Frontpage produces HTML because the user layouts out a page using a
Graphical interface and HTML can express the layout necessary to reproduce
the desired result.

That works because HTML defines a large set of element names and attributes
that have specific meaning.

However there no defined names or attributes with any specific meaning in
XML so how would an editor know what to create?

Again you asking an automatic tool to work in a semantic vacuum.  The
generator would have to understand the meaning of the XML elements to start
with and would also need some other definition of how such meanings would be
represented visually.

Only then would a an automatic tool have a fighting chance of creating XSL
that can transform the XML.  However the effort involved in all this would
be greater than the effort to create the XSL manually.

Ummm.... VisualStudio? It's always worked for me... Just Add an XML file
to your project.

-ca