Difference between revisions of "6CC001 Workshop - week 09"

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[[Main Page]] >> [[Web Application Development]] >> [[Web Application Developpment - Workbook|Workbook]] >> Week 09
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[[Main Page]] >> [[6CC001|Advanced Web Technologies]] >> [[6CC001 - Workbook|Workbook]] >> Week 09
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Let's create an RDF file that specifies that:
 +
 
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* [http://en.wikipedia.org/wiki/Watchmen This page] is called “Watchmen” and is about comics
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* [http://en.wikipedia.org/wiki/Sin_city This page] is called “Sin City” and is about comics
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* [http://en.wikipedia.org/wiki/Maus This page] is called “Maus” and is about comics
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* [http://en.wikipedia.org/wiki/Nineteen_Eighty-Four This page] is called “1984” and is about books
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* [http://en.wikipedia.org/wiki/Never_Let_Me_Go This page] is called “Never le me go” and is about books
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* [http://en.wikipedia.org/wiki/Ender%27s_game This page] is called “Ender’s game” and is about books
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Here is the code:
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<pre>
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<rdf:RDF
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  xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
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  xmlns:dc="http://purl.org/dc/elements/1.1/">
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      <rdf:Description rdf:about="http://en.wikipedia.org/wiki/Watchmen">
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          <dc:title>Watchmen</dc:title>
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          <dc:subject>Comics</dc:subject>
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      </rdf:Description>
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      <rdf:Description rdf:about="http://en.wikipedia.org/wiki/Sin_city">
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          <dc:title>Sin City</dc:title>
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          <dc:subject>Comics</dc:subject>
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      </rdf:Description>
 +
     
 +
      <rdf:Description rdf:about="http://en.wikipedia.org/wiki/Maus">
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          <dc:title>Maus</dc:title>
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          <dc:subject>Comics</dc:subject>
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      </rdf:Description>
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      <rdf:Description rdf:about="http://en.wikipedia.org/wiki/Nineteen_Eighty-Four">
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          <dc:title>1984</dc:title>
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          <dc:subject>Books</dc:subject>
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      </rdf:Description>
 +
     
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      <rdf:Description rdf:about="http://en.wikipedia.org/wiki/Never_Let_Me_Go">
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          <dc:title>Never let me go</dc:title>
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          <dc:subject>Books</dc:subject>
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      </rdf:Description>
 +
     
 +
      <rdf:Description rdf:about="http://en.wikipedia.org/wiki/Ender%27s_game">
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          <dc:title>Ender's game</dc:title>
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          <dc:subject>Books</dc:subject>
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      </rdf:Description>             
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</rdf:RDF>
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</pre>
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Using SPARQL, I can easily ask for all the pages that are on the subject of “comics”:
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<pre>
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SELECT ?x
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FROM <http://mi-linux.wlv.ac.uk/~in9352/rdf/comics.rdf>
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WHERE { ?x  <http://purl.org/dc/elements/1.1/subject>  "Comics" }
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</pre>
 +
 
 +
Let’s test our query with this free SPARQL processor:
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* [http://sparql.org/sparql.html http://sparql.org/sparql.html]
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These 3 pages are definitely on the topic of “comics” => better than Google’s keyword matching algorithm!
 +
 
 +
[[Image: Sparql.gif]]

Latest revision as of 16:16, 27 January 2011

Main Page >> Advanced Web Technologies >> Workbook >> Week 09

Let's create an RDF file that specifies that:

  • This page is called “Watchmen” and is about comics
  • This page is called “Sin City” and is about comics
  • This page is called “Maus” and is about comics
  • This page is called “1984” and is about books
  • This page is called “Never le me go” and is about books
  • This page is called “Ender’s game” and is about books

Here is the code: 

<rdf:RDF
  xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
  xmlns:dc="http://purl.org/dc/elements/1.1/">
  
      <rdf:Description rdf:about="http://en.wikipedia.org/wiki/Watchmen">
          <dc:title>Watchmen</dc:title>
          <dc:subject>Comics</dc:subject>
      </rdf:Description>
      
      <rdf:Description rdf:about="http://en.wikipedia.org/wiki/Sin_city">
          <dc:title>Sin City</dc:title>
          <dc:subject>Comics</dc:subject>
      </rdf:Description>
      
      <rdf:Description rdf:about="http://en.wikipedia.org/wiki/Maus">
          <dc:title>Maus</dc:title>
          <dc:subject>Comics</dc:subject>
      </rdf:Description>
              
      <rdf:Description rdf:about="http://en.wikipedia.org/wiki/Nineteen_Eighty-Four">
          <dc:title>1984</dc:title>
          <dc:subject>Books</dc:subject>
      </rdf:Description>
      
      <rdf:Description rdf:about="http://en.wikipedia.org/wiki/Never_Let_Me_Go">
          <dc:title>Never let me go</dc:title>
          <dc:subject>Books</dc:subject>
      </rdf:Description>
      
      <rdf:Description rdf:about="http://en.wikipedia.org/wiki/Ender%27s_game">
          <dc:title>Ender's game</dc:title>
          <dc:subject>Books</dc:subject>
      </rdf:Description>              
                  
</rdf:RDF>

Using SPARQL, I can easily ask for all the pages that are on the subject of “comics”: 

SELECT ?x
FROM <http://mi-linux.wlv.ac.uk/~in9352/rdf/comics.rdf>
WHERE { ?x  <http://purl.org/dc/elements/1.1/subject>  "Comics" }

Let’s test our query with this free SPARQL processor:

These 3 pages are definitely on the topic of “comics” => better than Google’s keyword matching algorithm!

Sparql.gif

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