A Three-Level Schema Architecture for the Conceptual Design of Web-Based Information Systems

M. Schrefl, G. Preuner
Technical Report
TRE0001 (April, 2000)
Research Report ACRC-00-009, University of South Australia, Advanced Computing Research Centre, School of Computer and Information Science, April 2000
Copy  (In order to obtain the copy please send an email with subject  TRE0001  to dke.win@jku.at)


It has been recognized only recently that, like databases, web sites need models and schemes. Data-intensive web sites are best developed using a multi-level design approach proceeding from data design via navigation design to web-page design. Modern web-based information systems are no longer static in nature. Rather they are dynamic. Besides querying, they support workflow tasks and e-commerce transactions. The design of such systems needs to consider the underlying business process next to the data. Their integrated design has been mainly treated in an ad-hoc way so far. In this paper, we present a three-level schema architecture for the conceptual design of dynamic web-based information systems. We employ an object-oriented approach that integrates data and process management and complements previous approaches for the design of data-intensive web sites.

Keywords:web-based information system, object-oriented database system, object-oriented design, schema architecture, workflow