You're asking it to output the result of concat($p1/../caption, ' ',
$p1/description), and that's what it's doing. If you want to treat
caption/eval as an expression and evaluate it, rather than outputting its
string value, then you will have to ask for that by another call on
saxon:evaluate().
Regards,
Michael Kay
http://www.saxonica.com/
http://twitter.com/michaelhkay
-----Original Message-----
From: Rowan Sylvester-Bradley [mailto:rowan(_at_)sylvester-bradley(_dot_)org]
Sent: 19 December 2009 01:18
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: [xsl] Recursive evaluation of expressions
I'm still struggling to get this working. I need to be able
to evaluate XPath expressions in my input XML document. This
works OK, but I also need to be able to refer in an XPath
expression to an element that contains another expression,
and to pick up the result of evaluating the second
expression, not just the text of the expression.
Here's a sample input document:
<items>
<item>
<id>a</id>
<caption>Sandwich Meal</caption>
<item>
<id>a1</id>
<description>White roll</description>
<caption><eval>concat($p1/../caption, ' ',
$p1/description)</eval></caption>
<item>
<id>a1a</id>
<description>Chicken</description>
<caption><eval>concat($p1/../caption, ' ',
$p1/description)</eval></caption>
</item>
<item>
<id>a1b</id>
<description>Ham</description>
<caption><eval>concat($p1/../caption, ' ',
$p1/description)</eval></caption>
</item>
</item>
</item>
</items>
And here's a simplified version of my stylesheet:
<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
xmlns:xs="http://www.w3.org/2001/XMLSchema";
xmlns:saxon="http://saxon.sf.net/";
exclude-result-prefixes="xs saxon">
<xsl:strip-space elements="*"/>
<xsl:output indent="yes"/>
<xsl:template match="node()|@*">
<xsl:copy>
<xsl:apply-templates select="node()|@*"/>
</xsl:copy>
</xsl:template>
<xsl:template match="item">
<item>
<xsl:apply-templates>
<xsl:with-param name="source" select="." tunnel="yes"/>
</xsl:apply-templates>
</item>
</xsl:template>
<xsl:template match="eval">
<xsl:param name="source" tunnel="yes"/>
<xsl:value-of select="saxon:eval(saxon:expression(.),
$source)"/>
</xsl:template>
</xsl:stylesheet>
This produces the following:
<?xml version="1.0" encoding="UTF-8"?>
<items>
<item>
<id>a</id>
<caption>Sandwich Meal</caption>
<item>
<id>a1</id>
<description>White roll</description>
<caption>Sandwich Meal White roll</caption>
<item>
<id>a1a</id>
<description>Chicken</description>
<caption>concat($p1/../caption, ' ',
$p1/description) Chicken</caption>
</item>
<item>
<id>a1b</id>
<description>Ham</description>
<caption>concat($p1/../caption, ' ',
$p1/description) Ham</caption>
</item>
</item>
</item>
</items>
What I want instead of
<caption>concat($p1/../caption, ' ',
$p1/description) Chicken</caption> is
<caption>Sandwich Meal White roll Chicken</caption>
How can I get it to do this?
Many thanks - Rowan
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