reversing element ordering, with a caveat

[Michael Kay]

> The ordering appears to remain stable in Saxon, even w/out 
> the 'stable' keyword.

Yes, that's correct. I expect there are a few microseconds to be saved by
not doing stable ordering unless the user requests it, but I would think
more people will notice that their results have become unpredictable than
will notice the performance improvement.

Michael Kay
http://www.saxonica.com/