On 18/5/05 10:32 AM, "Graham" <[EMAIL PROTECTED]> wrote:
> The first problem is that not all systems track a modified date. If
> you're obtaining entries using an API on a closed system, and the
> system doesn't supply a modified date for whatever data you're
> syndicating, you're screwed.
Not so very long ago you suggested that aggregators look at the content to
determine if it's changed. If it's good enough for aggregators, it's good
enough for publishers (actually better than good enough since the publisher
would be able to do the test before other transformations occur, thus
eliminating some false positives).
> - I modify my atom-generating script to change which optional
> elements are included. Does the modification date change?
> - I modify my atom-generating script to change the order elements
> appear in. Does the modification date change?
> - I change the location of my entries, and therefore the atom:link
> element values. Does the modification date change?
> - I change the location of my entries, and therefore the xml:base
> attribute on a parent element. Does the modification date change?
> - I change the email address of an entry's author, but not the entry
> itself. Does the modification date change?
Some of these are format level changes, which would also include
- the publisher changes the text encoding
- the publisher starts using xml:base and relative references, but without
changing the fully resolved location of hrefs
Some are content changes, or metadata changes.
One suggests a problem with the object model.
> Don't bother answering yes or no to any of these here.
ok, I won't.
> The point is that even if you do pin down exactly which count as
> modifications, you have to demonstrate it can easily be implemented and
> tracked exactly that way on the average CMS (Note adding new columns to the
> database may not be possible).
which is more likely to be supported by the average CMS?
an automated date stamp of last modification
a user selectable date stamp of last "significant" update
According to http://www.intertwingly.net/wiki/pie/BlogToolDateSurvey it
appears that the former is already well supported.
e.
