Design of Web-based Systems IS Development: lecture 10.
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Design of Web-based Systems IS Development: lecture 10
Hardware of web-based systems Database and other computing resources Users directly accessing organisational resources Web server, including an organisation’s web pages. Sources of data for use via the web pages.
The distinctiveness of the web Data use not contained purely within organisational boundaries. Client-server model taken to an extreme - processing can take place on the browser or on the host computer. Requires extra software to link databases to the web and browsers to internal IS
Issues for Design of Systems Management of the interaction between analysts, developers and graphic designers. How much processing should take place on the client side, how much on the server side? How can the architecture of systems with many links be given a formal design?
Business Objects Database design Design of Client Pages Design of Server Pages Design activities for web-based systems
Designing a Systems Architecture Appreciating how a whole web site links together. Analysing the need, if any, for external links. Documenting the links and how they are related to pages.
Role of UML techniques in web design (1) Understand system functionality: use case models. Build business classes and relationships: class diagram. Integrate web pages as boundary classes (incl. graphic design): architecture modelled as class diagram