Add description to "parameters" xml element Add 2 levels "parameters".

slicer-4.0-module-parameterdescription.xsl

<?xml version="1.0" encoding="UTF-8"?>
<xsl:transform version="1.0"
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
 
  <xsl:output method="text" indent="yes" encoding="UTF-8"/>
  
  <xsl:template name="newline"><xsl:text>&#10;</xsl:text></xsl:template>
  
  <xsl:template match="/executable">
    <xsl:for-each select="parameters">
      <xsl:text>* '''</xsl:text><xsl:value-of select="label"/>'''<xsl:text>: </xsl:text><xsl:value-of select="description"/><xsl:call-template name="newline"/>
      <xsl:for-each select="*[descendant::label]">
        <xsl:text>** '''</xsl:text><xsl:value-of select="label"/>'''<xsl:text>: </xsl:text><xsl:value-of select="description"/><xsl:call-template name="newline"/>
        <xsl:for-each select="*[descendant::label]">
         <xsl:text>*** '''</xsl:text><xsl:value-of select="label"/>'''<xsl:text>: </xsl:text><xsl:value-of select="description"/><xsl:call-template name="newline"/>
        </xsl:for-each>
      </xsl:for-each>
    </xsl:for-each>
  </xsl:template>

</xsl:transform>

@jcfr, can you please integrate those changes into slicer.org wiki ?
This should display correctly the updated (r21908) doc of Models: http://www.slicer.org/slicerWiki/index.php?title=Documentation/Nightly/Modules/Models
Thanks.