Ch-1_An introduction to Web Engineering.pptx

Editor's Notes

• #2 Web services, are not Web applications, but they can be part of one Web sites without software components, such as static HTML pages, are not Web applications either
• #4  Workflow-based applications are transaction-based the higher level of development requires the previous development of a less complex category. Exception : Some of the categories (e.g. the portal-oriented applications) are historically rather recent while having a lower degree of complexity Web application can be started in any of these categories and later expanded to increasing degrees of complexity Newer categories are generally more complex, but this does not mean they can fully replace the older generation. Web applications can typically be assigned to several categories at once
• #5 Web sites requiring frequent changes or for sites with huge numbers of pages this is a significant cost factor and often results in outdated information. Additionally Danger of inconsistencies : some content is frequently represented redundantly on several Web pages for easy acces Short response time : the pages are already stored on the Web server. Example : Static homepages, webcasts, and simple web presences for small businesses belong in this category.
• #6  Web applications emerged, offering a first, simple, form of interactivity by means of forms, radio buttons and selection menus. Web pages and links to other pages are generated dynamically according to user input
• #7 more interactivity : not only interacting with the application in a read-only manner, but also by performing updates on the underlying content. Data Driven : prerequisite for this are database systems
• #8 handling of workflows : companies, public authorities, and private users Interoperability : A driving force for this is the availability of appropriate Web services to guarantee interoperability Challenges : The complexity of the services in question, the autonomy of the participating companies and the necessity for the workflows to be robust and flexible are the main challenges
• #9 groupware employed especially for co-operation purposes in unstructured operations support shared information and workspaces in order to generate, edit, and manage shared information They are also used to keep logs of many small entries and edits (as in Weblogs), to mediate meetings or make decisions
• #11 Business portals give employees and/or business partners focused access to different sources of information and services through an intranet or extranet. Marketplace portals are divided into horizontal and vertical market places. Horizontal marketplaces operate on the b2c and b2b selling their products to companies from other sectors. Vertical marketplaces: companies from a single sector, suppliers on one side and manufacturing companies on the other Community portals are directed at specific target groups (young people) try to create customer loyalty through user interaction or to provide individual offers through appropriate user management (one-to-one marketing).
• #14 An example of this would be displaying the menu of the day on the mobile devices of all users entering a restaurant between 11 am and 2 pm For this type of system it is important to take into account the limitations of mobile devices (bandwidth, screen size, memory, immaturity of software, etc.) and the context in which the Web application is currently being used. Based on this dynamic adjustments according to the users’ situation can be made near future where ubiquitous applications will dominate the market.
• #16 The goal of the Semantic Web is to present information on the Web not merely for humans, but also in a machine-readable form