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Introduction to RDFa

Slides for RDFa introduction given by Yaron Koren at New York Semantic Web Code Camp 1 - http://www.techpresentations.org/New_York_Semantic_Web_Code_Camp_(June_2008_New_York_SemWeb_Meetup)

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Introduction to RDFa

  1. 1. RDFa <ul><li>A proposed semantic data format – not yet a standard </li></ul><ul><li>First proposed in 2004 </li></ul>
  2. 2. Web page Joe Semantic's personal information I work as a programmer at MegaCorp - you can contact me at [email_address] , or by phone at (101)010-1010.
  3. 3. HTML source <html> <head> <title>Joe Programmer's contact info</title> <base href=&quot;http://joeprogrammer.com/contact-info.html&quot; /> </head> <body> <h1>Joe Semantic's personal information</h1> <p>I work as a programmer at <a href=&quot;http://megacorp.com&quot;>MegaCorp</a> - you can contact me at <a href=&quot;mailto:js@megacorp.com&quot;>js@megacorp.com</a>, or by phone at (101)010-1010.</p> </body> </html>
  4. 4. RDF page <?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?> <rdf:RDF xmlns:contact=&quot;http://www.w3.org/2001/vcard-rdf/3.0#&quot; > <rdf:Description rdf:about= &quot;http://joesemantic.com/contact-info.html&quot; > <contact:title xml:lang=&quot;en&quot;>programmer</contact:title> <contact:org rdf:resource=&quot;http://megacorp.com&quot;/> <contact:email rdf:resource=&quot;js@megacorp.com&quot;/> <contact:tel xml:lang=&quot;en&quot;> (101)010-1010 </contact:tel> </rdf:Description> </rdf:RDF>
  5. 5. Why not combine the two?
  6. 6. <html xmlns:contact=&quot;http://www.w3.org/2001/vcard-rdf/3.0#&quot; > <head> <title>Joe Semantic's personal information</title> <base href=&quot;http://joesemantic.com/contact-info.html&quot; /> </head> <body> <h1>Joe Semantic's personal information</h1> <p>I work as a <span property=”contact:title”>programmer</span> at <a href=&quot;http://megacorp.com&quot; rel=&quot;contact:org&quot;>MegaCorp</a> - you can contact me at <a rel=&quot;contact:email&quot; href=&quot;mailto:js@megacorp.com&quot;>js@megacorp.com</a> , or by phone at <span property=”contact:tel”>(101)010-1010</span> .</p> </body> </html>
  7. 7. Three main keywords in RDFa <a href=” object ” rel =” predicate ”>...</a> ...defines a linked triple <span property =” predicate ”> object </span> ...defines an unlinked triple <span about =” subject ”>...</span> ...creates a temporary subject for triples
  8. 8. Creating temporary subjects ... I'm currently reading <span about=”urn:ISBN:0-596-00027-8”> <span property=&quot;dc:title&quot;>Programming Perl</span> by <span property=&quot;dc:creator&quot;>Larry Wall</span> </span> . ...

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Slides for RDFa introduction given by Yaron Koren at New York Semantic Web Code Camp 1 - http://www.techpresentations.org/New_York_Semantic_Web_Code_Camp_(June_2008_New_York_SemWeb_Meetup)

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