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R2RML Parser is a tool that can export relational database contents as RDF graphs, based on an R2RML mapping document.
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R2RML Parser

An R2RML implementation that can export relational database contents as RDF graphs, based on an R2RML mapping document. Contains an R2RML mapping document for the DSpace institutional repository solution.

For more information, please visit the wiki.

Please send any feedback/questions by email to, by direct message (dm) via twitter to @nkonstantinou, or open a new issue. We'll be happy to discuss how to export your data into RDF.

Implementation details

R2RML implementation written fully in Java 7, using Apache Jena 2.11, Spring 4.0, JUnit 4.9, and Maven 3.1. Tested against MySQL 5.6, PostgreSQL 9.2 and Oracle 11g.


This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 Unported License.

You are free to use and distribute this work as long as you provide proper reference and respect the license terms.


  1. N. Konstantinou, D.E. Spanos: Creating Linked Data from Relational Databases. In Book Materializing the Web of Linked Data, Pages 73-102, Springer, 2015

  2. N. Konstantinou, D.E. Spanos, D. Kouis, N. Mitrou: An Approach for the Incremental Export of Relational Databases into RDF Graphs, In International Journal on Artificial Intelligence Tools, 24 (2), 2015 (doi:10.1142/S0218213015400138)

  3. N. Konstantinou, D. Kouis, N. Mitrou: Incremental Export of Relational Database Contents into RDF Graphs. In 4th International Conference on Web Intelligence, Mining and Semantics (WIMS'14), Thessaloniki, Greece, June 2014 (doi:10.1145/2611040.2611082) (fulltext) (slides)

  4. N. Konstantinou, D.E. Spanos, N. Houssos, N. Mitrou: Exposing Scholarly Information as Linked Open Data: RDFizing DSpace contents. In The Electronic Library, Vol. 32, No. 6, 2014 (doi:10.1108/EL-12-2012-0156) (fulltext)

  5. N. Konstantinou, D.E. Spanos, N. Mitrou: Transient and persistent RDF views over relational databases in the context of digital repositories. In 7th Metadata and Semantics Research Conference (MTSR'13), Thessaloniki, Greece, Springer, CCIS 390, pp. 342-354, November 2013 (doi:10.1007/978-3-319-03437-9_33) (fulltext) (slides) (datasets)

  6. N. Konstantinou, N. Houssos, A. Manta: Exposing Bibliographic Information as Linked Open Data using Standards-based Mappings: Methodology and Results. In 3rd International Conference on Integrated Information (IC-ININFO'13), Prague, Czech Republic, September 2013 (fulltext) (slides)

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