Re: what do -['a'; ^'b'] and ^['a'; -'b'] mean?

> Look OK?

I think that would be ok. Without co-constraints on the attributes, you
could wind up with things like

  <member from='0' to='9' string='+-().'/>

but I doubt the vxml for ixml gets validated by anyone very often.

                                        Be seeing you,
                                          norm

--
Norm Tovey-Walsh
Saxonica