passing twice in a node

Hello,

I have this simple XSL: 

<xsl:style-sheet>

<xsl:template match='element1'>
....
  <xsl:apply-templates/>
....
</xsl:template>

<xsl:template match='element2'>
....
  <xsl:apply-templates/>
....
</xsl:template>

<xsl:template match='element3'>
....
  <xsl:apply-templates/>
....
</xsl:template>

....

<xsl:template match='elementn'>
....
  <xsl:apply-templates'/>
....
</xsl:template>

</xsl:style-sheet>

and i have to test an identical attribute on each of this element.
in order not to repeat this test inside each template,
i would like to find a way to pass twice each element or node 

first pass: test the attribute and output specific HTML tag around this element
second pass: apply to the element its template in the XSL above outputting other HTML tags around it

thanks for helping.

Sébastien





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