Sorry :(, but the error message is correct. 
The element xsl:when does not have a 'match' attribute
it has a 'test' attribute. Your code should be : 

     <xsl:choose>
      <xsl:when test="@order='D'">DN</xsl:when>
      <xsl:otherwise>UP</xsl:otherwise>
     </xsl:choose>

Sara
> -----Original Message-----
> From: Walter Torres [mailto:walter@xxxxxxxxx]
> Sent: Tuesday, February 20, 2001 5:55 PM
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject:  Q on xsl:choose
> 
> 
> I seem to be stuck!
> 
> I have a small sample data set and am trying to use 
> xsl:choose and xsl:when.
> 
> (My code and data is below)
> 
> I get this error message...
> 
>    Attribute 'match' is invalid on 'xsl:when'
> 
> I have spent the last 2 days trying to see the error here.
> 
> Can anyone elighten me?
> 
> Thanks
> 
> Walter
> 
> PS: This is an extention to an example in Mr Kay's book.
> 
> 
> This is my data...
> 
> <books>
>  <titles>
>   <display colWidth='040' id='item' order='D'>Item</display>
>  </titles>
> </books>
> 
> This is my code
> 
> <xsl:template match='display'>
>   <th valign='top'>
>    <!-- define Default Sort Direction -->
>    <xsl:attribute name='ind'>
>     <xsl:choose>
>      <xsl:when match="@order='D'">DN</xsl:when>
>      <xsl:otherwise>UP</xsl:otherwise>
>     </xsl:choose>
>    </xsl:attribute>
>    <!-- Display Title -->
>    <xsl:value-of select='.'/>
>   </th>
> </xsl:template>
> 
> 
> 
> 
>  XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list
> 

 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list