I was wondering if there are libraries to validate rss 2.0 and atom
locally, for testing purposes?  I am aware of FeedValidator gem, but
I'd like to validate w/o having to make a web service call to the
"official" validator to keep the test running fast.  There are plenty
of feed parsing libraries, but I'm sure many of them can parse things
that aren't necessarily valid and may not care about validity if the
xml is close enough.

thanks,
- rob

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