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clare Emma

Subject: Using variables
Author: clare Emma
Date: 02 Aug 2005 11:40 AM

Hi,

I'm trying to write a stylesheet that will analyse some boolean values in my XML document and increment or decrement a value. I've declared a variable within the stylesheet to hold this but I'm not sure how to change this value or if this is the best way to do it, any help would be most appreciated.

Clare

Ivan Pedruzzi

Subject: Using variables
Author: Ivan Pedruzzi
Date: 02 Aug 2005 12:47 PM

In XSLT variables are immutable.
In your case I would use the count function.

Here an example

XML
<?xml version="1.0"?>
<books>
<book>
<title>AAA</title>
<paperback>false</paperback>
</book>
<book>
<title>BBB</title>
<paperback>true</paperback>
</book>
<book>
<title>CCC</title>
<paperback>true</paperback>
</book>
</books>

The following XSLT prints the number of paperbacks

<?xml version='1.0'?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

<xsl:template match="/">
<xsl:value-of select="concat('Paperback ', count(/books/book[paperback='true']))"/>
</xsl:template>

</xsl:stylesheet>

Hope this helps
Ivan Pedruzzi
Stylus Studio Team

clare Emma

Subject: Using variables
Author: clare Emma
Date: 03 Aug 2005 04:03 AM

Oh thanks, that's useful to know (I'm real new it this). But what if I had a couple more boolean values within <book> and wanted to count. Is there any easy way of doing that?

I had something like:

<book>
<title>AAA</title>
<paperback>false</paperback>
<english>true</english>
<inPrint>true</inPrint>
</book>

and for each book I will create a value based on the three booleans within it, say true will add one to my value and false will subtract one. Ultimately I want to add this calculated value to a new XML document using the stylesheet.

Thnaks,
Clare

Ivan Pedruzzi

Subject: Using variables
Author: Ivan Pedruzzi
Date: 03 Aug 2005 12:04 PM

Try the attached solution it should be auto explanatory.

Hope this helps
Ivan Pedruzzi
Stylus Studio Team

paperback.xsl

paperback.xml

clare Emma

Subject: Using variables
Author: clare Emma
Date: 04 Aug 2005 10:49 AM

Thanks Ivan,

You've been really helpful!!

Clare

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