Hypermedia presentation generation in Hera

  • Authors:

  • Flavius Frasincar;Geert-Jan Houben;Peter Barna

  • Affiliations:

  • Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, the Netherlands and Erasmus University Rotterdam, PO Box 1738, 3000 DR Rotterdam, the Netherlands;Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, the Netherlands and Delft University of Technology, PO Box 5031, 2600 GA Delft, the Netherlands;Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, the Netherlands

  • Venue:
  • Information Systems
  • Year:
  • 2010

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Abstract

Hera is a model-driven methodology for designing Semantic Web Information Systems (SWIS). Based on the principle of separation-of-concerns, Hera defines models to describe the different aspects of an SWIS. These models are represented using RDF, the foundation language of the Semantic Web. Hera is composed of two phases: the data collection phase, which integrates data from different sources, and the presentation generation phase, which builds a hypermedia presentation for the integrated data. The focus of this paper is on the hypermedia presentation generation phase and the associated model specifications. The Hera presentation generation phase has two variants: a static one that computes at once a full Web presentation, and a dynamic one that computes one-page-at-a-time by letting the user influence the next Web page to be presented. The dynamic variant proposes, in addition to the models from the static variant, new models to capture the data resulted from the user's interaction with the system. The implementation is based on a sequence of data transformations applied to the Hera models that eventually produces a hypermedia presentation.