- From: John Cowan <cowan@ccil.org>
- Date: Thu, 18 May 2006 11:45:04 -0400
- To: Konrad Lanz <Konrad.Lanz@iaik.tugraz.at>
- Cc: Richard Tobin <richard@inf.ed.ac.uk>, "Grosso, Paul" <pgrosso@ptc.com>, public-xml-core-wg@w3.org
Konrad Lanz scripsit:
> Up front I'd like to mention that after talking to Jose Kahan and
> thinking about the issue for a little longer we'd still prefer to also
> perform "dot and dot-dot canonicalization" (aka. remove_dot_segments).
> It will allow the reuse of existing implementations for relative URI
> resolution. More important from my point of view however is: "dot and
> dot-dot canonicalization" allows to map more equivalent documents onto
> the same serialized output and helps to avoid false negatives in XMLDSig.
Unfortunately doing so produces inaccurate results. For example, suppose
the outermost xml:base value is "foo/bar/" and the next inner one is
"../../..". Ordinary remove_dot_segments will reduce this to the null
string, but this is incorrect.
Leaving it as "foo/bar/../../.." produces the same result as in the
original context when applied to an equivalent base URI. It is only
safe to remove dots when that base URI is fully available.
--
The man that wanders far cowan@ccil.org
from the walking tree http://www.ccil.org/~cowan
--first line of a non-existent poem by: John Cowan
Received on Thursday, 18 May 2006 15:45:18 UTC