what processor is using this stylesheet

Sorry, yet another question from me!

Is there something one can put on a test= to determine what processor is
running, e.g. in English, 
  <xsl:choose>
   <xsl:when test="saxon is being used to process this stylesheet">
     <-- [do X] -->
    </xsl:when>
    <xsl:otherwise>
     <!-- otherwise it is xt or xalan or etc. -->
     <!-- do Y -->
    </xsl:otherwise>
  </xsl:choose>

-carole
- - - - - - - - - - - - - - - - - - - - - - - - - 
Carole E. Mah                Carole_Mah@xxxxxxxxx
         Senior Programmer/Analyst
  Brown University Scholarly Technology Group
            phn 401-863-2669
            fax 401-863-9313
         http://www.stg.brown.edu/
 personal: http://www.stg.brown.edu/~carolem/


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