RQL: a declarative query language for RDF
Proceedings of the 11th international conference on World Wide Web
IEEE Internet Computing
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
RDFS Reasoning and Query Answering on Top of DHTs
ISWC '08 Proceedings of the 7th International Conference on The Semantic Web
Scalable Distributed Reasoning Using MapReduce
ISWC '09 Proceedings of the 8th International Semantic Web Conference
Web Semantics: Science, Services and Agents on the World Wide Web
LUBM: A benchmark for OWL knowledge base systems
Web Semantics: Science, Services and Agents on the World Wide Web
Mind the data skew: distributed inferencing by speeddating in elastic regions
Proceedings of the 19th international conference on World wide web
A pragmatic approach for RDFS reasoning over large scale instance data
OTM'07 Proceedings of the 2007 OTM Confederated international conference on On the move to meaningful internet systems - Volume Part II
Time – space trade-offs in scaling up RDF schema reasoning
WISE'05 Proceedings of the 2005 international conference on Web Information Systems Engineering
OWLIM – a pragmatic semantic repository for OWL
WISE'05 Proceedings of the 2005 international conference on Web Information Systems Engineering
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When querying RDF and RDFS data, for improving the performance, it is common to derive all triples according to RDFS entailment rules before query processing. An undesirable drawback of this approach is that a large number of triples are generated by the RDFS reasoning, and hence considerable amount of storage space is required if we materialize the RDFS closure. In this paper, we propose RDF packages, which is a time and space efficient format for RDF data. In an RDF package, a set of triples of the same class or triples having the same predicate are grouped into a dedicated node named Package. Using Packages, we can represent any metadata that can be expressed by RDF. An important feature of the RDF packages is that, when performing RDFS reasoning, the same rules can be applied without any modification, thereby allowing us to use existing RDFS reasoners. In this paper, we discuss the model of RDF packages and its rules, followed by the transformation between RDF and RDF packages. We also discuss the implementation RDF packages using an existing RDF framework. Finally, we demonstrate the performance of the proposed scheme in triple size, reasoning speed, and querying speed.