On Fri, Jun 10, 2016 at 02:27:30PM -0000, Dimitre Novatchev dnovatchev@xxxxxxxxx scripsit:
> I would also try to use the standard XPath 2.0 function:
> 
>     deep-equal()
> 
> Yes, it doesn't generate an id for identifying a sub-tree, but still
> can be used for establishing classes of equivalence.
> 
> Just a quick thought.

Hi Dimitre --

deep-equal() works beautifully as a test but it doesn't provide a
grouping mechanism.  Going through n thousand structures pairwise just
can't be optimal.

-- Graydon, who wrote the initial very small test case using
deep-equal()