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What is Linked Data?
What is Linked Data?
Published: 2012/06/16
Channel: Manu Sporny
Tim Berners-Lee: The next Web of open, linked data
Tim Berners-Lee: The next Web of open, linked data
Published: 2009/03/13
Channel: TED
Why Linked Data?
Why Linked Data?
Published: 2013/08/05
Channel: Ordnance Survey
Web 3.0, Linked Data, and the Semantic Web: What
Web 3.0, Linked Data, and the Semantic Web: What's this all about?
Published: 2016/09/06
Channel: Microsoft Research
Build a Small Knowledge Graph Part 1 of 3: Creating and Processing Linked Data
Build a Small Knowledge Graph Part 1 of 3: Creating and Processing Linked Data
Published: 2014/06/25
Channel: Google Developers
Linked Open Data - What is it?
Linked Open Data - What is it?
Published: 2012/02/28
Channel: EuropeanaEU
LOD Laundromat - Best Linked Open Data Application 2015
LOD Laundromat - Best Linked Open Data Application 2015
Published: 2015/10/05
Channel: Stichting Geonovum
KOMMA: Modeling with RDF and linked data
KOMMA: Modeling with RDF and linked data
Published: 2016/11/24
Channel: Eclipse Foundation
Semantic Web Tutorial 14/14: Linked Data
Semantic Web Tutorial 14/14: Linked Data
Published: 2014/03/16
Channel: Noureddin Sadawi
How to Build Linked Data APIs with JSON LD and Hydra
How to Build Linked Data APIs with JSON LD and Hydra
Published: 2014/10/02
Channel: ProgrammableWeb
Linked Data Service LINDAS (dt. Version)
Linked Data Service LINDAS (dt. Version)
Published: 2016/05/02
Channel: E-Government Schweiz
Linked Data Services
Linked Data Services
Published: 2016/08/25
Channel: ExLibrisLtd
Designing with Linked Data
Designing with Linked Data
Published: 2016/09/28
Channel: UXLx - User Experience Lisbon
Linked Data (and the Web of Data)
Linked Data (and the Web of Data)
Published: 2010/10/28
Channel: DERIGalway
Neo4j Online Meetup #2: Graph Databases, RDF, and linked data
Neo4j Online Meetup #2: Graph Databases, RDF, and linked data
Published: 2017/03/02
Channel: Neo4j - the World's Leading Graph Database
Linked Data for Libraries, Archives and Museums
Linked Data for Libraries, Archives and Museums
Published: 2014/06/19
Channel: FreeYourMetadata
Linked Data Success Story
Linked Data Success Story
Published: 2012/11/21
Channel: David Wood
Linked Data for Libraries
Linked Data for Libraries
Published: 2012/08/09
Channel: OCLCVideo
Gov 2.0 Expo 2010:   Tim Berners-Lee, "Open, Linked Data for a Global Community"
Gov 2.0 Expo 2010: Tim Berners-Lee, "Open, Linked Data for a Global Community"
Published: 2010/05/26
Channel: O'Reilly
Big Data: R and Linked Data Streams
Big Data: R and Linked Data Streams
Published: 2009/05/03
Channel: O'Reilly
Linked Data in Sweden 2017
Linked Data in Sweden 2017
Published: 2017/04/26
Channel: Semantic Web LiU
The World of Linked Open Data
The World of Linked Open Data
Published: 2015/11/10
Channel: NetworkedPlanet
MarcEdit: Linked Data linking tools update
MarcEdit: Linked Data linking tools update
Published: 2016/09/27
Channel: tpreese
MOOC Semantic Web and Linked Data: Course presentation
MOOC Semantic Web and Linked Data: Course presentation
Published: 2017/05/16
Channel: UPM
Diego Eis - Linked Data, JSON-LD e Web Semântica - BrazilJS Conf 2016
Diego Eis - Linked Data, JSON-LD e Web Semântica - BrazilJS Conf 2016
Published: 2016/09/21
Channel: BrazilJS
Walk Before You Run: Prerequisites to Linked Data
Walk Before You Run: Prerequisites to Linked Data
Published: 2015/02/25
Channel: OCLCVideo
Valerio Maggio - Semantic Python: Mastering Linked Data with Python
Valerio Maggio - Semantic Python: Mastering Linked Data with Python
Published: 2014/07/26
Channel: PyData
Linked Data Signatures
Linked Data Signatures
Published: 2015/02/17
Channel: Manu Sporny
Using SPARQL to visualise Linked Data
Using SPARQL to visualise Linked Data
Published: 2009/07/21
Channel: TalisVideos
From Big Data to Linked Data: Making Sense of Massive, Highly Connected, Multi-structured Datasets
From Big Data to Linked Data: Making Sense of Massive, Highly Connected, Multi-structured Datasets
Published: 2015/08/28
Channel: Accumulo Summit
Linked Data Analysis by David Bianco
Linked Data Analysis by David Bianco
Published: 2015/09/04
Channel: The Bro Platform
Data Structures: Introduction to Linked Lists
Data Structures: Introduction to Linked Lists
Published: 2012/07/25
Channel: ReelLearning
Linking Data Sets: Part 1 - Creating and editing data set links
Linking Data Sets: Part 1 - Creating and editing data set links
Published: 2015/08/13
Channel: Oracle Big Data Discovery
Seminario Linked Data
Seminario Linked Data
Published: 2017/01/06
Channel: Jose Aguilar
Swissbib Goes Linked Data
Swissbib Goes Linked Data
Published: 2016/12/21
Channel: SWIB
Linked Data: El protocolo para implementar la Web Semántica
Linked Data: El protocolo para implementar la Web Semántica
Published: 2012/12/20
Channel: INVESTIGACIÓN Y DESARROLLO
Web Semantica, Linked Data y Big Data
Web Semantica, Linked Data y Big Data
Published: 2016/10/25
Channel: Adam Sanchez
How to Design & Build Semantic Applications with Linked Data
How to Design & Build Semantic Applications with Linked Data
Published: 2017/06/20
Channel: Dublin Core YouTube
Microsoft Office Excel 2013 Tutorial: Linking Data Between Worksheets | K Alliance
Microsoft Office Excel 2013 Tutorial: Linking Data Between Worksheets | K Alliance
Published: 2013/09/12
Channel: K Alliance
Julie Walker on Georgia
Julie Walker on Georgia's Investment in Linked Data
Published: 2017/01/05
Channel: NoveList
Microsoft PowerPivot: Import Linked Data from Excel
Microsoft PowerPivot: Import Linked Data from Excel
Published: 2010/04/08
Channel: sqlserver
Tech Talk: The future of distributed, content linked data with IPFS
Tech Talk: The future of distributed, content linked data with IPFS
Published: 2017/06/14
Channel: Fullstack Academy
DBpedia: Visualising Linked Data. Graph of Members of Punk Rock Bands
DBpedia: Visualising Linked Data. Graph of Members of Punk Rock Bands
Published: 2013/05/31
Channel: David Sherlock
How to upload linked data and query with SPARQL using Fuseki on Windows
How to upload linked data and query with SPARQL using Fuseki on Windows
Published: 2015/11/28
Channel: Asif Karim
BBC use of linked data and semantic web in wildlife pages
BBC use of linked data and semantic web in wildlife pages
Published: 2013/10/02
Channel: Fabien Gandon
Linked Data Fragments -- Scalable Web-querying
Linked Data Fragments -- Scalable Web-querying
Published: 2014/03/11
Channel: Ruben Verborgh
Linked Data Fragments: Querying multiple Linked Data sources on the Web
Linked Data Fragments: Querying multiple Linked Data sources on the Web
Published: 2017/04/23
Channel: Dublin Core YouTube
Ten Years of Linked Data at the BBC: Implementing a user-focused semantic architecture
Ten Years of Linked Data at the BBC: Implementing a user-focused semantic architecture
Published: 2016/09/08
Channel: Data To Value
DrupalCon Austin 2014: LINKED DATA + DRUPAL FOR OCEANOGRAPHIC DATA MANAGEMENT
DrupalCon Austin 2014: LINKED DATA + DRUPAL FOR OCEANOGRAPHIC DATA MANAGEMENT
Published: 2014/06/04
Channel: Drupal Association
Quick Linked Data Intro
Quick Linked Data Intro
Published: 2008/07/07
Channel: Michael Hausenblas
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
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In computing, linked data (often capitalized as Linked Data) is a method of publishing structured data so that it can be interlinked and become more useful through semantic queries. It builds upon standard Web technologies such as HTTP, RDF and URIs, but rather than using them to serve web pages for human readers, it extends them to share information in a way that can be read automatically by computers. This enables data from different sources to be connected and queried.[1]

Tim Berners-Lee, director of the World Wide Web Consortium (W3C), coined the term in a 2006 design note about the Semantic Web project.[2]

Principles[edit]

Tim Berners-Lee outlined four principles of linked data in his "Linked Data" note of 2006,[2] paraphrased along the following lines:

  1. Use URIs to name (identify) things.
  2. Use HTTP URIs so that these things can be looked up (interpreted, "dereferenced").
  3. Provide useful information about what a name identifies when it's looked up, using open standards such as RDF, SPARQL, etc.
  4. Refer to other things using their HTTP URI-based names when publishing data on the Web.

Tim Berners-Lee gave a presentation on linked data at the TED 2009 conference.[3] In it, he restated the linked data principles as three "extremely simple" rules:

  1. All kinds of conceptual things, they have names now that start with HTTP.
  2. If I take one of these HTTP names and I look it up...I will get back some data in a standard format which is kind of useful data that somebody might like to know about that thing, about that event.
  3. When I get back that information it's not just got somebody's height and weight and when they were born, it's got relationships. And when it has relationships, whenever it expresses a relationship then the other thing that it's related to is given one of those names that starts with HTTP.

Components[edit]

Linked open data[edit]

Linked open data is linked data that is open content.[4][5][6] Tim Berners-Lee gives the clearest definition of linked open data in differentiation with linked data.

Linked Open Data (LOD) is Linked Data which is released under an open licence, which does not impede its reuse for free.

— Tim Berners-Lee, Linked Data[2][7]

Large linked open data sets include DBpedia and Freebase (now Wikidata).

History[edit]

The term "linked open data" has been in use since at least February 2007, when the "Linking Open Data" mailing list[8] was created.[9] The mailing list was initially hosted by the SIMILE project[10] at the Massachusetts Institute of Technology.

Linking Open Data community project[edit]

The above diagram shows which Linking Open Data datasets are connected, as of August 2014. This was produced by the Linked Open Data Cloud project, which was started in 2007. Some sets may include copyrighted data which is freely available.[11]

The goal of the W3C Semantic Web Education and Outreach group's Linking Open Data community project is to extend the Web with a data commons by publishing various open datasets as RDF on the Web and by setting RDF links between data items from different data sources. In October 2007, datasets consisted of over two billion RDF triples, which were interlinked by over two million RDF links.[12][13] By September 2011 this had grown to 31 billion RDF triples, interlinked by around 504 million RDF links. A detailed statistical breakdown was published in 2014.[14]

European Union projects[edit]

There are a number of European Union projects[when defined as?] involving linked data. These include the linked open data around the clock (LATC) project,[15] the PlanetData project,[16] the DaPaaS (Data-and-Platform-as-a-Service) project,[17] and the Linked Open Data 2 (LOD2) project.[18][19][20] Data linking is one of the main goals of the EU Open Data Portal, which makes available thousands of datasets for anyone to reuse and link.

Datasets[edit]

  • DBpedia – a dataset containing extracted data from Wikipedia; it contains about 3.4 million concepts described by 1 billion triples, including abstracts in 11 different languages
  • FOAF – a dataset describing persons, their properties and relationships
  • GeoNames provides RDF descriptions of more than 7,500,000 geographical features worldwide.
  • UMBEL – a lightweight reference structure of 20,000 subject concept classes and their relationships derived from OpenCyc, which can act as binding classes to external data; also has links to 1.5 million named entities from DBpedia and YAGO
  • Wikidata – a collaboratively-created linked dataset that acts as central storage for the structured data of its Wikimedia Foundation sister projects

Dataset instance and class relationships[edit]

Clickable diagrams that show the individual datasets and their relationships within the DBpedia-spawned LOD cloud (as shown by the figures to the right) are available.[21][22]

See also[edit]

References[edit]

  1. ^ Bizer, Christian; Heath, Tom; Berners-Lee, Tim (2009). "Linked Data—The Story So Far" (PDF). International Journal on Semantic Web and Information Systems. 5 (3): 1–22. ISSN 1552-6283. doi:10.4018/jswis.2009081901. Retrieved 2010-12-18.  Solving Semantic Interoperability Conflicts in Cross–Border E–Government Services.
  2. ^ a b c Tim Berners-Lee (2006-07-27). "Linked Data". Design Issues. W3C. Retrieved 2010-12-18. 
  3. ^ "Tim Berners-Lee on the next Web". 
  4. ^ "Frequently Asked Questions (FAQs) - Linked Data - Connect Distributed Data across the Web". 
  5. ^ "COAR » 7 things you should know about…Linked Data". 
  6. ^ "Linked Data Basics for Techies". 
  7. ^ "5 Star Open Data". 
  8. ^ "public-lod@w3.org Mail Archives". 
  9. ^ "SweoIG/TaskForces/CommunityProjects/LinkingOpenData/NewsArchive". 
  10. ^ "SIMILE Project - Mailing Lists". 
  11. ^ Linking open data cloud diagram 2014, by Max Schmachtenberg, Christian Bizer, Anja Jentzsch and Richard Cyganiak. http://lod-cloud.net/
  12. ^ Linking Open Data
  13. ^ Fensel, Dieter; Facca, Federico Michele; Simperl, Elena; Ioan, Toma (2011). Semantic Web Services. Springer. p. 99. ISBN 3642191924. 
  14. ^ http://linkeddatacatalog.dws.informatik.uni-mannheim.de/state/
  15. ^ Linked open data around the clock (LATC)
  16. ^ PlanetData
  17. ^ DaPaaS
  18. ^ Linking Open Data 2 (LOD2)
  19. ^ "CORDIS FP7 ICT Projects – LOD2". European Commission. 2010-04-20. 
  20. ^ "LOD2 Project Fact Sheet – Project Summary" (PDF). 2010-09-01. Archived from the original (PDF) on 2011-07-20. Retrieved 2010-12-18. 
  21. ^ Instance relationships amongst datasets
  22. ^ Class relationships amongst datasets

Further reading[edit]

External links[edit]

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