HOW TO USE <eval> IN select

Subject: HOW TO USE <eval> IN select
From: "Vassilis Grillas" <vgrillas@xxxxxxxxx>
Date: Wed, 9 Jun 1999 13:51:37 +0300
This is what I want to do:
1) call a script function and use its result in the filter of a select.
<xsl:attribute name="VALUE">
   <xsl:value-of select="/MAIN/DAT/*[@ID = <xsl:eval>Read_ID()</xsl:eval>]" /-->
The ie5 complained about the < which I changed to &lt; (> to &gt;)
Then it complained about unexpected token :
any suggestions?
2) Is there any form of variable in XSL that can be used to read and write data continuously (i.e. not just write once read many)
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