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Continuous SPARQL (C-SPARQL)

Continuous SPARQL (C-SPARQL) is a new language for continuous queries over streams of RDF data. C-SPARQL queries consider windows, i.e., the most recent triples of such streams, observed while data is continuously flowing. Supporting streams in RDF format guarantees interoperability and opens up important applications, in which reasoners can deal with knowledge evolving over time. Examples of such application domains include real-time reasoning over sensors, urban computing, and social semantic data. Hereafter you can download a "ready to go pack" to start using C-SPARQL yourself.

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CSPARQL-ReadyToGoPack-0.9 released on 5.5.2013

Older versions:

CSPARQL-ReadyToGoPack-0.8 released on 30.3.2013
SPARQL-ReadyToGoPack-0.7.4 released on 9.5.2012
CSPARQL-ReadyToGoPack-0.7.3 released on 18.10.2011
CSPARQL-ReadyToGoPack-0.7.1 released on 9.6.2011
CSPARQL-ReadyToGoPack-0.7 released on 30.5.2011

Prerequisite

C-SPARQL Engine is written in Java 1.6. The "ready to go pack" is an Eclipse project

Start Using

Download the zip
Unzip in your Eclipse workspace
Import the project in your Eclipse
Try to understand the HelloWorldCSPARQL.java class

Known Limitation

The following features are not supported in this package:

FROM NAMED clauses
COMPUTE EVERY clasue
timestamp function on named graphs
reasoning support (i.e., only simple RDF entailment is supported)

Known Bugs

Open bugs in version 0.9:

anonymous nodes are not handled correctly

The following bugs where reported on version 0.7, 0.7.1, 0.7.3 and were fixed in version 0.7.4:

type of typed literals disappear when processed by C-SPARQL FIXED
some IRIs used to identify streams result in a parse error FIXED
queries with multiple FROM STREAM clauses rise an exception FIXED
missing classes exceptions FIXED

Getting Support

For more information on C-SPARQL language see the Stream Reasoning for Linked Data tutorial that we gave at ESWC 2011 and SemTech 2011 or contact emanuele.dellavalle-at-polimi.it for more.

Licence

The C-SPARQL "ready to go pack" is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose.

C-SPARQL by Davide Barbieri and Emanuele Della Valle is licensed under a Creative Commons Attribuzione - Non commerciale - Condividi allo stesso modo 3.0 Unported License. Permissions beyond the scope of this license may be available writing to This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Acknowledgements

This work was partially supported by the European project LarKC (FP7-215535).