Information Technology Reference
In-Depth Information
Chapter X
Semantic Composition of
Web Portal Components
Jens H. Weber-Jahnke
University of Victoria, Canada
Yury Bychkov
University of Victoria, Canada
David Dahlem
University of Victoria, Canada
Luay Kawasme
University of Victoria, Canada
abstraCt
Many recently emerging component-based Web portal application platforms allow end users to compose
dynamic Web dialogues on the fly. Experts predict that this paradigm will enable a class of new applica-
tions for Web-based content delivery in information-rich, agile business domains, such as health care.
We present a conceptual analysis of the user-based composition paradigm currently used and argue that
its usability is limited with respect to complex, dynamic applications. To overcome these limitations, we
present an alternative composition paradigm, which is based on a semantic model of a portal's applica-
tion domain. We evaluate this approach with an application scenario in the health care domain.
introduCtion
“starting points” (or “gateways”) for Web users
of a particular service infrastructure (e.g., MSN,
AOL, Yahoo) or for users interested in a particular
subject (e.g., investment, health care, technology).
With much ambiguity, the term “Web portal” has
been used for years to refer to Web sites that provide
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