Walter Underwood wrote:
This also means that Atom cannot be used for BBC News, where order is significant and non-chronological.
Could you elaborate on that?
The BBC News feeds are ordered by "importance", not date. Since the order is not significant, intermediate nodes could re-order the feed and be perfectly legal Atom processors.
A publishing date order can be recovered from the date information in Atom. Other orders cannot.
I think that ordering by importance asks for some kind of semantic adjustment. It should not have impact on the order in which entries appear.
-- Anne van Kesteren <http://annevankesteren.nl/>