Gel_DASgenexp_BOSC2009

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  • 1. DAS Gen Exp : an interactive web-based DAS client with client-side rendering Bernat Gel and Xavier Messeguer Universitat Politècnica de Catalunya, UPC [email_address]
  • 2. DAS Gen Exp
    • Is a web-based interactive genomic DAS browser
    • It has direct interaction capabilities
    • Follows the “smart client – dumb server” philosophy from DAS
    • In contrast to many other web-based browsers, it uses client-side drawing to represent the genomic data
  • 3. Client-side Rendering
    • All the data is processed and rendeed on the client machine (using javascript and HTML5 canvas)
    • Increased control over the drawing process
    • Removes load from servers
    • Increases cacheability
    • Reduces response times to user commands
  • 4. Implementation
    • Client written in javascript
      • Prototype Javascript Library
      • EXT GUI toolkit
      • JSDAS
    • Small server written in perl (using Bio::Das::Lite)
      • Caching
      • SOP
  • 5. Implementation DAS Gen Exp Server DAS Source DAS Source DAS Source DAS Source HTTP + XML Cache AJAX + JSON Client Client Client
  • 6. Overview
  • 7. Overview Main Toolbar Viewer Track Container
  • 8. Overview Select an Organism
  • 9. Overview Select an Entry Point
  • 10. Overview Select Tracks
  • 11. Overview Data appears Extended info can be obtained for each feature
  • 12. Multiple Views: Zoom
  • 13. Multiple Views: Positions
  • 14. Customization
  • 15. Customization
  • 16. Customization
  • 17. DAS Sources
  • 18. DAS Sources
  • 19. DAS Sources JSDAS
  • 20. DAS Sources
  • 21. Sessions
  • 22. Sessions
  • 23. Future Work
    • Make DAS Gen Exp a real DAS browser
      • Fully compliant with DAS stylesheets
      • Integration with the registry
    • Speed-up the server side
    • Data filters and exportation
    • Test the DAS writeback
  • 24. Thanks