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The Semantic Web
The Semantic Web
The Semantic Web
The Semantic Web
The Semantic Web
The Semantic Web
The Semantic Web
The Semantic Web
The Semantic Web
The Semantic Web
The Semantic Web
The Semantic Web
The Semantic Web
The Semantic Web
The Semantic Web
The Semantic Web
The Semantic Web
The Semantic Web
The Semantic Web
The Semantic Web
The Semantic Web
The Semantic Web
The Semantic Web
The Semantic Web
The Semantic Web
The Semantic Web
The Semantic Web
The Semantic Web
The Semantic Web
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The Semantic Web

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The Semantic Web

The Semantic Web

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  • 1. The Semantic Web An introduction
  • 2. <ul><li>In linguistics , semantics is … devoted to the study of meaning … on the syntactic levels of words, phrases, sentences </li></ul><ul><li>http:// en.wikipedia.org/wiki/Semantic </li></ul>
  • 3. Title Author Publisher Genre Price
  • 4. <ul><li>“ The Semantic Web is a web of data , in some ways like a global database” 1 </li></ul><ul><li>“ first step is putting data on the Web in a form that machines can naturally understand, or converting it to that form.  This creates what I call a Semantic Web-a web of data that can be processed directly or indirectly by machines” 2 </li></ul><ul><li>1. http://www.w3.org/DesignIssues/Semantic.html </li></ul><ul><li>2. Tim Berners-Lee, Weaving the Web . Harper, San Francisco. 1999. </li></ul>
  • 5.  
  • 6. <ul><li><h1>Library Management Team</h1> </li></ul><ul><li><h2>Director of Library Services</h2> </li></ul><ul><li><p>Deborah Shorley - Director of Library Services<br /> </li></ul><ul><li><a href=&quot;mailto:d.shorley@imperial.ac.uk&quot;>d.shorley@imperial.ac.uk</a><br /> </li></ul><ul><li>Telephone: +44 (0)20 7594 8881</p> </li></ul><ul><li><h2>Assistant directors</h2> </li></ul><ul><li><h3>Assistant Director: Administration and Planning</h3> </li></ul><ul><li><p>Susan Howard<br /> </li></ul><ul><li><a href=&quot;mailto:s.howard@imperial.ac.uk&quot;>s.howard@imperial.ac.uk</a><br /> </li></ul><ul><li>Telephone: +44 (0)20 7594 8622<br /> </li></ul><ul><li><a href=&quot;http://www.imperial.ac.uk/people/s.howard&quot;> </li></ul><ul><li>www.imperial.ac.uk/people/s.howard</a></p> </li></ul><ul><li><h3>Assistant Director: E-Strategy and Information Resources</h3> </li></ul><ul><li><p>Owen Stephens<br /> </li></ul><ul><li><a href=&quot;mailto:o.stephens@imperial.ac.uk&quot;>o.stephens@imperial.ac.uk</a><br /> </li></ul><ul><li>Telephone: +44 (0)20 7594 8829<br /> </li></ul><ul><li><a href=&quot;http://www.imperial.ac.uk/people/o.stephens&quot;> </li></ul><ul><li>www.imperial.ac.uk/people/o.stephens</a></p> </li></ul><ul><li><h3>Assistant Director: Faculty Support Services for Learning and Research</h3> </li></ul><ul><li><p>Liz Davis<br /> </li></ul><ul><li><a href=&quot;mailto:e.davis@imperial.ac.uk&quot;>e.davis@imperial.ac.uk</a><br /> </li></ul><ul><li>Telephone: +44 (0)20 7594 8877<br /> </li></ul><ul><li><a href=&quot;http://www.imperial.ac.uk/people/e.davis&quot;> </li></ul><ul><li>www.imperial.ac.uk/people/e.davis</a></p> </li></ul>
  • 7.  
  • 8. How do we get a semantic web? <ul><li>Slowly! </li></ul><ul><li>Applications getting better at understanding human semantics (‘Top Down’) </li></ul><ul><li>More structured formats are gaining wider use (‘Bottom Up’) </li></ul><ul><li>More database driven sites, so less need for humans to understand it all </li></ul><ul><li>‘Semantic web’ applications appearing </li></ul>
  • 9. Top Down <ul><li>Depends of ‘more intelligent’ computers </li></ul><ul><ul><li>Google Book Search </li></ul></ul><ul><ul><li>LibX Toolbar </li></ul></ul><ul><li>http://www.readwriteweb.com/archives/semantic_web_difficulties_with_classic_approach.php </li></ul>
  • 10.  
  • 11.  
  • 12. Bottom Up <ul><li>Depends on more structured data using agreed standards </li></ul><ul><ul><li>URIs </li></ul></ul><ul><ul><li>RDF </li></ul></ul><ul><ul><li>OWL </li></ul></ul><ul><li>Many sceptics </li></ul><ul><ul><li>http://www.readwriteweb.com/archives/semantic_web_difficulties_with_classic_approach.php </li></ul></ul>
  • 13. URI <ul><li>Uniform Resource Identifier </li></ul><ul><ul><li>“a simple and extensible means for identifying a resource” </li></ul></ul><ul><ul><li>A URL is a type of URI </li></ul></ul>
  • 14. What is RDF? <ul><li>Resource Description Framework </li></ul><ul><ul><li>“ a language for representing information about resources in the World Wide Web” </li></ul></ul><ul><ul><li>“ RDF can also be used to represent information about things that can be identified on the Web, even when they cannot be directly retrieved on the Web” </li></ul></ul><ul><ul><li>Uses URIs or Literals </li></ul></ul><ul><li>http://www.w3.org/TR/REC-rdf-syntax/ </li></ul>
  • 15. <ul><li>Jane Eyre </li></ul><ul><li>has a </li></ul><ul><li>creator </li></ul><ul><li> whose name is </li></ul><ul><li>Charlotte Bronte </li></ul>Subject Predicate Object
  • 16. <ul><li>Jane Eyre </li></ul><ul><li>has a </li></ul><ul><li>creator </li></ul><ul><li> whose name is </li></ul><ul><li>Charlotte Bronte </li></ul>Subject Predicate Object http://purl.org/dc/elements/1.1/creator http://www.gutenberg.org/files/1260/1260-h/1260-h.htm Charlotte Bronte
  • 17.  
  • 18. Jane Eyre Charlotte Bronte Penguin Book is a has creator has publisher Person is a
  • 19. RDF Schemas <ul><li>Define vocabularies for a community </li></ul><ul><ul><li>Define a class of objects ‘Books’ </li></ul></ul><ul><ul><li>Define a property ‘Creator’ </li></ul></ul>
  • 20. OWL (Web Ontology Language) <ul><li>When a Schema just isn’t enough! </li></ul><ul><li>Allows you to put limits of relationships </li></ul><ul><ul><li>a Person has one and only one biological mother </li></ul></ul><ul><li>Allows you to say ‘this is the same as that’ </li></ul><ul><ul><li>This thing that I call a ‘Car’ is the same as that thing that you call an ‘Automobile’ </li></ul></ul>
  • 21.  
  • 22. <ul><li>Data: </li></ul><ul><li>< http://www.gutenberg.org/files/1260/1260-h/1260-h.htm > <http://purl.org/dc/elements/1.1/title> “Jane Eyre&quot; </li></ul><ul><li>Query: </li></ul><ul><li>SELECT ?title WHERE {< http://www.gutenberg.org/files/1260/1260-h/1260-h.htm > <http://purl.org/dc/elements/1.1/title> ?title . } </li></ul><ul><li>Result: </li></ul><ul><li>“ Jane Eyre” </li></ul>
  • 23. Some actual applications! <ul><li>Cinespin (Freebase) </li></ul><ul><li>Nugget, Cenote (Talis) </li></ul><ul><li>RDA, DCMI, FRBR, FRAD etc. </li></ul>
  • 24. RDA <ul><li>Resource Description and Access </li></ul><ul><li>New standard for resource description and access designed for the digital world – building on AACR2 </li></ul><ul><li>Uses FRBR and FRAD concepts </li></ul><ul><li>http:// www.collectionscanada.gc.ca/jsc/rda.html </li></ul>
  • 25. DCMI <ul><li>Dublin Core Metadata Initiative </li></ul><ul><li>An open organization engaged in the development of interoperable online metadata standards that support a broad range of purposes and business models </li></ul><ul><li>http:// dublincore.org / </li></ul>
  • 26. RDA and DCMI <ul><li>The participants recommend that the RDA Committee of Principals and DCMI seek funding for work to develop an RDA Application Profile -- specifically that the following activities be undertaken: </li></ul><ul><li>development of an RDA Element Vocabulary </li></ul><ul><li>development of an RDA DC Application Profile based on FRBR and FRAD </li></ul><ul><li>disclosure of RDA Value Vocabularies using RDF/RDFS/SKOS </li></ul>
  • 27. RDA and DCMI <ul><li>Outcomes: </li></ul><ul><li>The benefits of this activity will be that: </li></ul><ul><li>the library community gets a metadata standard that is compatible with the Web Architecture and that is fully interoperable with other Semantic Web initiatives </li></ul><ul><li>the DCMI community gets a libraries application profile firmly based on the DCAM and FRBR (which will be a high profile exemplar for others to follow) </li></ul><ul><li>the Semantic Web community get a significant pool of well thought-out metadata terms to re-use </li></ul><ul><li>there is wider uptake of RDA </li></ul><ul><li>http:// www.bl.uk/services/bibliographic/meeting.html </li></ul>
  • 28. RDF for Bib Metadata <ul><li>http://vocab.org/frbr/core </li></ul><ul><li>http://cidoc.ics.forth.gr/frbr_drafts.html </li></ul><ul><li>http:// myee.bol.ucla.edu/rdfmodelintro.html </li></ul>
  • 29. Acknowledgments <ul><li>Jane Eyre </li></ul><ul><ul><li>http:// www.flickr.com/photos/andthenpatterns / </li></ul></ul><ul><li>Sad Computer </li></ul><ul><ul><li>http://www.flickr.com/photos/loririelly/ </li></ul></ul><ul><li>Power of Three </li></ul><ul><ul><li>http:// www.flickr.com/photos/hale_popoki </li></ul></ul>

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