Resize (proportionally) an image when placing XML using XSLT on to InDesign CS5, IF image is >200px wide

Any/all help appreciated, thanks!

Currently the code in XSLT looks like this:

<xsl:if test="logo[.!='']">
   <logo>
      <xsl:attribute name="href">file://logos/<xsl:value-of select="logo"/></xsl:attribute>
   </logo>
   <xsl:text></xsl:text>
</xsl:if>

Update from comments

Desired result is to get XSLT to resize/downsize images, then place them in InDesign CS5 across columns (think membership directory with each member having a picture pf various dimensions, but in the final InDesign output we want them to appear no bigger than 200 px wide). I guess the question is, is there any way XSLT can 'sense' that a jpg is bigger than 200 px wide, and using a conditional statement, actually proportionately size it down to 200 px and dynami开发者_C百科cally place in InDesign CS5? The XML file doesn't come with the image height and width info

XSLT doesn't have a built-in library for performing operations on images. You'll have to create one using whatever capabilities your chosen XSLT processor provides for defining extension functions.