Conditions: <xsl:choose>

• xml:choose is necessary when you need an "otherwise"
• "otherwise" is like "else"
• Only one option is chosen, or else "otherwise"

  <xsl:choose>
  	<xsl:when test="ancestor(unorderedlist)">
  		*
  	</xsl:when>
  	<xsl:when test="ancestor(unorderedlist/unorderedlist)">
  		+
  	</xsl:when>
  	<xsl:otherwise>
  		-
  	</xsl:otherwise>
  </xsl:choose>