Help with Choose in xsl - newbee to xml

[freddo99]

I have an xsl file with the following two lines

     <xsl:attribute name="width"><xsl:value-of select="imagesize/@width"/></xsl:attribute>
      <xsl:attribute name="height"><xsl:value-of select="imagesize/@height"/></xsl:attribute>

I want to test for the value of imagesize/@width and set the values of width and height if the test condition is meet.

I have tried the following without success

<xsl:choose>
  <xsl:when test="350 &gt; imagesize/@width">
        <xsl:attribute name="width"><xsl:value-of select="420"/></xsl:attribute>
        <xsl:attribute name="height"><xsl:value-of select="560"/></xsl:attribute>
  </xsl:when>
  <xsl:otherwise>
        <xsl:attribute name="width"><xsl:value-of select="imagesize/@width"/></xsl:attribute>
        <xsl:attribute name="height"><xsl:value-of select="imagesize/@height"/></xsl:attribute>
  </xsl:otherwise>
</xsl:choose>

I have also tried

<xsl:when test="350 &gt; <xsl:value-of select=<xsl:value-of-select='imagesize/@width'/>">

Can someone please help?

[Alex Vincent]

Can you show us the XML you're trying to apply these XSLT documents to?

[freddo99]

The xml file contains the following

<template description="Holidays - Slideshow" version="1.0.1">
<home_page fname="index.htm" />
<stylesheet fname="toc.xsl" type="toc" output="toc.xml" post_transform_exe="utils\SplitHtml.exe" post_transform_args="-d %d %i" />
<stylesheet fname="single.xsl" type="image_page" output="single.xml" post_transform_exe="utils\SplitHtml.exe" post_transform_args="-d %d %i" />
...
...
</template>

The section I am trying to alter changes the width and height of slideshow images

[Alex Vincent]

The <stylesheet> tags make no sense. I was under the impression XSLT transformations needed to be before the document's root element, and written as <?xml-stylesheet ... ?>.