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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
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
Linked Open Data - What is it?
Linked Open Data - What is it?
Published: 2012/02/28
Channel: EuropeanaEU
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
Why Linked Data?
Why Linked Data?
Published: 2013/08/05
Channel: Ordnance Survey
Linked Data for Libraries
Linked Data for Libraries
Published: 2012/08/09
Channel: OCLCVideo
The World of Linked Open Data
The World of Linked Open Data
Published: 2015/11/10
Channel: NetworkedPlanet
Big Data: R and Linked Data Streams
Big Data: R and Linked Data Streams
Published: 2009/05/03
Channel: O'Reilly
Linked Data Services
Linked Data Services
Published: 2016/08/25
Channel: ExLibrisLtd
LOD Laundromat - Best Linked Open Data Application 2015
LOD Laundromat - Best Linked Open Data Application 2015
Published: 2015/10/05
Channel: Stichting Geonovum
Linked Data (and the Web of Data)
Linked Data (and the Web of Data)
Published: 2010/10/28
Channel: DERIGalway
Linked Data Analysis by David Bianco
Linked Data Analysis by David Bianco
Published: 2015/09/04
Channel: The Bro Platform
The Next Evolution of Data (Linked Data) & Understanding The Types of Big Data!
The Next Evolution of Data (Linked Data) & Understanding The Types of Big Data!
Published: 2017/08/17
Channel: Singularity Prosperity
The Future of Linked Data in Libraries: Assessing BIBFRAME Against Best Practices
The Future of Linked Data in Libraries: Assessing BIBFRAME Against Best Practices
Published: 2016/01/22
Channel: CNI: Coalition for Networked Information
Getting Started with the Linked Data Platform (LDP)
Getting Started with the Linked Data Platform (LDP)
Published: 2014/08/13
Channel: SemanticWeb.com
Linked Data Cataloging Workflows
Linked Data Cataloging Workflows
Published: 2017/05/17
Channel: alctsce
Linked Data for Libraries, Archives and Museums
Linked Data for Libraries, Archives and Museums
Published: 2014/06/19
Channel: FreeYourMetadata
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
Semantic Web Tutorial 14/14: Linked Data
Semantic Web Tutorial 14/14: Linked Data
Published: 2014/03/16
Channel: Noureddin Sadawi
Linked Data Signatures
Linked Data Signatures
Published: 2015/02/17
Channel: Manu Sporny
Library Linked Data in the Cloud
Library Linked Data in the Cloud
Published: 2015/06/19
Channel: OCLCResearch
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
Designing with Linked Data
Designing with Linked Data
Published: 2016/09/28
Channel: UXLx - User Experience Lisbon
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
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
Linked Data Success Story
Linked Data Success Story
Published: 2012/11/21
Channel: David Wood
Sir Tim Berners-Lee on: "Why Linked Data?"
Sir Tim Berners-Lee on: "Why Linked Data?"
Published: 2011/03/07
Channel: University of Southampton
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
MOOC Semantic Web and Linked Data: Course presentation
MOOC Semantic Web and Linked Data: Course presentation
Published: 2017/05/16
Channel: UPM
Multi-dimensional linked data exploration with Glue
Multi-dimensional linked data exploration with Glue
Published: 2016/03/30
Channel: Thomas Robitaille
Linked Data in Sweden 2017
Linked Data in Sweden 2017
Published: 2017/04/26
Channel: Semantic Web LiU
Linking Data from Different Excel Sheets and Workbooks
Linking Data from Different Excel Sheets and Workbooks
Published: 2011/03/28
Channel: ExcelFormulas
Overview of Linked Data and OSLC
Overview of Linked Data and OSLC
Published: 2012/10/02
Channel: OpenServicesDotNet
Linked Data Faceted Browser
Linked Data Faceted Browser
Published: 2017/07/06
Channel: Ali Khalili
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
FDOT Linked Data Manager
FDOT Linked Data Manager
Published: 2016/06/29
Channel: FDOT Training
ELAG 2015 I Scaling data streams with Catmandu and Linked Data Fragments
ELAG 2015 I Scaling data streams with Catmandu and Linked Data Fragments
Published: 2015/09/23
Channel: Kungliga biblioteket
Why SKOS Should Be a Focal Point of Your Linked Data Strategy
Why SKOS Should Be a Focal Point of Your Linked Data Strategy
Published: 2014/05/23
Channel: PoolParty Semantic Suite
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
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
INSPIRE and linked data
INSPIRE and linked data
Published: 2017/09/19
Channel: Inspire EU
CH06 Python and the Semantic Web: Building a Linked Data Fragment Server with Asynco and Redis
CH06 Python and the Semantic Web: Building a Linked Data Fragment Server with Asynco and Redis
Published: 2015/10/10
Channel: PyConJP
Jargon Free Linked Data
Jargon Free Linked Data
Published: 2013/06/17
Channel: David Wood
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
Linked Data at the National Library of Sweden
Linked Data at the National Library of Sweden
Published: 2012/11/23
Channel: LibraryOfCongress
Microsoft PowerPivot: Import Linked Data from Excel
Microsoft PowerPivot: Import Linked Data from Excel
Published: 2010/04/08
Channel: sqlserver
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, Life Sciences, and RDF Stores - Exploration and Demonstration
Linked Data, Life Sciences, and RDF Stores - Exploration and Demonstration
Published: 2013/01/24
Channel: AllegroGraph
Interlinking datasets on the Web of Linked Data using LIMES
Interlinking datasets on the Web of Linked Data using LIMES
Published: 2015/07/13
Channel: Enayat Rajabi
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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 license, 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. doi:10.4018/jswis.2009081901. ISSN 1552-6283. 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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