In this paper, we present an incremental transformation framework called incXSLT. This framework has been experimented for the XSLT language defined at the World Wide Web Consortium. For the currently available tools, designing the XML content and the transformation sheets is a inefficient, a tedious and an error prone experience. Incremental transformation processors such as incXSLT represent a better alternative to help in the design of both the content and the transformation sheets. We believe that such frameworks are a first step toward fully interactive transformation-based authoring environments. Categories and Subject Descriptors D.3.4 [Programming languages]: Processors ? Interpreters, Optimization. D.2.6 [Software engineering]: Programming Environments Interactive environments. General Terms Algorithms, Performance, Design, Experimentation, Languages, Theory. Keywords XML, XSLT, Incremental transformations, Authoring tools.