Potential typo in Bobs Book

Hi,

I think an example in Bobs book might have a small typo:

http://www.sagehill.net/docbookxsl/PrintToc.html

<xsl:attribute-set name="toc.line.properties">
  <xsl:attribute name="font-size">10pt</xsl:attribute>
  <xsl:attribute name="font-weight">
    <xsl:when test="self::chapter | self::preface |
self::appendix">bold</xsl:when>
    <xsl:otherwise>normal</xsl:otherwise>
  </xsl:attribute>
</xsl:attribute-set>

I think the <xsl:choose> is missing about the <xsl:when>.

At least that made the example work for me.

Best regards, Lars