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[xsl] xsl: Actual output is "" : Expected output is 0

2008-08-20 04:09:28
XSLT: Version 1.0

Requriement: Converting xml to xml files.

XSL file:

<xsl:attribute name="nb-discount">
        <xsl:variable name="d" select="Charge[(_at_)Id='99']/@Amount -
Charge[(_at_)Id='125']/@Amount"/>
        <xsl:if test="$d">
                <xsl:value-of select="$d"/> <!-- Output is
nb-discount="" why the output is not 0 as expected-->
        </xsl:if>
</xsl:attribute>

XML file:

1) <Charge Id="99" Amount="12.60" CurrCode="EUR" Type="9" PT="P"/>
   <Charge Id="125" Amount="12.60" CurrCode="EUR" Type="5" PT="P"/>
   Actual Output: nb-discount=""
   Expected Output: nb-discount="0"
   
2) <Charge Id="99" Amount="12.60" CurrCode="EUR" Type="9" PT="P"/>
   <Charge Id="125" Amount="14.60" CurrCode="EUR" Type="5" PT="P"/>
   Actual Output: nb-discount="-2"
   Expected Output: nb-discount="-2"


Regards,
Raja 


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