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How to reset xsl parameter values?

Posted on 2004-09-15
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Last Modified: 2006-11-17
Good morning,

I am new to XML and XSL.  I am currently working on an XSL stylesheet and I need to know how to use a parameter locally and reset the values for use later.  Here is an example of what I'm trying to do:

<xsl:param name="querystring">not set yet</xsl:param>

<xsl:choose>
   <xsl:when test="@file_type='File'">
      <!--I want to set the "querystring" variable to a specific text value -->
   </xsl:when>
   <xsl:when test="@file_type='Date'">
      <!--I want to set the "querystring" variable to a specific text value-->
   </xsl:when>
   <xsl:otherwise>
      <!--I want to set the "querystring" variable to a specific text value-->
   </xsl:otherwise>
</xsl:choose>

<!--Then I want to use this variable to populate the HTML cell -->
<td><xsl:value-of select ="{$querystring}"/></td>  <!--Is that right?-->

Thanks
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Question by:dentyne
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1 Comment
 
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rdcpro earned 50 total points
ID: 12070133
Once a variable or parameter is set in XSLT, it is immutable and cannot be changed.  This is a consequence of the fact that XSLT is declarative.  Procedural programming techniques do not work well in XSLT--it's a lot different than things you might have tried before.  

Now, in a new instance of a template, a variable or parameter of the same name is a *new* variable or parameter, and can have a different value.  That's why we use recursion in XSLT to achieve this sort of thing.  For example:

http://rdcpro.com/Members/rdcpro/snippets/recursionandcounting/

What exactly are you trying to do with this?

Regards,
Mike Sharp
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