Web applications evolve fast. One of the main reasons for this evolution is that new requirements emerge and change constantly. These new requirements are posed either by customers or they are the consequence of users' feedback about the application. One of the main problems when dealing with new requirements is their consistency in relationship with the current version of the application. In this paper we present an effective approach for detecting and solving inconsistencies and conflicts in web software requirements. We first characterize the kind of inconsistencies arising in web applications requirements and then show how to isolate them using a modeldriven approach. With a set of examples we illustrate our approach.
In this paper we present an approach for oblivious composition of Web user interfaces, particularly for volatile functionality. Our approach, which is inspired on well-known techniques for advanced separation of concerns such as aspect-oriented software design, allows to clearly separate the design of the core's interface from the one corresponding to more volatile services, i.e. those that are offered for short periods of time. Both interfaces are oblivious from each other and can be seamlessly composed using a transformation language. We show that in this way we simplify the application's evolution by preventing intrusive edition of the interface code. Using some illustrative examples we focus both on design and implementation issues, presenting an extension of the OOHDM design model which support modular design of volatile functionality
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