Michael Huebner wrote: > > may in XXE the generated content (in Parent:before) depend on the > existence of an optional (last) subelement Child of element Parent? > > I want to provide a value-editor for an attribut of Parent only if > Parent has no (last) subelement of type Child.
Yes, but you need to write a style sheet extension in Java. See http://www.xmlmind.com/xmleditor/_distrib/docs/dev/ar01s07.html

