Hi,

> 				<xsl:choose>
> 					<xsl:when 
> test="@duration=''">1</xsl:when>
> 					<xsl:when 
> test="@duration">1</xsl:when>

Sorry, this should of course be

  test="not(@duration)"

but you can remove this condition, because if the duration attribute doesn't exist, the first test will already return true.

Cheers,

Jarno