[xsl] Nested for-each-group and current-group()

Hi All,

 

I have this as my input XML:

 

<?xml version="1.0" encoding="UTF-8"?>

<root>

    <topic>

        <para>topic 1</para>

        <subtopic>

            <para>subtopic 1a</para>

        </subtopic>

        <subtopic>

            <para>subtopic 1b</para>

        </subtopic>

        <subtopic>

            <para>subtopic 1c</para>

        </subtopic>

        <subtopic>

            <para>subtopic 1d</para>

        </subtopic>

    </topic> 

    <topic>

        <para>topic 2</para>

    </topic>

    <topic>

        <para>topic 3</para>

        <subtopic>

            <para>subtopic 3a</para>

        </subtopic>

        <subtopic>

            <para>subtopic 3b</para>

        </subtopic>

        <subtopic>

            <para>subtopic 3c</para>

        </subtopic>

    </topic>

</root>

 

My goal is to convert adjacent topic elements into an <ol> element and
adjacent subtopic elements into a <ul> element.

 

<?xml version="1.0" encoding="UTF-8"?>

<root>

    <ol>

        <li>

            <para>topic 1</para>

            <ul>

                <li>

                    <para>subtopic 1a</para>

                </li>

                <li>

                    <para>subtopic 1b</para>

                </li>

                <li>

                    <para>subtopic 1c</para>

                </li>

                <li>

                    <para>subtopic 1d</para>

                </li>

            </ul>

        </li>

        <li>

            <para>topic 2</para>

        </li>

        <li>

            <para>topic 3</para>

            <ul>

                <li>

                    <para>subtopic 3a</para>

                </li>

                <li>

                    <para>subtopic 3b</para>

                </li>

                <li>

                    <para>subtopic 3c</para>

                </li>

            </ul>

        </li>

    </ol>

</root>

 

I am using nested xsl:for-each-group constructs but I don't get the inner
<ul> elements. I think I am incorrect in my use of current-grouping-key() or
current-group() on the inner group. Thanks in advance.

 

<?xml version="1.0" encoding="UTF-8"?>

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";

    xmlns:xs="http://www.w3.org/2001/XMLSchema";

    exclude-result-prefixes="xs"

    version="2.0">

    

    <xsl:output indent="yes"/>

    

    <xsl:template match="/root">

        <root>

            <xsl:for-each-group select="*" group-adjacent="if(self::topic)
then 1 else 0">

                <xsl:choose>

                    <xsl:when test="current-grouping-key()=1">

                        <ol>

                            <xsl:for-each-group select="current-group()"
group-adjacent="if(self::subtopic) then 1 else 0">

                                <xsl:choose>

                                    <xsl:when
test="current-grouping-key()=1">

                                        <ul>

                                            <xsl:apply-templates
select="current-group()"/>

                                        </ul>

                                    </xsl:when>

                                    <xsl:otherwise>

                                        <xsl:apply-templates
select="current-group()"/>

                                    </xsl:otherwise>

                                </xsl:choose>

                            </xsl:for-each-group>

                        </ol>

                    </xsl:when>

                    <xsl:otherwise>

                        <xsl:apply-templates select="current-group()"/>

                    </xsl:otherwise>

                </xsl:choose>

            </xsl:for-each-group> 

        </root>

    </xsl:template>

    

    <xsl:template match="topic|subtopic">

        <li><xsl:apply-templates/></li>

    </xsl:template>

    

    <!-- Identity transform. -->

    <xsl:template match="@*|node()">

        <xsl:copy copy-namespaces="no">

            <xsl:apply-templates select="@*|node()"/>

        </xsl:copy>

    </xsl:template>

    

</xsl:stylesheet>

 

Rick

 

Rick Quatro

Carmen Publishing Inc.

rick(_at_)frameexpert(_dot_)com

585-729-6746

www.frameexpert.com/store/

 

 

 
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