Schema-sensitive editing in emacs, based on W3C XML Schema? (not RNG)

Question

I just learned, here, about nxml-mode, which, according to the README, is a

major mode for GNU Emacs for editing XML documents. It supports editing we

Answer 1

Even without schemas it is quite useful. You can auto-complete closing tags, navigate by tag and lots of other great bells and whistles. All that said, Alex Ott is right on the money.