James Clark wrote:
> I am wondering whether we could allow <difference> in a very limited
> fashion that would be sufficient to support this use case. For example,
> allowing <difference> where each operand matches exactly one string.
> This would be easy to implement. Wouldn't it also have the benefit of
> making the language as a whole closed under difference?
I like this idea.
Is <not> for <text/> only, or is it for <data ..> as well? If
we allow <data> to have <not>, we have to use equality
check. But it's there already.
Cheers,
Makoto
