Will somebody (else) please just post a nice, definitive answer to this person’s original question?
I believe that the problem is that the xmlns= clause is being recognized and therefore any XPath expressions which do not refer to it, refer to an empty namespace (which does not occur in this document because a non-empty global namespace has been specified). I see that TobyInk’s example retrieves that namespace, assigns it to a more-convenient alias ("x"), and then expressly refers to it in every search. (And, I suspect, this is the real magic ... not "//" vs. "./" as I originally thought and suggested. The use of an alias, I believe, is merely practical shorthand.)
It’s more than a little bit embarrassing, on behalf of PerlMonks as a site, when the reaction seen within a thread is for Monks to piss on one-another instead of ... simply providing a direct answer. Not a snarky list of books-to-read, not a thing to decipher. A helpful answer. And, if one answer turns out to be wrong (as I now believe mine was), a simple correction. We really don’t want people to get better answers, and to be treated in a more civilized way, next-door on StackExchange ...
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