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[xsl] about using templates

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hi, prehaps it is not even a valid question, but i was wondering how i selectively use the data store in the xsl:template (not from the xml document but from an external xsl document)?

prehap it is easier to explain this with an example... suppose there are 2 xsl stylesheet (XSL1 and XSL2)
in XSL1 it contain the following: -

<xsl:template name="key1">fault/unit=key234HrsWft</xsl:template>
<xsl:template name="key2">data</xsl:template>
<xsl:template name="key3">some key</xsl:template>

in XSL2 i will call the following template to retrieve the values store in the three key template: -

<xsl:template name="query_str">
<p><xsl:call-template name="key1"/></ip> and
<p><xsl:call-template name="key2"/></p> and <p><xsl:call-template name="key3"/></p> and </xsl:template>
so the output result should be: - <p>key234HrsWft</p> and <p>data</p> and <p>soome key</p>

the problem is, if key2 contain no data (ie <xsl:template name="key2"></xsl:template>) the output will becoming <p>key234HrsWft</p> and <p></p> and <p>soome key</p>
therefore, i was wondering, how could i selectively add the " and " string into the output file (e.g. only add the " and " string if key2 is not empty). i have tried using <xsl:if test="key2!=''"> but it does not work, so i was wondering is there are ways to get round this problem? any suggest would be a great help

Many thanks

Regards
Kit

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