Hi,
I have a problem using predicate expressions where I compare
an attribute in
the node-set to an attribute in the "current node-set". I
have problems
explaing this, so here's an example:
xml file:
<?xml version="1.0" encoding="ISO-8859-1"?>
<?xml-stylesheet type="text/xsl" href="paytest.xsl"?>
<payments>
<oldpayments>
<oldpayment payno="1" amount="100" ref="a" />
<oldpayment payno="2" amount="200" ref="b" />
<oldpayment payno="3" amount="300" ref="c" />
</oldpayments>
<newpayments>
<newpayment Payno="3" amount="300" />
<newpayment Payno="4" amount="300" />
</newpayments>
</payments>
xsl file:
<?xml version="1.0" encoding="ISO-8859-1"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
<xsl:output method="html"/>
<xsl:template match="/">
<html>
<head><title>test</title></head>
<body>
<xsl:apply-templates select="/payments/newpayments/newpayment" />
</body>
</html>
</xsl:template>
<xsl:template match="/payments/newpayments/newpayment">
Payno: <xsl:value-of select="@Payno"/>
Amount: <xsl:value-of select="@amount"/>
<xsl:if test="/payments/oldpayments/oldpayment/@payno = @Payno">
Ref: <xsl:value-of
select="/payments/oldpayments/oldpayment[(_at_)payno=@Payno]/@ref"/>
</xsl:if>
<br/>
</xsl:template>
Result in browser:
Payno: 3 Amount: 300 Ref:
Payno: 4 Amount: 300
I wanted the "ref" attribute to be printed, but I cant work
out how to match
the oldpayment payno with the newpayment Payno
keys might make your stylesheet more readable and easier to maintain,
<xsl:key name="old" match="oldpayments/oldpayment" use="@payno" />
<xsl:template match="newpayment">
Payno: <xsl:value-of select="@Payno"/>
Amount: <xsl:value-of select="@amount"/>
<xsl:if test="key('old', @Payno)">
Ref: <xsl:value-of select="key('old', @Payno)/@ref"/>
</xsl:if>
<br/>
</xsl:template>
But as Oleg said, using current() will get you there, too.
Cheers,
Jarno
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list