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FYI RE: #foo URI references

From: Al Gilman <asgilman@iamdigex.net>
Date: Tue, 22 Jul 2003 10:48:23 -0400
Message-Id: <5.1.0.14.2.20030722103733.027414e0@pop.iamdigex.net>
To: www-archive@w3.org

[Sent to PF, PF and UAAG Team Contacts, and WAI-CG by Bcc: to avert 
cross-posting of threads.]

The issue is: should relative URIs which contain only the #fragment syntax
be resolved against the BASE of the current Resource or the data in hand,
the content of the current document [a.k.a. Resource Representation].

Larry Masinter opined we should leave the "current document" semantics intact
as in the current RFC for URIs.

I weakly agreed, offering an argument from disorientation on refresh.

Find thread from original post to uri list at

X-Archived-At: 
http://www.w3.org/mid/5.1.0.14.2.20030722093245.02739ec0@pop.iamdigex.net

Jon, Matt, Ian:  I cite UAAG as precedent, here.

PF: Does anybody see a hole in my reasoning?  Should we be saying anything 
stronger?

WAI-CG others: if you see an issue for your group, speak up.

Al

-- original post where I take a position alleging disability interest --

At 09:49 PM 2003-07-21, Larry Masinter wrote:

>I'm in favor of leaving "#foo" as a reference to
>'this document' independent of having an explicit 'base'.

Caveat:  haven't done extensive analysis of this, nor is this in any way a
consensus position from any subset of the WAI, but there is at least one
line of argument suggesting that the disability interest would favor the
position that Larry asserted above.

This has to do with the disorientation that happens on document
refresh when someone is using a screen reader or other delivery
context where there is not a lot of persistent display buffer
between the client and the user.  The concern leads to things like

<quote
cite=
"http://www.w3.org/TR/UAAG10/guidelines.html#tech-configure-content-retrieval">

       3.5 Toggle automatic content retrieval (P1) (...)

     1. Allow configuration so that the user agent only retrieves
        content on explicit user request.

</quote>

If we bind #foo to a full global path computed with the latest state of the
BASE property this could have the effect of making intra-document
references, that _can_ be satisfied without a refresh, always force a refresh
for specification compliance.  An unintended but deleterious result for the
screen-reader-user (for example) could be that all the web-author's careful
construction of an internal navigation system would be defeated because the
visitor was finding themselves in a different document each time they try to
use the navaids to move within the one that they have in hand.

Since there is syntax, (is it sameTerminalPathSegment#foo ?) that will have
the global, with BASE invoked, effect, and this is not that burdensome with
the terminal path segments that are commonly used, I don't see the downside
to what Larry espoused.

Al

>Larry
Received on Tuesday, 22 July 2003 14:36:03 GMT

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