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Hi
TC'ers,
I
agree with Mike except for the comment portion of the XRI. Maybe the spec.
should read:
Two
XRIs are equivalent if the NON-COMMENT portions of the XRIs are byte-for-byte
equivalent.
That
being the normative part of the spec. At this point, some people may
mis-interpret the intent (as I did), so maybe a discussion of case sensitivity
in regards to resolution should follow (non-normative):
During resolution, the manager of each namespace may have their own rules
for case sensitivity and equivalence in general. One namespace owner
might consider "Invoice" and "invoice" to be the same for the purposes of
resolution. Another may consider "grey" and "gray" to be the same.
Since you can't know that without invoking the resolution process, they should
be considered different XRIs that happen to point to the same
resource.
Obviously, this is a sensitive issue :-)
=Loren
Hi
All,
I'd
like to follow up on the case-insensitivity issue and mention what I see as a
reasonable example that would argue against case-insensitivity. In my
experience, the vast majority of my accounts/login IDs on various systems are
case sensitive. Also, in unix-based systems (and many others),
most identifiers (anything in the file system for sure) are case
sensitive. If any of these identifiers are to be used in XRIs,
the case-sensitivity would need to be maintained, or ambiguity would be
introduced.
Between this issue and the Unicode issue, it seems to
me that it would be a bad idea to try to make any part of an XRI case
insensitive.
Mike
Case insensitivity is a form of normalization that a large population
of people receive benefit from. If there's a way to provide that
benefit to those people without degrading functionality where it doesn't
make sense, then I think we should do it.
I'd hate to see case insensitivity for ALPHA characters go
away.
=LOREN
-----Original Message-----
From:
Dave McAlpin [mailto:dave.mcalpin@epokinc.com]
Sent: Thursday,
September 04, 2003 11:06 AM
To: 'Sakimura, Nat'; 'Wachob, Gabe';
xri@lists.oasis-open.org
Subject: RE: [xri] Draft -07 feedback
from another Visa person (responses cont'd)
So are we OK with
case-insensitive comparison for ALPHA characters in the authority
component, or should we drop this altogether?
-----Original
Message-----
From:
Sakimura, Nat [mailto:n-sakimura@nri.co.jp]
Sent: Thursday, September 04, 2003
10:57 AM
To: Dave
McAlpin; Wachob, Gabe; xri@lists.oasis-open.org
Subject: RE: [xri] Draft -07 feedback
from another Visa person (responses cont'd)
I do
not think that there is a good way of introducing “case insensitivity” to
Unicode in general.
Case
insensitivity is a form of normalization, which is very problematic for
the international character set. IMHO, only meaningful form of general
equivalence is the bit to bit comparison or the comparison of the resolved
result from the same authority.
Nat
-----Original
Message-----
From: Dave
McAlpin [mailto:dave.mcalpin@epokinc.com]
Sent: Friday, September 05, 2003 2:43
AM
To: 'Wachob, Gabe';
xri@lists.oasis-open.org
Subject: RE: [xri] Draft -07 feedback
from another Visa person (responses cont'd)
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