[TAG] LG 105: RSS and Feed Readers Addendum

[Jimmy O'Regan]

(This came up elsewhere. I remember grinding my teeth about it at the
time, so I don't know why I didn't put it in the article.)

As well as having 10 different versions[1], RSS has two competing time
formats: RSS 0.91/2.0 use RFC 822 (date -R) format, RSS 1.0 uses
dc:date, which needs W3CDTF (a subset of ISO 8601: date --iso-8601, date
--iso-8601='minutes', date --iso-8601='seconds')

Mark Pilgrim has a blog entry that explains a bit of the history behind
this here:
http://diveintomark.org/archives/2003/06/21/history_of_rss_date_formats

[1] I said 9 in the article, but RSS 3.0 came afterwards (and, IIRC, is
nothing like the other 9 RSS formats)