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[xsl] how to assign a NULL to a variable?
Subject: [xsl] how to assign a NULL to a variable?
From: "shi wudao" <shiwudao@xxxxxxxxxxx>
Date: Thu, 26 Jul 2007 14:37:33 +0000
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HI, guru
Do you know how to assing a NULL to variable in XSL1.0? Thank you.
My problem is I want write a code as follows, but I do not know how to set
a NULL value at the following "otherwise" case:
<xsl:variable name="myvar">
<xsl:choose>
<xsl:when test="conditon a">
<xsl:value-of selcet="xxx"/>
</xsl:when>
<xsl:when test="conditon b">
<xsl:value-of selcet="xxx"/>
</xsl:when>
<xsl:otherwise>
<!-- WANT TO return a NULL value here!!!!! But It return a "" not
NULL -->
</xsl:otherwise>
</xsl:choose>
</xsl:variable>
<xsl:if test="$myvar">
.....
</xsl:if>
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