Semantic Web Information Systems (SWIS) are Web Information Systems that use Semantic Web technologies. Hera is a modeldriven design methodology for SWIS. In Hera, models are represented in RDFS and model instances in RDF. The Hera Presentation Generator (HPG) is an integrated development environment that supports the presentation generation layer of the Hera methodology. The HPG is based on a pipeline of data transformations driven by different Hera models. Categories and Subject Descriptors H.5.4 [Information Interfaces and Presentation]: Hypertext/Hypermedia—Architectures, Navigation; D.2.2 [Software Engineering]: Design tools and techniques—Computer-aided software engineering (CASE); I.2.4 [Artificial Intelligence]: Knowledge representation formalisms and methods—Representation languages General Terms Algorithms, Design, Management Keywords Design environment, RDF(S), SWIS, Semantic Web, WIS