บทความ Wed design and development
ABSTRACT
Data-intensive Wed sites are large sites based on a back-end database, with a fairly complex hypertext structure. The paper develop two main contribution: (a) a specific design methodolgy for data-intensive Wed sites, composed of a set of steps and design transformations that lead from a conceptual specification of the domain of interest to the actual implementation of the; (b) a tool called Homer, conceived to support the site design and implementation process, by allowing the designer to move through the various steps of the methodology, and to automate the generation of the code needed to implement the actual site. Our approach to site design is based on a clear separation between several design activities, namely database design, hypertext design, and presentation design. All these activities are carried on by using high-level models, all subsumed by an extension of the nested relational model; the mappings beween the models can be icely expressed using the design process, and on their representation in the algebraic framework,Homer is able to generate all the code neededf for the actual generation of the site, in a completely automatic way.