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.

Posted 22nd January 2008 at 8:11 pm

Recent articles

Useful patterns for building HTML tools - 10th December 2025
Under the hood of Canada Spends with Brendan Samek - 9th December 2025
Highlights from my appearance on the Data Renegades podcast with CL Kao and Dori Wilson - 26th November 2025

aggregator 1 atom 26 blackart 1 duplicates 1 james-holderness 1 rss 41 syndication 9

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