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Linked Data: so what?

Linked Data: so what?



Linked Data description

Linked Data description



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Linked Data: so what? Linked Data: so what? Presentation Transcript

  • Linked Data : and so what?
  • semantics is the study of meaning, as inherent at the levels of words, phrases, sentences http://en.wikipedia.org/wiki/Semantics
  • the Semantic Web is a web of data.. like a global database http://www.w3.org/DesignIssues/Semantic.html
  • first step is putting data on the Web in a form that machines can naturally understand... This creates what I call Semantic Web - a web of data that can naturally processed directly or indirectly by machines Sir Tim Berners-Lee, Weaving the Web, Harper San Francisco,1999
  • The term Linked Data refers to a set of best practices for publishing and connecting strucutured data on the Web. The Semantic Web is the goal or end result... Linked Data provides the means to reach that goal. from Linked Data: The Story So Far, Sir T. Berners-Lee 2009
  • Web of Linked Data - designed for machine first - primarily links data about Things, not documents - is for humans in the end
  • Haven’t we been putting data on the web? Yes, in CSV, relational database, XML... But these approaches are not so easy to integrate! And mapping is no solution for a distribuited Web of Data Actually it is about a data (RDF) and a naming (URI) model on the Web
  • Linked data applications operate on top of unbound, global data space.
  • What’s happening?
  • Technically...
  • Linked Data is a way of publishing data on the Web that: - encourages reuse - reduces redundancy - maximises inter-connectdness - enables network effects
  • So, how is this achieved?
  • - Use URIs as names for things - Use HTTP URIs so that everyone can look up those names - Provide useful information, by a URI, using standards RDF, SPARQL - Include links to other URIs discovering more things
  • Publishing Linked Data - RDFizers convert data format into RDF - D2R Server creates linked data from relational databases - Sparq extracts linked data
  • Linked Data Browsers navigate between data sources - Marbles - Tabulator - Disco
  • - merges data about the same things from different sources - follows specific predicates found in retrived data such as owl:sameAs and rdfs:seeAlso in order to gain more information about a resource and to obtain human-friendly resource labels http://marbles.sourceforge.net/
  • Linked Data Search Engines - for Apps: Sindice, Swoogle - for humans: Falcons, SWSE
  • provides API that other linked data apps can use http://sindice.com/
  • The Semantic Web isn't just about putting data on the web. It is about making links, so that a person or machine can explore the web of data.   With linked data, when you have some of it, you can find other, related, data....
  • If someone has the URI of that thing, what relationships to what other objects is it useful to know about? Linked data is essential to actually connect the semantic web.  It is quite easy to do with a little thought, and becomes second nature.   Various common sense considerations determine when to make a link and when not to. Tim Berners-Lee Date: 2006-07-27, last change: $Date: 2009/06/18 18:24:33 $ Status: personal view only. Editing status: imperfect but published http://www.w3.org/DesignIssues/LinkedData.html
  • thanks! http://titticimmino.com tc@titticimmino.com