because you don't have any states called '$st'. Try removing the quotes.
select="row[state=$st]/city"
(Perhaps you are imagining that variables in XPath are macros,
implemented using textual substitution? They aren't: they are regular
values: you can use a variable reference anywhere you can use an
expression, and nowhere else).
Michael Kay
-----Original Message-----
From: owner-xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
[mailto:owner-xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com] On Behalf Of
cknell(_at_)onebox(_dot_)com
Sent: 30 September 2003 17:42
To: XSL-List(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: [xsl] XPath predicate test and parameter problem
This is making me crazy. I can't figure out where I'm failing.
Given this data document:
<?xml version="1.0" encoding="UTF-8" ?>
<rowset>
<row>
<city>Des Moines</city>
<state>IA</state>
</row>
<row>
<city>Pittsburgh</city>
<state>PA</state>
</row>
<row>
<city>Milwaukee</city>
<state>WI</state>
</row>
</rowset>
Why does this stylesheet produce the output "Milwaukee",
<?xml version="1.0" encoding="UTF-8" ?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" indent="yes" encoding="UTF-8" />
<xsl:template match="/">
<xsl:apply-templates select="rowset">
<xsl:with-param name="st" select="'WI'" />
</xsl:apply-templates>
</xsl:template>
<xsl:template match="rowset">
<xsl:param name="st" />
<xsl:value-of select="row[state='WI']/city" /> </xsl:template>
</xsl:stylesheet>
and this one, only '<?xml version="1.0" encoding="UTF-8" ?>',
<?xml version="1.0" encoding="UTF-8" ?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" indent="yes" encoding="UTF-8" />
<xsl:template match="/">
<xsl:apply-templates select="rowset">
<xsl:with-param name="st" select="'WI'" />
</xsl:apply-templates>
</xsl:template>
<xsl:template match="rowset">
<xsl:param name="st" />
<xsl:value-of select="row[state='$st']/city" /> </xsl:template>
</xsl:stylesheet>
To save you the trouble of minutely examining the two, the
difference is that in the one that doesn't work the way I
think it should, I use the value of the parameter to test the
content of the "state" element, where in the one that
produces the output I want, I use the literal string 'WI'.
Thanks.
--
Charles Knell
cknell(_at_)onebox(_dot_)com - email
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