Apache Marmotta

Apache Marmotta is a linked data platform that comprises several components. In its most basic configuration it is a Linked Data server.[1][2] Marmotta is one of the reference projects early implementing the new Linked Data Platform [3][4][5] recommendation that is being developed by W3C.

Apache Marmotta
Developer(s)Apache Software Foundation
Initial releaseOctober 3, 2013 (2013-10-03)
Stable release
3.4.0 / June 12, 2018 (2018-06-12)
RepositoryMarmotta Repository
Written inJava
Available inEnglish
TypeTriplestore, rule reasoner
LicenseApache License 2.0

It has been contributed by Salzburg Research from the Linked Media Framework,[6][7][8][9] and continues its versioning, hence starting at version 3.0.0.

Since April 2013, it is listed among the Semantic Web tools by the W3C.[10]

In December 2013, it has been nominated as "one of the ASF's most active projects".[11][12]


The project is split in several parts: the platform itself, which includes full Read Write Linked Data, SPARQL, LDP, Reasoning, and basic security. In addition to the platform, the project develops some libraries can also be used separately:

  • KiWi, a Triplestore built on top of a relational database.
  • LDPath, a path language to navigate across Linked Data resources.
  • LDClient, a Linked Data client that allows retrieval of remote resources via different protocols by making use of pluggable adapters (data providers) that wrap other data sources (such as YouTube and Facebook).[13]
  • LDCache, a cache system that automatically retrieves resources by internally using LDClient.


Linked Media Framework (pre-Apache)

Apache Marmotta is the continuation of the open source Linked Media Framework published in early 2012.[14][15]

Apache Marmotta

  • On November 16, 2012 it is proposed to the Apache Software Foundation under the name of Apache Linda, later changed to Apache Marmotta in order to avoid confusion with the Linda language.[16]
  • On 3 December 2012 Marmotta enters incubation.[17]
  • On April 26, 2013 Marmotta 3.0.0-incubating is released.[18]
  • On October 3, 2013 Marmotta 3.1.0-incubating is released.[19]
  • On November 2013, it graduated as top-level project.[20][21][22]
  • On April 2014, the project released its first actual release under the umbrella of the Apache Software Foundation: 3.2.0 version.[23]
  • On 5 December 2014, the project published the version 3.3.0.[24][25]

Notable users


  • Bachmann-Gmur, Reto (July 26, 2013). Instant Apache Stanbol (1st ed.). Packt Publishing. ISBN 978-1783281237.
  • Kaschesky, Michael; Selmi, Luigi (June 2013). Fusepool R5 linked data framework: concepts, methodologies, and tools for linked data. ACM New York. pp. 156–165. ISBN 978-1-4503-2057-3.
  • Zukunft Von Linked Media: Trends, Entwicklungen Und Visionen [The future of Linked Media: trends, discoveries and visions.] (in German) (1st ed.). Salzburg Research Forschungsgesellschaft. 14 May 2013. ISBN 978-3902448361.
  • Qualitätssicherung Bei Annotationen [Quality assurance in annotations] (in German). Salzburg Research Forschungsgesellschaft. 2 January 2013. ISBN 978-3902448323.
  • Hassnaa, Moustafa; Zeadally, Sherali, eds. (14 May 2012). Media Networks: Architectures, Applications, and Standards. CRC Press. ISBN 9781439877289. an ongoing open source development used to demonstrate the concepts of semantic lifting and interlinking of media resources
  • Linked Media Interfaces. Salzburg Research Forschungsgesellschaft. 5 October 2011. ISBN 978-3902448293.
  • Linked Media. Ein White-Paper zu den Potentialen von Linked People, Linked Content und Linked Data [A white paper on the potential of Linked People, Linked Content and Linked Data.] (in German). Salzburg Research Forschungsgesellschaft. 26 April 2011. p. 8. ISBN 978-3902448279.


  1. "Apache Marmotta". Apache Marmotta. Retrieved 2013-08-20.
  2. GmbH, RedLink. "Apache Marmotta™ (top-level project) is an Open Platform for Linked Data". redlink. Retrieved 1 August 2014.
  3. Steve Speicher; John Arwe; Ashok Malhotra (July 30, 2013). Linked Data Platform 1.0 (Last Call Working Draft ed.). W3C. Retrieved 2013-11-24.
  4. "LDP Implementations". W3C LDP Working Group. Retrieved 2013-11-24.
  5. "LDP Implementation Report for Apache Marmotta". Retrieved 2014-09-21.
  6. "Linked Media Framework". Archived from the original on 2013-07-08. Retrieved 2019-05-24.
  7. "Apache Marmotta incubation proposal". Apache. Retrieved 2013-08-20.
  8. "Apache Marmotta - Acknowledgements". Apache Marmotta. Retrieved 2013-08-20.
  9. "Apache Marmotta is now a Top Level Apache Project". Redlink GmbH. Retrieved 2013-11-25.
  10. W3C - Semantic Web - Apache Marmotta
  11. "The ASF asks: Have you met Apache(tm) Marmotta(tm)?". The Apache Software Foundation. Retrieved 2013-12-25.
  12. "The ASF asks: Have you met Apache(tm) Marmotta(tm)?". The Apache Software Foundation. Retrieved 2013-12-25.
  13. "Converter to RDF". W3C. Retrieved 2013-08-20.
  14. "W3C - Semantic Web - Apache Marmotta". W3C. Retrieved 2013-12-25.
  15. Schaffert, Sebastian (26 April 2013). "[ANNOUNCE] Apache Marmotta 3.0.0-incubating released!". announce@apache.org (Mailing list). Retrieved 2013-12-25.
  16. "Apache Marmotta (was: Apache Linda)". org.apache.incubator.general (Mailing list). 16 November 2012. Retrieved 2013-12-25.
  17. "Marmotta Project Incubation Status page". Apache. Retrieved 2013-08-20.
  18. Schaffert, Sebastian (26 April 2013). "Apache Marmotta 3.0.0-incubating released!". semantic-web AT w3.org (Mailing list). Retrieved 2013-11-21.
  19. Schaffert, Sebastian (3 October 2013). "Apache Marmotta 3.1.0-incubating released!". semantic-web AT w3.org (Mailing list). Retrieved 2013-11-21.
  20. Frank, Jakob (28 October 2013). "org.apache.incubator.general". Retrieved 2013-12-25.
  21. "Apache Marmotta graduated to top-level project". Salzburg Research. Retrieved 2013-12-25.
  22. "Resolved to establish the Apache Marmotta Project". ASF. Archived from the original on 2013-12-02.
  23. Frank, Jakob (9 April 2014). "[RESULT][VOTE] Release Apache Marmotta 3.2.0". Retrieved 2014-09-21.
  24. Frank, Jakob (18 December 2014). "[ANNOUNCE] Apache Marmotta 3.3.0 released". Retrieved 2015-01-05.
  25. "Apache Marmotta - Download". marmotta.apache.org. Retrieved 2016-01-28.
  26. Georg Güntner, Sebastian Schaffert (June 30, 2013). A Marmot against the Flood of Data (PDF). Salzburg NewMediaLab. Retrieved 2013-11-24.
  27. Open Data portal
  28. Cirullo, Raffaele. "Free dataset! Linked data are necessary to do business". Retrieved 2013-08-20.
  29. Redlink
  30. "Fusepool Linked Datapool for Technology Intelligence" (PDF). Archived from the original (PDF) on 2013-12-27. Retrieved 2013-12-25.
  31. "MICO Kick-off Meeting in Salzburg". Retrieved 2013-12-25.
  32. "DPLA wiki". Retrieved 2015-09-22.
  33. "Frequently Asked Questions". Retrieved 2018-03-27.
  34. "WordLift: Meaningful Navigation Systems and Content Recommendation for News Sites running WordPress" (PDF). Retrieved 2018-03-27.
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