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Re: XML Schema base64Binary simple type

From: Henry S. Thompson <ht@cogsci.ed.ac.uk>
Date: 13 Jun 2001 09:45:54 +0100
To: "Gregor Karlinger" <gregor.karlinger@iaik.at>
Cc: "XMLSigWG" <w3c-ietf-xmldsig@w3.org>
Message-ID: <f5belsopy2l.fsf@cogsci.ed.ac.uk>
"Gregor Karlinger" <gregor.karlinger@iaik.at> writes:

> Henry,
> 
> > I'm actually confused about this -- are you saying all _other_ parts
> > of the XML Sig schema use only string/'preserve' attributes and
> > elements?  It's certainly true that schema-aware processing does not
> > preserve whitespace information, but that's true of DTD-aware
> > processing as well, in lots of ways . . .
> 
> A parser MUST report any whitespace to the application as
> it has been detected in the parsed XML, according to XML 1.0:
> 
>   "An XML processor must always pass all characters in a document 
>    that are not markup through to the application. A validating 
>    XML processor must also inform the application which of these
>    characters constitute white space appearing in element content." [1]
> 
> Therefore I cannot share your concerns regarding DTD aware processing.

Attribute value whitespace is considered markup.  Attribute value
normalization always takes place, even in the absence of DTDs [1]

Schema processing simply extends the same approach to element content.

ht

[1] http://www.w3.org/TR/REC-xml#AVNormalize
-- 
  Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
          W3C Fellow 1999--2001, part-time member of W3C Team
     2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440
	    Fax: (44) 131 650-4587, e-mail: ht@cogsci.ed.ac.uk
		     URL: http://www.ltg.ed.ac.uk/~ht/
Received on Wednesday, 13 June 2001 04:46:36 GMT

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