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Simon Willison’s Weblog

RSS Duplicate Detection. “Detecting duplicate items in an RSS feed is something of a black art”. I hadn’t realised quite how involved such a basic function of an aggregator could be.

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3 comments

  1. With RSS it definitely is a black art. Atom, fortunately, makes it much easier with it's id and timestamp requirements. Even that, however, requires that feed publishers use the mechanisms properly.

    James Snell - 22nd January 2008 22:59 - #

  2. This is me laughing maniacally, exhibiting a variety of facial tics and body twitches.

    l.m.orchard - 23rd January 2008 05:53 - #

  3. Issues like this makes me feel very fuzzy and smug about fighting for a MUST-requirement on atom:id in RFC 4287. Not that it had a lot of opposition, but it had enough to require a bit of insistency and force to get it in.

    Asbjørn Ulsberg - 23rd January 2008 14:04 - #

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