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Re: includePathStartsWith and initial /

From: Andrea Perego <andrea.perego@uninsubria.it>
Date: Fri, 21 Dec 2007 13:36:24 +0100
Message-ID: <476BB348.1080103@uninsubria.it>
To: Jeremy Carroll <jjc@hpl.hp.com>
CC: public-powderwg@w3.org

Hi, Jeremy.

Leaving aside for the moment the main issue, I have a question on your
example.

If I've correctly understood, you're saying that, in
mailto:jeremy.carroll@hp.com, jeremy.carroll@hp.com is the URI path. Am
I right? But according to the URI specification [1], mailto: should be
the URI scheme and jeremy.carroll@hp.com should be the URI authority
(which can be further split into: jeremy.carroll -> URI user infos;
hp.com -> URI host).

Syntactically, URI (absolute) paths must always start with / . However,
we do have the problem you're pointing out, but, as far as I can see,
the option requiring that / *must be* excluded and the one requiring
that it *must be* included are equivalent. Actually, the former has the
advantage that we can consider / as implicit, and avoid repeating it any
time we specify a pathStartsWith constraint.

Does this makes sense?

Andrea

[1]http://tools.ietf.org/html/rfc3986


Phil Archer wrote:
> 
> Hmmm... I see.
> 
> This suggests we amend the canonicalisation steps so that missing out
> the leading / becomes important (we currently say that if it's not there
> in the value of pathStartsWith then the processor should add it in).
> 
> An alternative might be to add a new property that dealt with URI
> schemes where the assumptions made in the canonicalisation are not safe,
> i.e. a 'Do not canonicalise' flag. Would that make you throw your hands
> up in horror? I can see that it's another operational ease/semantic
> formality clash.
> 
> An alternative would be to define a set of additional properties like
> includeHostNC, pathStartsWithNC etc. that would again switch off
> canonicalisation.
> 
> Incidentally, we have an outstanding comment from Thomas Roessler that
> we haven't attended to yet on the issue of canonicalisation [1] so the
> whole thing is up for re-trial.
> 
> [1] http://lists.w3.org/Archives/Public/public-powderwg/2007Nov/0012.html
> 
> 
> Jeremy Carroll wrote:
>>
>>
>> I suggest that the examples and text should unify round the initial /
>> being included in an includePathStartsWith
>>
>> I believe that in a URI like
>>
>> mailto:jeremy.carroll@hp.com
>>
>> that the path is jeremy.carroll@hp.com
>>
>> so that
>>
>> <wdr:includePathStartsWith>jeremy</wdr:includePathStartsWith>
>>
>> matches this URI, but, in my book (but not the current WDs) not
>>
>> http://example.org/jeremy
>>
>> for which the path is /jeremy
>>
>>
>> jeremy (or /jeremy)
Received on Friday, 21 December 2007 12:31:48 GMT

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