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Posted by ZeldorBlat on 12/15/05 20:28
You can look at the <dc:date> element inside the <channel> element.
Not sure if this is required or not (it might not be), but it should
tell you when the feed was last updated (according to the author,
anyway).
But whether you fetch the whole thing and compare it to the previous
day or fetch the whole thing and compare the date to your stored "last
updated" field, you still need to fetch the feed. And, if you needed
to compare the whole file, so what? You're only doing it once per day.
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