W4A Transcoding Challenge
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W4A Transcoding Challenge

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W4A Transcoding Challenge W4A Transcoding Challenge Presentation Transcript

  • The SADIe Transcoding Platform Darren Lunn, Sean Bechhofer and Simon Harper The University of Manchester School of Computer Science
  • The Web
    • Designed with a focus on presenting information in a visual manner
      • Images
      • Columned Layout
      • Chunks
    • Some knowledge is only available implicitly from how the page looks
    • Can be difficult to access for users of screen readers
  • Implicit Knowledge = Advertisement = Banner = Main Content = Menu
  • Transcoding
    • The adaptation of Web content to suit the needs of the browsing device
    • Heuristic Transcoding
      • Uses rules / patterns
      • Can adapt a large number of pages
      • Can suffer from reduced accuracy issues
    • Semantic Transcoding
      • Uses annotations
      • Accurate adaptations
      • Time Consuming As Every Page Is Annotated
  • SADIe in Action Image Advertisement Tabs Banner Main Menu Banner Headline Story Overview Main Story Story Overview Headline Main Story
  • SADIe Approach
    • The visual rendering of a Web element informs the user of its purpose
    • The CSS defines the visual rendering
    • Identifying the purpose of a CSS definition implicitly identifies the purpose of the Web element
  • Exploiting CSS cnnNavigation{ float:left; border-width:0 1px 0 0; border-style:solid; . . . } CSS <ul class=&quot;cnnNavigation&quot;> <li><a href=&quot;/&quot;>Home</a></li> <li><a href=&quot;/WORLD/&quot;>World</a></li> <li><a href=&quot;/US/&quot;>U.S.</a></li> . . . </ul> (X)HTML
  • Annotation Through Ontology Upper Ontology . . . (X)HTML (X)HTML (X)HTML . . . CSS CSS CSS . . . Website Ontology
  • CNN (Partial) Ontology
  • Transcoding Architecture SADIe Proxy Web Page Identify Ontology Query Ontology Transcode Web page User
  • Basic User Interface
  • Advanced User Interface
  • Incorporated Into Website
  • Conclusions
    • SADIe combines the benefits of both Heuristic and Semantic Transcoding
    • Annotation occurs at the CSS level using an ontology
    • One annotation propagates to all pages within the Website
    • Transcoding is achieved via a proxy
    • SADIe can be instigated via a User interface or embedded within a page
  • Questions? http://hcw.cs.manchester.ac.uk/research/sadie/ http://hcw-eprints.cs.manchester.ac.uk/23/ http://sadie.cs.manchester.ac.uk/