There have been several authoring methods proposed in the literature that are model based, essentially following the Model Driven Design philosophy. While useful, such methods need an effective way to allow the application designer to somehow synthesize the actual running application from the specification. In this paper, we describe HyperDe, an environment that combines Model Driven Design and Domain Specific Languages. We show the advantages of this combination to enable rapid authoring and prototyping of Web applications. Categories and Subject Descriptors H.5.4 [Hyperext/Hypermedia]: Architecture; Navigation. D.2.1 [Software Engineering]: Requirements/Specification. D.2.2 [Software Engineering]: Design Tools and Techniques. General Terms Design, Languages. Keywords Model-based Designs, Hypermedia Authoring.