RE: [xml-dev] Handling of significant whitespace in .NET XmlReade r

[Eckenberger Axel <Extern.Eckenberger@kmweg.de>]

> -----Original Message-----
> From: Eckenberger Axel 
> Sent: Freitag, 4. Juli 2003 09:10
> To: 'Dare Obasanjo'; xml-dev@lists.xml.org
> Cc: Scherbel, Michael
> Subject: RE: [xml-dev] Handling of significant whitespace in 
> .NET XmlReade r
> 
> 
> Dare,
> 
> > Whitespace is made significant by the presences of an
> > xml:space="preserve".
> 
> Thist only means that _all_ the whitespace for a given 
> element is preserved, this is a workaround that I know of, 
> and are actually using. However, even if this attribute is 
> not set, semantically significant whitespace in mixed content 
> must be preserved. 
> 
> <sampleData>
> 	<!DOCTYPE a [
> 	....<!ENTITY uuml "ü">
> 	]>
> 	<a>
> 	....<b>aasdf...</b>
> 	....<c>
> 	........asdfasdf_dadf_.<e/>_asd_<d>asdfasd</d>_&uuml;adas
> <d>asdfasd</d>_<d>asdfas</d>_
> 	........df_asd_.&uuml;_asdf_asdf.
> 	....</c>
> 	</a>
> </sampleData>
> 
> In the above example I marked the whitespaces that in my 
> oppinion should be preserved regardless of whether whitespace 
> handling is set to preserve or not with a '.' and the 
> whitespace that I think must be preserved in any case with a '_'.

Oops ... this para schould read:

In the above example I marked the whitespaces that, in my oppinion, can be
removed with a '.' and the spaces that I think must be preserved -
regardless of whether whitespace handling is set to 'preserve' or not - with
a '_'.

> If the reader/parser removes the whitespaces marked with a 
> '_', i.e. the semantically significant whitespaces the 
> semantic of the document is changed.
> 
> E.g., given the fragment
> 
> 	<d>die</d> &Uuml;berleitung
> 
> The meaning of 'die Überleitung' (expected result) is 
> different to 'dieÜberleitung' (result returned by XmlReader).
> 
> So, I think there is a problem with the reader as it removes 
> whitespace that is semantically significant, and this, at 
> least as I read the spec, should not be done by an XML processor.
> 
> Bye
> 
> Axel
> 
> <result whitespaceHandling="significant and none"> 
> [DocumentType] a ==> "
>     <!ENTITY uuml "ü">
> "
> [Element] a ==> ""
> [Element] b ==> ""
> [Text]  ==> "aasdf   "
> [EndElement] b ==> ""
> [Element] c ==> ""
> [Text]  ==> "
>         asdfasdf dadf  "
> [Element] e ==> ""
> [Text]  ==> " asd "
> [Element] d ==> ""
> [Text]  ==> "asdfasd"
> [EndElement] d ==> ""					// missing
> whitespace node here
> [EntityReference] uuml ==> ""
> [Text]  ==> "adas "
> [Element] d ==> ""
> [Text]  ==> "asdfasd"
> [EndElement] d ==> ""					// missing
> whitespace node here
> [Element] d ==> ""
> [Text]  ==> "asdfas"
> [EndElement] d ==> ""
> [Text]  ==> "
>         df asd  "
> [EntityReference] uuml ==> ""
> [Text]  ==> " asdf asdf 
>     "
> [EndElement] c ==> ""
> [EndElement] a ==> ""
> </result>
> 
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