Comments on: Warning: Possible repeats ahead http://walt.lishost.org/2005/12/warning-possible-repeats-ahead/ The library voice of the radical middle. Mon, 20 May 2013 19:18:07 +0000 hourly 1 http://wordpress.org/?v=3.5.1 By: walt http://walt.lishost.org/2005/12/warning-possible-repeats-ahead/comment-page-1/#comment-2579 walt Wed, 07 Dec 2005 17:07:50 +0000 http://walt.lishost.org/?p=190#comment-2579 Jon,

Thanks for the post–and you’re right, as far as I can tell. Updating the text of a post appears to change the pubDate, but changing the categories doesn’t. Apparently, at least, given that only this modified post showed up in my Bloglines, not all of the posts where I added the category.

]]> By: Jon Gorman http://walt.lishost.org/2005/12/warning-possible-repeats-ahead/comment-page-1/#comment-2566 Jon Gorman Tue, 06 Dec 2005 18:45:10 +0000 http://walt.lishost.org/?p=190#comment-2566 Each item (post) has a guid (unique id, usually the url to the post) and a pubDate. I think bloglines and other aggregators check and see if there is an item in the feed with the same guid and same pubDate. If so, it leaves it. If the pubDate has changed, it shows as a “new” entry. I don’t think the catagories actually have an effect on the content of items so you might be ok. If not there might be a way to “supress update” . For some reason I’m having trouble accessing your rss feed directly I can’t verify it.

(yeah, I know, only a geek would look at the actual RSS feed).

Jon Gorman

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