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can a variable hold a node set?

Subject: can a variable hold a node set?
From: Dmitri Snytkine <d.snytkine@xxxxxxxxx>
Date: Tue, 12 May 2009 09:36:38 -0400
 can a variable hold a node set?
I made a template for replacing strings with translated value using
the lookup table. The lookup table is included in the template, so I
can access it with
document('')

But since there usually over 10 strings that have to be translated on
a single page, I think it's not efficient to call document('') 10
times.
Is there a way to copy the value of document('')/*/trans:tr to a
variable and then access that variable 10 times?
Can a variable hold the node set?
Would this make sense?

If yes, then how can I change this template? By the way, this template
is not completely finished yet, I still have to put
a real test condition instead of testing for true()


    <xsl:template name="translateString">
        <xsl:param name="str"/>
        <xsl:param name="toLang"/>
        <xsl:param name="fallback" select="'en'"/>
		
        <xsl:choose>
            <xsl:when test="true()">
                <!-- <xsl:value-of select="$fallback"/> -->
				<xsl:value-of
select="document('')/*/trans:tr/tr_string[@str=$str]/*[name()=$toLang]"/>
            </xsl:when>
            <xsl:otherwise>
                <xsl:value-of select="'not found'"/>
            </xsl:otherwise>
        </xsl:choose>
    </xsl:template>

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