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Why RDFa?

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SergeyChernyshev
SergeyChernyshev

Why RDFa? Presentation I'm giving at SWNYC Meetup today (11/20/2008).

Technology
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Why RDFa? Sergey Chernyshev some slides from Yaron Koren’s “ Introduction to RDFa ” SWNYC Meetup November 20 th , 2008 http:// www.techpresentations.org/Why_RDFa ?
Status ,[object Object],[object Object]
How RDFa works 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.
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>
RDF / XML <?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>
Why not combine the two?
<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 rel=&quot;contact:org“ href=&quot;http://megacorp.com&quot;> MegaCorp </a> - you can contact me at <a rel=&quot;contact:email“ href=&quot;mailto:js@megacorp.com&quot;> [email_address] </a> , or by phone at <span property=”contact:tel”>(101)010-1010</span> . </p> </body> </html>
Three main keywords in RDFa <a rel =” predicate ” href=” object ”>...</a> ...defines a linked triple <span property =” predicate ”> object </span> ...defines an unlinked triple (literal) <span about =” subject ”>...</span> ...creates a subject for triples
Creating 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> . ...
Easier to produce ,[object Object],[object Object],[object Object]
Easy to use ,[object Object],[object Object],[object Object]
Links ,[object Object],[object Object],[object Object],[object Object]

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Why RDFa?

  • 1. Why RDFa? Sergey Chernyshev some slides from Yaron Koren’s “ Introduction to RDFa ” SWNYC Meetup November 20 th , 2008 http:// www.techpresentations.org/Why_RDFa ?
  • 2.
  • 3. How RDFa works 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.
  • 4. 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>
  • 5. RDF / XML <?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>
  • 6. Why not combine the two?
  • 7. <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 rel=&quot;contact:org“ href=&quot;http://megacorp.com&quot;> MegaCorp </a> - you can contact me at <a rel=&quot;contact:email“ href=&quot;mailto:js@megacorp.com&quot;> [email_address] </a> , or by phone at <span property=”contact:tel”>(101)010-1010</span> . </p> </body> </html>
  • 8. Three main keywords in RDFa <a rel =” predicate ” href=” object ”>...</a> ...defines a linked triple <span property =” predicate ”> object </span> ...defines an unlinked triple (literal) <span about =” subject ”>...</span> ...creates a subject for triples
  • 9. Creating 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> . ...
  • 10.
  • 11.
  • 12.