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and many-to-many element relationships

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I am wondering if the as-of-now  IE5b2 MIA <xsl:define-constant> will
resurface at some point.  I don't know if the syntax from the draft and
other current implementations would work with the (assumed) state of the
next draft reflected in the IE5b2 implementation, but does something
like this seem possible?

<TABLE>
<xsl:for-each select="//INFOUNIT">
   <xsl:define-constant name="IUID"><xsl:value-of
select="@ID"/></xsl:define-constant>
   <xsl:for-each select="//PRODUCT">
      <TR>
	<TD><xsl:value-of select="constant(IUID)"/></TD>
	<TD><xsl:value-of select="@MODELID"/></TD>
	<TD><xsl:value-of select="@MODELYR"/></TD>
	<TD><xsl:value-of select="MODELDESC"/></TD>
      </TR>
   </xsl:for-each>
</xsl:for-each>
</TABLE>

As it stands now, I use <xsl:eval>, but I believe there's a special
place in Hell for people who create XSL stylesheets like this, and I'd
prefer not to go there.  Also, there may be another, better way to do
this that I just haven't figured out:

<TABLE>
<xsl:for-each select="//INFOUNIT">
   <xsl:eval>/*define-constant*/ var IUID=getAttribute("ID");</xsl:eval>
   <xsl:for-each select="//PRODUCT">
   <TR>
	<TD><xsl:eval>/*constant*/IUID</xsl:eval></TD>
	<TD><xsl:value-of select="@MODELID"/></TD>
	<TD><xsl:value-of select="@MODELYR"/></TD>
	<TD><xsl:value-of select="MODELDESC"/></TD>
   </TR>
   </xsl:for-each>
</xsl:for-each>
</TABLE>

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