Web engineering device independent Web services

Today's Web services not only have to be flexible, but also have to be device independent to support mobile devices such as WAP and PDAs. Supporting multiple Web formats (e.g., WML, HTML, etc.) is still an open challenge. Most sites have to provide a separate application for every format and reuse is not common. We are working on a methodology and a tool to support the Web developer in building flexible, device independent Web services.