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Re: Collect word count with xslt2.0 on saxon 8
Subject: Re: Collect word count with xslt2.0 on saxon 8
From: George Cristian Bina <george@xxxxxxxxxxxxx>
Date: Thu, 18 May 2006 10:40:41 +0300
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Hi Karen,
> It seems that the template rule would remove the node from the source
In XSLT the source is read-only, XSLT does not change the source in any way.
Have a look at the built-in template rules
http://www.w3.org/TR/xslt#built-in-rule
If you have an empty stylesheet that will actually use only built-in
rules and will walk the source document and output all the text nodes.
The sample I posted used two modes so that we can walk the source tree
with two sets of rules. The first set of rules in the default mode
identify the elements whose text content we want to count and start a
walking of the source from each identified element children using the
second set of rules that are placed in the getText mode.
<xsl:apply-templates mode="getText" select="node()"/>
If we do not define any template for this mode then the built-in
template rules will get the all the text nodes, but as we want to
exclude elements with the specific mark then we just add a rule that
matches them and does nothing. If you want also the comments to be
excluded then you should add a rule for that:
<xsl:template match="comment()" mode="getText"/>
Placing the call to apply-templates with the getText mode inside a
variable redirects the output to that variable, then we use it to
generate the required output on the template rules in the default mode.
Best regards,
George
---------------------------------------------------------------------
George Cristian Bina
<oXygen/> XML Editor, Schema Editor and XSLT Editor/Debugger
http://www.oxygenxml.com
Karen McAdams wrote:
Hi George-
Thanks for the code sample. I would like to better understand how this apply-templates works-
<xsl:template match="*[contains(@class, 'topic/topic')]"
mode="getText"/>
<xsl:apply-templates mode="getText" select="node()"/>
It seems that the template rule would remove the node from the source at the processing context yet with the apply templates it actually retrieves it- could you elaborate on this approach - I also need to remove from the node comment elements before I count the text contents of the node -
If I add an template
<xsl:template match="draft-comment" mode="getText"/>
I get -
BUILD FAILED
java.lang.StackOverflowError
( I am building with Ant but this is an xsl related error . )
Karen
------------------------------
Date: Tue, 16 May 2006 10:04:22 +0300
To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
From: George Cristian Bina <george@xxxxxxxxxxxxx>
Subject: Re: Collect word count with xslt2.0 on saxon 8
Message-ID: <44697976.1000108@xxxxxxxxxxxxx>
Hello Karen,
You can get the count of words more easily than that. First you can get
the text in a variable that belongs to an element with topic/topic but
not to other elements inside it with the same mark and then just count
the words in that.
For getting the text once we match on a topic/topic element we use a new
mode for apply-template on which we do nothing on elements with
topic/topic thus we exclude their text content.
The following stylesheet shows that
<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output indent="yes"/>
<xsl:template match="/">
<counts>
<xsl:apply-templates/>
</counts>
</xsl:template>
<xsl:template match="text()"/>
<xsl:template match="*[contains(@class, 'topic/topic')]">
<xsl:variable name="text">
<xsl:apply-templates mode="getText" select="node()"/>
</xsl:variable>
<record>
<text>
<xsl:value-of select="$text"/>
</text>
<count>
<xsl:value-of
select="count(tokenize(lower-case($text),'(\s|[,.!:;]|[n][b][s][p][;])+')[string(.)])"
/>
</count>
</record>
<xsl:apply-templates/>
</xsl:template>
<xsl:template match="*[contains(@class, 'topic/topic')]"
mode="getText"/>
</xsl:stylesheet>
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