Quote:
Originally Posted by kiwidude
CSS validation I don't recall ever coming up on this thread (beyond the wish for detecting unused styles). I vaguely recall some discussion in the Sigil forum but I never paid any notice to it. It would have to be an offline option so if you have a particular candidate tool I'm happy to give it a quick whirl. Though of course it may suffer the same pitfalls as those other tools above and again be something that would be best implemented in Sigil...
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Well, the w3 validation can be downloaded for offline use. The jar file can be downloaded and called with options. At least, that is what
W3 is saying.
I tend to agree with the arguments of EpubCheck and FlightCrew, although I tend to solve all the errors.