Comment Dbooth 9a

I believe we are down to two open comments, one of which is this one:

http://lists.w3.org/Archives/Public/public-grddl-comments/2007AprJun/0069

I tried replying

http://lists.w3.org/Archives/Public/public-grddl-comments/2007AprJun/0096
and
http://lists.w3.org/Archives/Public/public-grddl-comments/2007AprJun/0097

A short summary of the issues is:

a)
How does GRDDL work in a framework passing XML messages?

b)
What about time varying resources

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This is all couched in the commentator's general dislike of some of the 
design choices of GRDDL, and so it is hard to see the wood for the trees.
In particular, the commentator's repeated insistence that we should have 
defined GRDDL in terms of representations rather than resources seems to 
me to be a red herring.

===

Just a little bit more:

a)
How does GRDDL work in a framework passing XML messages?
There are specific technical questions, which the commentator poses as 
problems with the spec, but are more constructively read as: how do I do 
this in GRDDL.
I believe I have answered the technical questions, but have not yet 
heard back, whether these address the comments.
I perhaps should have had a round of: what I hear you ask is ...., and 
having agreed the questions, I could then have shown how the spec 
addresses this use case.

b)
What about time varying resources, isn't the rule to merge the GRDDL 
results of a resource going to cause problems with time (specific 
example was a weather site).

I pointed out in
http://lists.w3.org/Archives/Public/public-grddl-comments/2007AprJun/0097
that a GRDDL aware agent is not required to merge results over time, but 
the spec licenses such an operation.

On reflection, I think this is a feature.
I think if you are publishing a time-varying resource, with a GRDDL 
result, then the results should be mergeable to produce sense rather 
than nonsense. A particular GRDDL application can then legimately merge 
your results over time, to, for example, plot a graph of the weather 
pattern.
This would mean that for that sort of resource, the GRDDL results should 
be appropriately modelled, probably with a timestamp somewhere in the 
representation.


Jeremy







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