Apache Marmotta

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Apache Marmotta
The logo of Apache Marmotta
Developer(s) Apache Software Foundation
Initial release 2013-10-03
Development status Active
Written in Java
Operating system Cross-platform
Available in English
Type Triplestore, Rule Reasoner
License Apache License 2.0
Website marmotta.apache.org

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.

It has been contributed by Salzburg Research from the Linked Media Framework,[6][7][8] 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.[9]

In December 2013, it has been nominated as "one of the ASF's most active projects".[10][11]


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).[12]
  • LDCache, a cache system that automatically retrieves resources by internally using LDClient.


Linked Media Framework (pre-Apache)[edit]

Apache Marmotta is the continuation of the open source Linked Media Framework published in early 2012.[13][14]

Apache Marmotta[edit]

  • On 3 December 2012 Marmotta enters incubation.[16]
  • On April 26, 2013 Marmotta 3.0.0-incubating is released.[17]
  • On October 3, 2013 Marmotta 3.1.0-incubating is released.[18]
  • In April 2014 the project released its first actual release under the umbrella of the Apache Software Foundation: 3.2.0 version.[22]

Prominent users[edit]



  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. ^ "Apache Marmotta incubation proposal". Apache. Retrieved 2013-08-20. 
  7. ^ "Apache Marmotta - Acknowledgements". Apache Marmotta. Retrieved 2013-08-20. 
  8. ^ "Apache Marmotta is now a Top Level Apache Project". Redlink GmbH. Retrieved 2013-11-25. 
  9. ^ W3C - Semantic Web - Apache Marmotta
  10. ^ "The ASF asks: Have you met Apache(tm) Marmotta(tm)?". The Apache Software Foundation. Retrieved 2013-12-25. 
  11. ^ "The ASF asks: Have you met Apache(tm) Marmotta(tm)?". The Apache Software Foundation. Retrieved 2013-12-25. 
  12. ^ "Converter to RDF". W3C. Retrieved 2013-08-20. 
  13. ^ "W3C - Semantic Web - Apache Marmotta". W3C. Retrieved 2013-12-25. 
  14. ^ announce@apache.org mailing list. 26 April 2013. http://mail-archives.us.apache.org/mod_mbox/www-announce/201304.mbox/%3CB157D25D-A49B-46CA-A4F0-71C6566CE924@apache.org%3E. Retrieved 2013-12-25.
  15. ^ "Apache Marmotta (was: Apache Linda)". org.apache.incubator.general mailing list. 16 November 2012. http://markmail.org/thread/qesb3rbb2tyt3eti. Retrieved 2013-12-25.
  16. ^ "Marmotta Project Incubation Status page". Apache. Retrieved 2013-08-20. 
  17. ^ Schaffert, Sebastian (26 April 2013). "Apache Marmotta 3.0.0-incubating released!". semantic-web AT w3.org mailing list. http://lists.w3.org/Archives/Public/semantic-web/2013Apr/0209.html. Retrieved 2013-11-21.
  18. ^ Schaffert, Sebastian (3 October 2013). "Apache Marmotta 3.1.0-incubating released!". semantic-web AT w3.org mailing list. http://lists.w3.org/Archives/Public/semantic-web/2013Oct/0040.html. Retrieved 2013-11-21.
  19. ^ Frank, Jakob (28 October 2013). "org.apache.incubator.general". Retrieved 2013-12-25. 
  20. ^ "Apache Marmotta graduated to top-level project". Salzburg Research. Retrieved 2013-12-25. 
  21. ^ "Resolved to establish the Apache Marmotta Project". ASF. 
  22. ^ Frank, Jakob (9 April October 2014). "[RESULT][VOTE] Release Apache Marmotta 3.2.0". Retrieved 2014-09-21.  Check date values in: |date= (help)
  23. ^ Georg Güntner, Sebastian Schaffert (June 30, 2013). A Marmot against the Flood of Data. Salzburg NewMediaLab. Retrieved 2013-11-24. 
  24. ^ Cirullo, Raffaele. "Free dataset! Linked data are necessary to do business". Retrieved 2013-08-20. 
  25. ^ Fusepool Linked Datapool for Technology Intelligence
  26. ^ "MICO Kick-off Meeting in Salzburg". Retrieved 2013-12-25. 

External links[edit]