Dexter is a tool that allows users to define extended attributes which can be associated with descriptors and editors. These attributes can be embedded into any well-formed XML document. The resulting embellished document, the 'source', is then input to the dexter engine. This will generate one or more XSLT stylesheets describing the input document interpolating editor modifications and any instructions specified by the descriptors. As dexter's operations are specified exclusively with extended attributes, all but the most unforgiving of XML content viewers will continue to see the decorated source exactly as the designer saw it before.