On Tue, Jan 10, 2006 at 05:32:08PM +0100,
 A. Pagaltzis <[EMAIL PROTECTED]> wrote 
 a message of 37 lines which said:

> I don???t think it???s controversy, so much as that most people
> apparently simply don???t care whether an entry they???ve already
> seen has changed.

It is also may be because feed writers are too eager to set <updated>
when the change is insignificant (for instance, when there is simply a
reformatting). In Atom, the specification is, IMHO, very clear:

RFC 4287, 4.2.15.  The "atom:updated" Element

   The "atom:updated" element is a Date construct indicating the most
   recent instant in time when an entry or feed was modified in a way
   the publisher considers significant.  Therefore, not all
                 ^^^^^^^^^^^^^^^^^^^^^
   modifications necessarily result in a changed atom:updated value.

But it is much more muddy in the RSS world which may explain why feed
reader programmers tend to ignore <updated>.

Developing best practices in this area is complicated because there is
a strong interaction between the feed writers and the reader software.

PS: Wikipedia allow authors to check a box "Minor update" when they
modify a page and they don't want it to be regarded as a significant
change. I wonder how many authors set it. It would be a nice Usability
study to examine that.

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