RE: [xsl] regarding strip-space

[subbu@xxxxxxxxxxxx]

Thanks jarno, david, dimitre.and wow!! thanks for this detailed explaination 
Andy.
regards
Subbu

Quoting Andrew Welch <awelch@xxxxxxxxxxxxxxx>:

> 
> Here is a good example that may help you understand whitespace and the
> way it is handled by some processors:
> 
> Take this xml:
> 
>   <?xml version="1.0"?>
>   <root>
>     <node>Hello</node>
>     <node>World</node>
>   </root>
> 
> Here you have the root element, with two <node> elements and some
> whitespace (carriage returns, non-breaking-spaces etc) as its children.
> Without the whitespace as children, it would look like this:
> 
>   <?xml version="1.0"?>
>   <root><node>Hello</node><node>World</node></root>
> 
> This whitespace is pretty insignificant here - its only to make the xml
> more readable.  However, in certain cases you will want to handle this
> whitespace, which is where <xsl:strip-space> and <xsl:preserve-space>
> come in.
> 
> To highlight how these work, try applying this stylesheet to the above
> xml:
> 
>   <xsl:stylesheet 
>     xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
>     version="1.0" >
> 
>   <xsl:template match="root">
>     <xsl:value-of select="."/>
>   </xsl:template>
> 
>   </xsl:stylesheet>
> 
> Using <xsl:value-of select="."/> on the <root> element will give you the
> string value of all of its children, including the whitespace:
> 
>   <?xml version="1.0" encoding="utf-8"?>
>     Hello
>     World
> 
> This whitespace was only to make the xml more readable, and not wanted
> in the output.  To get rid of this, you can use <xsl:strip-space
> elements="*"/> :
> 
>   <xsl:stylesheet 
>     xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
>     version="1.0" >
> 
>   <xsl:strip-space elements="*"/>
> 
>   <xsl:template match="root">
>     <xsl:value-of select="."/>
>   </xsl:template>
> 
>   </xsl:stylesheet>
> 
> (You can be more specific than '*' but for now this will do)
> 
> So you output will now look like this:
> 
>   <?xml version="1.0" encoding="utf-8"?>HelloWorld
> 
> Note all on one line - no whitespace (carriage returns, nbsp's)
> 
> You can use this in combination with <xsl:preserve-space> to control the
> whitespace that gets copied to your output tree.  <xsl:preserve-space>
> has a higher priority than <xsl:strip-space>, so you can strip-space on
> * and then list the elements you want to keep the whitespace for:
> 
>   <xsl:strip-space elements="*">
>   <xsl:preserve-space elements="keepme"/>
> 
> on this data:
> 
>   <remove>
>     <node>Hello</node>
>     <node>World</node>
>   </remove>
>   <keepme>
>     <node>foo</node>
>     <node>bar</node>
>   </keepme>
> 
> would give you:
> 
> <?xml version="1.0" encoding="utf-8"?>HelloWorld
>     foo
>     bar
> 
> The carriage returns within <keepme> have been copied to the output
> tree, whereas those within <remove> have been stripped.
> 
> <note>
> MSXML effectively does a 'strip-space' during parse time, so the xslt
> processor side of it doesn't ever get to see this kind of whitespace,
> rendering these two commands useless.
> </note> 
> 
> 
> The joys of whitespace...
> 
> cheers
> andrew
> 
> 
> 
> 
> 
> -----Original Message-----
> From: subbu@xxxxxxxxxxxx [mailto:subbu@xxxxxxxxxxxx]
> Sent: 16 July 2002 13:34
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: [xsl] regarding strip-space
> 
> 
> 
> hi
> I read in the XSLT Reference that xsl:strip-space would actually remove
> the 
> whitespace-only text nodes from the source.
> My question is ..( sorry its a bit weird)
> 1.what is a whitespace-only node?? ( is it an empty element of kind 
> <myel></myel>)??
> 
> 2.If i have empty elements like what i have shown above(<myel></myel>)
> and if i have to pick all the myel elements which have some text in it (
> non 
> empty ) then , i beleive the only way to do it is through a condition
> <xsl:for-each select = //myel[not(string-length(.) = 0)]">
> is it true??
> 
> or are there any better ways to do it?
> 
> Subbu
> 
> 
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