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Grddl In A Nutshell V1

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    Grddl In A Nutshell V1 - Presentation Transcript

    1. GRDDL in a nutshell fabien, gandon, inria
    2. I want my data back
      • from my web pages.
    3. many data
      • in my web page
    4. I want your data back
      • from your web pages.
    5. many data
      • in many web pages
    6. open your data
      • to anyone who might use it
      W3C ©
    7. deep web in particular…
    8. many dialects
      • of XML are in use
      <ccxml version=&quot;1.0&quot; xmlns=&quot;http://www.w3.org/2002/09/ccxml&quot;> <eventprocessor> <transition event=&quot;connection.alerting&quot; name=&quot;evt&quot;> <log expr=&quot;'The number called is' + evt.connection.remote + '.'&quot;/> <if cond=&quot;evt.connection.remote == 'tel:+18315551234'&quot;> <log expr=&quot;'Go away! we do not want to answer the phone.'&quot;/> <reject/> <else/> <log expr=&quot;'We like you! We are going to answer the call.'&quot;/> <accept/> </if> </transition> <transition event=&quot;connection.connected&quot;> <log expr=&quot;'Call was answered,Time to disconnect it.'&quot;/> <disconnect/> </transition> <transition event=&quot;connection.disconnected&quot;> <log expr=&quot;'Call has been disconnected. Ending CCXML Session.'&quot;/> <exit/> </transition> </eventprocessor> </ccxml>
        • <mroot>
        • <mrow>
        • <mn>1</mn>
        • <mo>-</mo>
        • <mfrac>
        • <mi>x</mi>
        • <mn>2</mn>
        • </mfrac>
        • </mrow>
        • <mn>3</mn>
        • </mroot>
      <users> <person login=&quot;fgandon&quot; uid=&quot;19536&quot;> <home>/net/user/fg</home> <pref>/sys/19536.inf</pref> <access_level>8</access_level> </person> <person login=&quot;fgandon&quot; uid=&quot;19536&quot;> <home>/net/user/fg</home> <pref>/sys/19536.inf</pref> <access_level>8</access_level> </person> </users> <p:pipeline name=&quot;fig2&quot; xmlns:p=&quot;http://example.org/PipelineNamespace&quot;> <p:input port=&quot;doc&quot; sequence=&quot;no&quot;/> <p:output port=&quot;out&quot; step=&quot;xform&quot; source=&quot;result&quot;/> <p:choose name=&quot;vcheck&quot; step=&quot;fig2&quot; source=&quot;doc&quot;> <p:when test=&quot;/*[@version &lt; 2.0]&quot;> <p:output name=&quot;valid&quot; step=&quot;val1&quot; source=&quot;result&quot;/> <p:step type=&quot;p:validate&quot; name=&quot;val1&quot;> <p:input port=&quot;document&quot; step=&quot;fig2&quot; source=&quot;doc&quot;/> <p:input port=&quot;schema&quot; href=&quot;v1schema.xsd&quot;/> </p:step> </p:when> <p:otherwise> <p:output name=&quot;valid&quot; step=&quot;val2&quot; source=&quot;result&quot;/> <p:step type=&quot;p:validate&quot; name=&quot;val2&quot;> <p:input port=&quot;document&quot; step=&quot;fig2&quot; source=&quot;doc&quot;/> <p:input port=&quot;schema&quot; href=&quot;v2schema.xsd&quot;/> </p:step> </p:otherwise> </p:choose> <p:step type=&quot;p:xslt&quot; name=&quot;xform&quot;> <p:input port=&quot;document&quot; step=&quot;vcheck&quot; source=&quot;valid&quot;/> <p:input port=&quot;stylesheet&quot; href=&quot;stylesheet.xsl&quot;/> </p:step> </p:pipeline>
        • <HTML> <HEAD>
        • <TITLE>title</TITLE>
        • <LINK REL=STYLESHEET TYPE=&quot;text/css&quot; HREF=&quot;http://style.com/cool&quot; TITLE=&quot;Cool&quot;>
        • </HEAD>
        • <BODY>
        • <H1>Headline is blue</H1>
        • <P STYLE=&quot;color: green&quot;>While the paragraph is green.
        • </BODY>
        • </HTML>
    9. resources
      • many ways to weave data with the web
    10. embedding explicit
      • several initiatives to make data
    11. your data
      • GRRDL = an easy way to open
    12. XML data
      • GRRDL = an easy way to extract RDF from
      http://www.flickr.com/photos/cho45/1402634073/
    13. imagine…
    14. guitar,
      • Stephan wishes to buy a
    15. reviews,
      • he visits a site offering
    16. reviews & profiles
      • he uses GRDDL to aggregate
    17. GRDDL at work
    18. GRDDL step 1 declare a document is a source
    19. GRDDL step 2 link it to one or more extractors
    20. GRDDL step 3 let GRDDL agents extract RDF from the document
    21. generic profile
      • declare an XHTML document is a source
      <head profile=&quot;http://www.w3.org/2003/g/data-view&quot; > <title>The man who mistook his wife for a hat</title> <link rel=&quot;transformation&quot;  href=&quot;http://www.w3.org/2000/06/ dc-extract/dc-extract.xsl&quot; /> <meta name=&quot;DC.Subject&quot; content=&quot;clinical tales&quot; /> … </head>
    22. transformation
      • link an XHTML document to a
      <head profile=&quot;http://www.w3.org/2003/g/data-view&quot;> <title>The man who mistook his wife for a hat</title> < link rel=&quot;transformation&quot;  href=&quot;http://www.w3.org/2000/06/ dc-extract/dc-extract.xsl&quot; /> <meta name=&quot;DC.Subject&quot; content=&quot;clinical tales&quot; /> … </head>
    23. GRDDL agent
      • what is extracted by a standard
      <head profile=&quot;http://www.w3.org/2003/g/data-view&quot;> <title> The man who mistook his wife for a hat </title> <link rel=&quot;transformation&quot;  href=&quot;http://www.w3.org/2000/06/ dc-extract/dc-extract.xsl&quot; /> < meta name=&quot;DC.Subject&quot; content=&quot;clinical tales&quot; /> … </head> # dc:title &quot;The man who mistook his wife for a hat&quot;  # dc:subject &quot;clinical tales&quot;
    24. custom profile declare a source and a transformation at once
    25. custom profile
      • no transformation, just reference the
      <head profile=&quot;http://purl.org/NET/erdf/profile&quot; > <title>Fabien’s agenda</title> (…) </head>
    26. transformation
      • profile document = GRDDL source giving the
      <html xmlns=&quot;http://www.w3.org/1999/xhtml&quot;> <head profile=&quot;http://www.w3.org/2003/g/data-view&quot; > <link rel=&quot;transformation&quot; href=&quot; http://www.w3.org/2003/g/glean-profile &quot; /> </head> <body> <p> <a rel=&quot;profileTransformation&quot; href=&quot;http://purl.org/NET/erdf/extract-rdf&quot;>GRDDL transform</a> </p> </body> </html>
    27. XML document declare a source and a transformation for an
    28. generic profile
      • declare an XML document is a source
      <book xmlns=&quot;http://example.org/book/&quot; xmlns:grddl=&quot;http://www.w3.org/2003/g/data-view#&quot; grddl:transformation=&quot; http://example.org/book/getAuthor.xsl &quot; > <title>The man who mistook his wife for a hat</title> … </book>
    29. transformation
      • link an XML document to a
      <book xmlns=&quot;http://example.org/book/&quot; xmlns:grddl=&quot;http://www.w3.org/2003/g/data-view#&quot; grddl:transformation=&quot; http://example.org/book/getAuthor.xsl &quot; > <title>The man who mistook his wife for a hat</title> … </book>
    30. message
      • take away
    31. Don't bury your data in some HTML page or XML document
    32. data… when you publish a document that contains
    33. do reference GRDDL profiles and/or transformations
    34. fabien, gandon

    + Fabien GandonFabien Gandon, 2 years ago

    custom

    2308 views, 6 favs, 1 embeds more stats

    Takahashi style tutorial on GRDDL (version 1)

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