Hi,
I tried to summerize this issue for the benefit of my own
understanding, and would be glad to be corrected if something's
wrong. Mainly I did this because I wanted to test if
Libxslt (1.1.15) works the same way as Saxon (6.5.5) here.
Selection of text-nodes
=======================
Stylesheet
------------
<?xml version="1.0"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";> [^]
<xsl:template match="/">
<output><xsl:apply-templates select="foo"/></output>
</xsl:template>
<xsl:template match="foo">
<xsl:text>"</xsl:text><xsl:value-of
select="text()"/><xsl:text>"</xsl:text>
</xsl:template>
</xsl:stylesheet>
Instance
----------
<?xml version="1.0"?>
<foo>Johnny
<bar>don't</bar>
B.
<bar/>Good
</foo>
The output will be:
<output>"Johnny
"</output>
So only the first text node is processed.
On the other hand, changing the stylesheet to use a
<xsl:copy-of select="text()"/> (note "copy-of") will output the text
of _all_ selected text-nodes:
<output>"Johnny
B.
Good
"</output>
A <xsl:copy-of select="."/> will select the concatenated text of all
descendant text-nodes in document-order; note the additional "don't" in
the result:
<output>"Johnny
don't
B.
Good
"</output>
Handling of whitespace
======================
Stylesheet
------------
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";> [^]
<xsl:template match="/">
<output><xsl:apply-templates select="foo"/></output>
</xsl:template>
<xsl:template match="foo">
<xsl:text>"</xsl:text><xsl:value-of
select="."/><xsl:text>"</xsl:text>
</xsl:template>
</xsl:stylesheet>
Instance
----------
<?xml version="1.0"?>
<foo>
<bar/>
B.
<bar/>
</foo>
This will produce:
<?xml version="1.0"?>
<output>"
B.
"</output>
Note here that the text-nodes (actually containing only whitespace)
before the first <bar/> and after the second <bar/> are included in
the resulting output; that's why we get the additional empty lines
surrounding the "B.".
Now, the addition of <xsl:strip-space elements="*"/> to the stylesheet
will procude the following:
<?xml version="1.0"?>
<output>"
B.
"</output>
The text nodes containing only whitespace, have been removed from the
input XML by <xsl:strip-space elements="*"/>
MSXML does strip such whitespace text-nodes by _default_. So one might
want to use <xsl:strip-space elements="*"/> for compatibility with
the MSXML-XSLT engine.
Regards,
Kasimier
On Sat, 2006-01-21 at 21:35 +0100, Liron wrote:
Hi Andrew,
[..]
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