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Re: Are attribute values case sensitivite

From: Michael Kay <mike@saxonica.com>
Date: Tue, 21 Dec 2010 13:01:52 +0000
Message-ID: <4D10A540.8000507@saxonica.com>
To: Shai Gotlib <Shai.Gotlib@amdocs.com>
CC: Pete Cordell <petexmldev@codalogic.com>, Mukul Gandhi <gandhi.mukul@gmail.com>, "xmlschema-dev@w3.org" <xmlschema-dev@w3.org>
On 21/12/2010 12:44, Shai Gotlib wrote:
>
> Thank you all for your quick responses,
>
> I tried to look for some statement about it in the specs and didn’t 
> find (http://www.w3.org/TR/2008/REC-xml-20081126/)
>
> The only place that “sensitive” found there is with the context of 
> “Character Encoding” (“XML processors /SHOULD/ match character 
> encoding names in a case-*insensitive* way”).
>
> I found that <oXygen> found <xs:restrictionbase="xs:*S*tring"> as 
> valid while other XML Schema parser found it invalid…
>
> Does someone know where explicitly it is defined that it is 
> case-sensitive?
>
> Thanks in advance,
>
> Shai
>
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>

The rules for resolving a QName that refers to a schema component are in 
XSD Part 1 section 3.15.3, Schema Representation Constraint: QName 
resolution (Schema Document), in particular the rules:

2 The component's {name} matches the ·local name· of the ·QName·;
3 The component's {target namespace} is identical to the ·namespace 
name· of the ·QName·;

I'm not sure why one of these rules says "matches" and the other says 
"identical to", but the definition of "matches" in section 1.4 of XSD 
Part 2 says:

[Definition:]  match
(Of strings or names:) Two strings or names being compared must be 
identical. Characters with multiple possible representations in ISO/IEC 
10646 (e.g. characters with both precomposed and base+diacritic forms) 
match only if they have the same representation in both strings. No case 
folding is performed.

I hope that gives you the evidence trail you are looking for!

Michael Kay
Saxonica
Received on Tuesday, 21 December 2010 13:02:20 UTC

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