There are a number of
cosmetic and UI changes, but the biggest difference is under the
hood: the new validator is using a new library as a wrapper around
its main parser, resulting in drastic speed improvements, and a lot
of interesting new possibilities.
Users of the validator are probably familiar with the note stating
“The Validator XML support has some limitations”. Be prepared to say
good bye to such a familiar sight: while the 0.8.0 validator is still
using the same base parser for validation (the excellent and
venerable opensp), it now has an XML sidekick making sure XML-ill-
formedness won’t go unnoticed.