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RE: [F&O] Casting to xs:NOTATION, xs:QName not clarified

From: Ashok Malhotra <ashok.malhotra@oracle.com>
Date: Wed, 26 Jan 2005 17:39:00 -0800
To: legler@sigma.informatik.hu-berlin.de, public-qt-comments@w3.org
Message-ID: <20050126173901065.00000002336@amalhotr-pc>

Frank:
My apologies!  I thought the issue had been clarified in the ensuing discussion but, clearly, I was mistaken.

When you cast, you, in general, cast an expression.  The prohibition for casting from string to QName in the casting section refers to this general case.  If you do have a string literal you can construct a QName from it.

If you feel strongly abt this, we can consider a change that says "casting from string to QName is not allowed in general but allowed in the special case that you are casting a string literal" but this seems like a minor
corner case to me.


All the best, Ashok
> -----Original Message-----
> From: public-qt-comments-request@w3.org [mailto:public-qt-comments-
> request@w3.org] On Behalf Of Frank Legler
> Sent: Wednesday, January 26, 2005 2:57 PM
> To: public-qt-comments@w3.org
> Subject: RE: [F&O] Casting to xs:NOTATION, xs:QName not clarified
> 
> 
> Hello,
> 
> I am sorry to repeat myself, but I did not
> receive a satisfying answer the last time.
> 
> According to Ashok's mail from 5 Nov 2004 [1]
> and from 17 Jan 2005 [2] is it "possible to
> construct xs:QName and xs:NOTATION from string
> literals"
> 
> Nevertheless the casting table in the F&O spec [3]
> prohibits the cast from xs:string to xs:QName
> and xs:NOTATION. Michael Rys pointed out that
> the table applies to both constructors and
> casts [4].
> 
> My question is if this is
> (1) an error in the spec, i.e. the casting table
>     needs to be corrected?
> or
> (2) we indeed can construct xs:QName and
>     xs:NOTATION from xs:string but cannot cast it?
> 
> 
> Regards,
> Frank
> 
> URLS:
> [1] http://lists.w3.org/Archives/Public/public-qt-comments/2004Nov/0019.
> html
> [2] http://lists.w3.org/Archives/Public/public-qt-comments/2005Jan/0023.
> html
> [3] http://w3.org/TR/xpath-functions/#casting-from-primitive-to-primitive
> [4] http://lists.w3.org/Archives/Public/public-qt-comments/2005Jan/0020.
> html
> 
> 
> 
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Received on Thursday, 27 January 2005 01:39:50 UTC

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