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RE: Xpointer

From: Charles McCathieNevile <charles@w3.org>
Date: Wed, 14 Aug 2002 21:12:57 -0400 (EDT)
To: <DPawson@rnib.org.uk>
cc: <wai-xtech@w3.org>
Message-ID: <Pine.LNX.4.30.0208142111370.15568-100000@tux.w3.org>

Yes, it is a restriction to prefer IDs and there are real use cases where
they shoudn't be preferred. But there are lots where they should. Maybe it is
too strong a point to make in anything but general guidance on "how to choose
URIs" and "how authoring tools should pick anchor points"


On Tue, 13 Aug 2002 DPawson@rnib.org.uk wrote:

>> -----Original Message-----
>> From: Charles McCathieNevile [mailto:charles@w3.org]
>> Sent: Monday, August 05, 2002 6:17 AM
>> I'm looking at the simple case where an Xpointer constructed
>> by counting
>> elements or something points to a thing with an ID already.
>> (if the tool
>> constructs an ID it is not certain that other tools will have
>> this available
>> to refer to without having an agreed way of assigning ID, and
>> that gets
>> circular...)
>> IDs are normally the most robust things over changes. So an
>> Xpointer tool
>> could check for an ID and ask if there was any reason not to use it...
>I've no objection to 'preferring' id's, but to say should is diminishing
>the point of xpointer imo. One of its uses is to specify the third para
>element, or the nth word in the mth para in the pth section.
>Seems like quite a restriction Charles?
>regards DaveP
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Charles McCathieNevile    http://www.w3.org/People/Charles  phone: +61 409 134 136
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Received on Wednesday, 14 August 2002 21:13:16 UTC

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