a RDF indexing system with an efficient query processor.  ... 
doi:10.1145/1620432.1620460 dblp:conf/ideas/McGlothlinK09 fatcat:a4jslvpz2zbnzhnrikyogvgcji

Materializing and Persisting Inferred and Uncertain Knowledge in RDF Datasets

James McGlothlin, Latifur Khan
In this paper, we detail a database schema using bit vectors that is designed specifically for RDF datasets. We introduce a framework for materializing and storing inferred triples.  ...  As more complex ontologies are developed, there is a growing need for efficient queries that handle inference.  ...  Hexastore uses six indices to manage RDF data. RDF-3X uses aggregate indexes, join statistics and query optimization to support efficient queries against RDF datasets.  ... 
doi:10.1609/aaai.v24i1.7522 fatcat:7zccafjqsbaq3mvx4om6fumd7m

Query for Streaming Information

Xuanxing Yang
2018 Companion of the The Web Conference 2018 on The Web Conference 2018 - WWW '18  
among RDF stream tuples and the effective, scalable implementation of RDF stream processing system.  ...  To fill this gap, in this paper we propose CT-SPARQL and AIMRS, a language specifying for the compositional stream patterns and an architecture for adaptive incremental maintenance of RDF stream tuples  ...  These engines are designed for executing queries multiple times over a batch of persistent data.  ... 
doi:10.1145/3184558.3186573 dblp:conf/www/Yang18 fatcat:kbmetcv2lfdjleyexajgzvgopi

Ontologies-based architecture for sociocultural knowledge co-construction systems

Guidedi Kaladzavi, Papa Fary Diallo, Cedric Bere, Olivier Corby, Isabelle Minrel, Moussa Lo, Kolyang
2018 Online Journal of Applied Knowledge Management  
A more natural data model for Semantic MediaWiki (SMW) is RDF, a data format that organizes information in graphs rather than in fixed database tables.  ...  Most of them use the Resource Description Framework (RDF-based) systems in conjunction with the standard Structured Query Language (SQL) database to manage and query semantic data.  ...  authors would like to thank the Centre d'Excellence Africain en Mathématiques (CEA-MITIC), Informatique et TIC, the University of Maria (UMa), and Laboratoire d'Analyse Numérique et d'Informatique (LANI) for  ... 
doi:10.36965/ojakm.2018.6(1)226-239 fatcat:2roixkfv6ndn7dba4u65qrejpq
« Previous Showing results 1 — 15 out of 4,101 results