docbook.xsl/fo different bullet symbols for itemizedlists

hi,

it seems like this isnt implemented in docbook.xsl yet.
snippet from xsl/fo/lists.xsl:

##########
<xsl:choose>
<xsl:when test="$itemsymbol='disc'">&#x2022;</xsl:when>
<xsl:when test="$itemsymbol='bullet'">&#x2022;</xsl:when>

<!-- why do these symbols not work? -->
<!--
<xsl:when test="$itemsymbol='circle'">&#x2218;</xsl:when>
<xsl:when test="$itemsymbol='round'">&#x2218;</xsl:when>
<xsl:when test="$itemsymbol='square'">&#x2610;</xsl:when>
<xsl:when test="$itemsymbol='box'">&#x2610;</xsl:when>
-->

<xsl:otherwise>&#x2022;</xsl:otherwise>
</xsl:choose>
###########

does anybody know how to fix this?


thx+cu

Sebastian