Extensible/rule based query rewrite optimization in Starburst
SIGMOD '92 Proceedings of the 1992 ACM SIGMOD international conference on Management of data
The design and implementation of the redland RDF application framework
Proceedings of the 10th international conference on World Wide Web
Sesame: A Generic Architecture for Storing and Querying RDF and RDF Schema
ISWC '02 Proceedings of the First International Semantic Web Conference on The Semantic Web
A path-based relational RDF database
ADC '05 Proceedings of the 16th Australasian database conference - Volume 39
LUBM: A benchmark for OWL knowledge base systems
Web Semantics: Science, Services and Agents on the World Wide Web
Containment and minimization of RDF/S query patterns
ISWC'05 Proceedings of the 4th international conference on The Semantic Web
CoMoGIS'06 Proceedings of the 2006 international conference on Advances in Conceptual Modeling: theory and practice
Semantics and complexity of SPARQL
ISWC'06 Proceedings of the 5th international conference on The Semantic Web
SPARQL basic graph pattern optimization using selectivity estimation
Proceedings of the 17th international conference on World Wide Web
Towards a Mediator Based on OWL and SPARQL
WSKS '09 Proceedings of the 2nd World Summit on the Knowledge Society: Visioning and Engineering the Knowledge Society. A Web Science Perspective
SPARQL Query Re-writing Using Partonomy Based Transformation Rules
GeoS '09 Proceedings of the 3rd International Conference on GeoSpatial Semantics
Selecting materialized views for RDF data
ICWE'10 Proceedings of the 10th international conference on Current trends in web engineering
R2DF framework for ranked path queries over weighted RDF graphs
Proceedings of the International Conference on Web Intelligence, Mining and Semantics
PigSPARQL: mapping SPARQL to Pig Latin
Proceedings of the International Workshop on Semantic Web Information Management
Database foundations for scalable RDF processing
RW'11 Proceedings of the 7th international conference on Reasoning web: semantic technologies for the web of data
A peer-based approach to privacy-preserving context management
CONTEXT'11 Proceedings of the 7th international and interdisciplinary conference on Modeling and using context
The comparison between histogram method and index method in selectivity estimation
ICIC'11 Proceedings of the 7th international conference on Advanced Intelligent Computing Theories and Applications: with aspects of artificial intelligence
Heuristics-based query optimisation for SPARQL
Proceedings of the 15th International Conference on Extending Database Technology
Evaluating graph traversal algorithms for distributed SPARQL query optimization
JIST'11 Proceedings of the 2011 joint international conference on The Semantic Web
Building an efficient RDF store over a relational database
Proceedings of the 2013 ACM SIGMOD International Conference on Management of Data
TripleBit: a fast and compact system for large scale RDF data
Proceedings of the VLDB Endowment
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The Semantic Web community has proposed several query languages for RDF before the World Wide Web Consortium started to standardize SPARQL. Due to the declarative nature of the query language, a query engine should be responsible to choose an efficient evaluation strategy. Although all RDF repositories provide query capabilities, some of them require manual interaction to reduce query execution time by several orders of magnitude.In this paper, we propose the SPARQL query graph model (SQGM) supporting all phases of query processing. On top of the SQGM we defined transformations rules to simplify and to rewrite a query. Based on these rules we developed heuristics to achieve an efficient query execution plan. Experiments illustrate the potential of our approach.