[xsl] Choose-When-Otherwise Nesting Problem

["Scott Downie" <sdownie at euronetworldwide dot com>]

Hello! We're diving into XSLT and climbing the learning curve.

At the moment, we're trying to become familiar with how to nest XSL commands. In
the example I've attached below, we want to take an incoming stream of XML and
display text depending upon what the incoming MaxAmount and MinAmount values
are. If a particular alert is associated with a MaxAmount or a MinAmount, we
want to display it. If both MaxAmount and MinAmount are null, we want to display
"Any Change". This process is repeated for all the incoming alerts with the
output format being altered (by the outermost choose condition) to display
alternating background colors in the output list.

When we actually try this, the very first MaxAmount or MinAmount is displayed.
But if the first value is a MaxAmount (for example), no subsequent MinAmounts
will appear. By the same token, if the first value is a MinAmount, no MaxAmounts
will appear. And even if all of the MaxAmount and MinAmount input is null, the
choose statement will never make it down to the otherwise branch that should
display "Any Change".

We must be nesting these commands in the wrong order, causing the process to
'stick' on the first MaxAmount or MinAmount. But we don't see a clear solution.

Any help would be appreciated.

Thanks!

Scott
========================================================================
<table>
<xsl:for-each select="transaction/alertDefinitionGroup/alertDefinition">
  <xsl:choose>
    <xsl:when test="position() mod 2> 0">
      <TR>
        <TD>
          <xsl:choose>
            <xsl:when test="MaxAmount!='null'">
              &gt; $<xsl:value-of select="MaxAmount" />
            </xsl:when>
            <xsl:when test="MinAmount!='null'">
              &lt; $<xsl:value-of select="MinAmount" />
            </xsl:when>
            <xsl:otherwise>Any Change</xsl:otherwise>
          </xsl:choose>
        </TD>
      </TR>
    </xsl:when>
    <xsl:otherwise>
      <TR>
        <TD>
          <xsl:choose>
            <xsl:when test="MaxAmount!='null'">
              &gt; $<xsl:value-of select="MaxAmount" />
            </xsl:when>
            <xsl:when test="MinAmount!='null'">
              &lt; $<xsl:value-of select="MinAmount" />
            </xsl:when>
            <xsl:otherwise>Any Change</xsl:otherwise>
          </xsl:choose>
        </TD>
      </TR>
    </xsl:otherwise>
  </xsl:choose>
</xsl:for-each>
</table>


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