2016-05-10 UTC
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tantek http://leancrew.com/all-this/2014/11/more-rss-mess/ footnote 1: "At the risk of offending Atom partisans, I’m going to lump all feed formats together and call them RSS. I know this isn’t technically correct—and the mix of formats is another part of the mess—but it’s common parlance and it’s a convenient shorthand." - thus justifying RSS 4.01