Nested lists insensitive to "list.block.spacing" attribute set

It appears that the following horizontal list spacing recipe:

<xsl:attribute-set name="list.block.spacing">
  <xsl:attribute name="margin-left">
    <xsl:choose>
      <xsl:when test="self::d:itemizedlist">0.2in</xsl:when>
      <xsl:when test="self::d:orderedlist">0.4in</xsl:when>
      <xsl:otherwise>0.6in</xsl:otherwise>
    </xsl:choose>
  </xsl:attribute>
</xsl:attribute-set>