Traverse sub tree starting from a particular position

Hi all,

I am currently converting the following basic XML to FO:
<root>
    <section>
        <hrline /> Some text
    </section>
    <section>
        <hrdots />Some text <hrline />
    </section>
    <section>
       <p> Some Text <hrline /></p>
    </section>
    <section>
        Some Text
        <hrline />
        <p>
            <sub>Some Text <hrdots /></sub>        
        </p>      
        <sub>Some Text</sub>
    </section>
    <section>
        Some Text <hrline />         
       <img src="smile.gif" />
    </section>
</root>

In the resulting FO file each "section" element ends with an underline,
however there also elements that produce horizontal lines/dots. The idea is to
try and prevent the "section" underline from appearing when there is no text
or elements after the last hrline/hrdots. This is to prevent double lines from
appearing.

The best I have managed so far is to get the last hrline/hrdots element within
the section:
<xsl:template match="section">
    <xsl:variable name="underline">
        <xsl:choose>
            <xsl:when test="descendant::node()[self::hrdot or
self::hrline][last()]">
                <xsl:text>yes</xsl:text>
            </xsl:when>
            <xsl:otherwise>
                <xsl:text>no</xsl:text>
            </xsl:otherwise>
        </xsl:choose>
    </xsl:variable>
     <xsl:copy>
        <xsl:attribute name="underline-after">
            <xsl:value-of select="$underline" />
        </xsl:attribute> 
        <xsl:apply-templates select="node()|@*"/>
    </xsl:copy>       
</xsl:template>

What I need to next is traverse the rest of the "section" sub tree to detect
whether there is any more text or nodes appearing after that last
hrline/hrdots element. An example of the output should look like this:

<root>

    <section underline-after="yes">

        <hrline /> Some text

    </section>

    <section underline-after="no">

        <hrdots />Some text <hrline />

    </section>

    <section underline-after="no">

       <p> Some Text <hrline /></p>

    </section>

    <section underline-after="yes">

        Some Text

        <hrline />

        <p>

            <sub>Some Text <hrdots /></sub>        

        </p>      

        <sub>Some Text</sub>

    </section>

    <section underline-after="yes">

        Some Text <hrline />         

       <img src="smile.gif" />

    </section>

</root>

Any help or advice would be much appreciated.

Thanks