Linked open data
Linked open data is linked data that is open content.[1][2][3] Tim Berners-Lee gives the clearest definition of linked open data in differentiation with linked data. He defines linked data by identifying its four components, and then adds a fifth rule - open content - to define linked open data.[4][5] Large linked open data sets include DBpedia and Freebase.
History
The term linked open data has been in use since at least February, 2007, when the "Linking Open Data" mailing list[6] was created.[7] The mailing list was initially hosted by the SIMILE project[8] at the Massachusetts Institute of Technology.
Linked Open Data Cloud
The Linked Open Data Cloud is a project started in 2007 that visualizes a graph of interlinked linked data sets.[9] While the name suggests it reports only on open content, previous graphs included proprietary data and still may; the website answers the question about really being open data with: "Probably not. Unfortunately, most publishers do not publish their data with an explicit license. This leaves re-users in the dark about the specific rights that are granted or reserved by the publisher.".
References
- ↑ http://linkeddata.org/faq
- ↑ https://www.coar-repositories.org/activities/repository-observatory/second-edition-linked-open-data/7-things-you-should-know-about-open-data/
- ↑ http://openorg.ecs.soton.ac.uk/wiki/Linked_Data_Basics_for_Techies#Open_Linked_Data
- ↑ http://www.w3.org/DesignIssues/LinkedData
- ↑ http://5stardata.info/
- ↑ http://lists.w3.org/Archives/Public/public-lod/
- ↑ http://www.w3.org/wiki/SweoIG/TaskForces/CommunityProjects/LinkingOpenData/NewsArchive
- ↑ http://simile.mit.edu/mail.html
- ↑ Linking open data cloud diagram 2014, by Max Schmachtenberg, Christian Bizer, Anja Jentzsch and Richard Cyganiak. http://lod-cloud.net/