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Design and Implementation of Component-based Adaptive Web Presentations

Design and Implementation of Component-based Adaptive Web Presentations. Zoltán Fiala , Michael Hinz Technische Universität Dresden Geert-Jan Houben, Flavius Frasincar Technische Universiteit Eindhoven {zoltan.fiala, mh5}@inf.tu-dresden.de {g.j.houben, f.frasincar}@tue.nl.

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Design and Implementation of Component-based Adaptive Web Presentations

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  1. Design and Implementation of Component-based Adaptive Web Presentations Zoltán Fiala, Michael Hinz Technische Universität Dresden Geert-Jan Houben, Flavius Frasincar Technische Universiteit Eindhoven {zoltan.fiala, mh5}@inf.tu-dresden.de {g.j.houben, f.frasincar}@tue.nl SAC 2004 WTA, March 14-17 2004, Nicosia

  2. Structure • Motivation • A Component-based Document Format • Hera-based Development • Implementation SAC2004 WTA, March 14-17 2004, NicosiaZoltán Fiala

  3. Motivation • Today‘s WWW • Personalized ubiquitous medium → Delivery of adapted information needed • Conventional document formats hardly applicable for this challenge • Complex authoring process • AMACONT project [1] • Component-based Development of Adaptive Web Presentations • Composing Web applications from reusable, adaptable document components • Hera project [2] • Structured design methodology for adaptive Web applications • Model driven specification framework based on RDF(S) • Here: Putting it all together • Combining Hera’s modeling power with a flexible AMACONT implementation • Extending Hera with AMACONT’s versatile presentation layer • Automatic transformation from Hera specs. to AMACONT components SAC2004 WTA, March 14-17 2004, NicosiaZoltán Fiala

  4. A Component-based Document Format • Based on different abstraction levels SAC2004 WTA, March 14-17 2004, NicosiaZoltán Fiala

  5. Describing Adaptive Behavior SAC2004 WTA, March 14-17 2004, NicosiaZoltán Fiala

  6. Describing Adaptive Layout „Layout Managers“ • BorderLayout • BoxLayout • OverlayLayout • GridLayout • Transformers for • xHTML • cHTML • WML Box-Layout <LayoutProperties> <alay:LayoutManager> <alay:BoxLayout orientation="yAxis"> <alay:ComponentRef ratio="30%"> PictureObject1 </alay:ComponentRef> <alay:ComponentRef ratio="70%"> TextObject1 </alay:ComponentRef> </alay:BoxLayout> </alay:LayoutManager> </LayoutProperties> SAC2004 WTA, March 14-17 2004, NicosiaZoltán Fiala

  7. Hera-based Development • Hypermedia Design Models • Identify Crucial phases of Web development • Specify hypermedia applications in an appropriate level of abstraction • Already significant research on design and process models • Aspects of adaptation: Hera [2], OOHDM [3], UWE [4] • Idea • Adoption of existing methods for component-based adaptive Web applications • Focus: Model driven Hera methodology [2] • Benefits • Automatic translation of Hera schemas to a component-based AMACONT implementation • Versatile implementation (presentation) layer for Hera framework SAC2004 WTA, March 14-17 2004, NicosiaZoltán Fiala

  8. Conceptual Design • Conceptual Model (CM) • Represents the application domain by concepts and concept attributes • Typed concept attributes (Integer, String, Image, Audio, etc.) • Based on RDFS • Component Development • Creation/retrieval of media instances representing concept attributes • Encapsulating media instances to components • Additional metadata, MPEG7 descriptors • Providing alternative media instances with different quality SAC2004 WTA, March 14-17 2004, NicosiaZoltán Fiala

  9. Application Design • Application Model • Logical, structural and navigationalaspects • Grouping concept attributes to Slices • Slice: meaningful presentation unitof some media items • Adaptation Design • Targeting different adaptation aspects in the AM • Adjusting the coarse navigational structure • Population of slices with media items • Dynamic Adaptation • Assigning appearance conditions to slice references SAC2004 WTA, March 14-17 2004, NicosiaZoltán Fiala

  10. Application Design • Realization with AMACONT components • Analogies between Hera slices and components: • Meaningful presentation units bearing some semantic role • Both top-level slices and top-level document components correspond to pages to be shown on the user’s display • Contain adaptation issues • Straightforward mapping process • Concept attributes → Media Components • Slices containing attributes from a single concept → Single Document Components • Slices containing concept attributes and subslices from different concepts → Composite Document Components • Same (recursive) mapping process for each aggregated subslice SAC2004 WTA, March 14-17 2004, NicosiaZoltán Fiala

  11. Presentation Design • Presentation Model (PM) • Bridges the logical level and the actual implementation • Defines how and where the identified subslices should be displayed • PD: Presentation Diagram • Idea: Adoption of Layout Manager Concept SAC2004 WTA, March 14-17 2004, NicosiaZoltán Fiala

  12. Document Generation SAC2004 WTA, March 14-17 2004, NicosiaZoltán Fiala

  13. Prototype: Component-based WIS SAC2004 WTA, March 14-17 2004, NicosiaZoltán Fiala

  14. Conclusion and Future Work • Conclusion • Construction of adaptive Web presentations from components • Combination of the model-based Hera design methodology and AMACONT’s document formats • Automatic transformation from a high-level specification to a component-based implementation • Future Work • Dynamic coupling of AMACONT and Hera • Support for presentating data being computed at run-time • Specification, acquirement and evaluation of user interactions • Realizing dynamic adptation in the joint system SAC2004 WTA, March 14-17 2004, NicosiaZoltán Fiala

  15. Literature • [1] Fiala, Z., Hinz, M., Meissner, K., Wehner, F.: A Component-based Approach for Adaptive, Dynamic Web Documents. Journal of Web Engineering, September 2003 • [2] F. Frasincar, G. J. Houben, and R. Vdovjak. Engineering Semantic Web information Systems in Hera. • Journal of Web Engineering, September 2003 • [3] D. Schwabe, G. Rossi, R. Guimaraes. Designing personalized web applications. WWW10, Hong Kong, 2001 • [4] Koch, N., Kraus, A., Hennicker, R.: The authoring process of the UML-based web engineering approach. First International Workshop on Web-Oriented Software Technology. (2001) SAC2004 WTA, March 14-17 2004, NicosiaZoltán Fiala

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