[xsl] Converting a Table of Contents to an index

[Jim Freeman <jim@xxxxxxxxxxxxxxxx>]

I am trying to invert a tree - specifically to create an index for a 
document by pulling the leaves to the top and grouping them.  A classic 
problem that I am just having a mental block on . . . ARGHHHH!!!

I won't begin to include all the XSL attempts - but will include the source 
and target . . . .

Here is the source XML:

<?xml version="1.0" encoding="UTF-8"?>
<book>
        <chapter title="Chapter 1">
                <para>
                        <text>This is a trip overview</text>
                        <index>travel</index>
                        <index>overview</index>
                </para>
                <para>
                        <text>This is about planning</text>
                        <index>travel</index>
                        <index>planning</index>
                </para>
                <para>
                        <text>This is about packing</text>
                        <index>travel</index>
                        <index>packing</index>
                </para>
        </chapter>
        <chapter title="Chapter 2">
                <para>
                        <text>This is about travel in europe</text>
                        <index>europe</index>
                        <index>travel</index>
                </para>
        </chapter>
</book>

And here is the output XML:

<?xml version="1.0" encoding="UTF-8"?>
<index>
        <entry>
                <text>travel</text>
                <referenceChapter name="Chapter 1">
                        <referencePara>1</referencePara>
                        <referencePara>2</referencePara>
                        <referencePara>3</referencePara>
                </referenceChapter>
                <referenceChapter name="Chapter 2">
                        <referencePara>1</referencePara>
                </referenceChapter>
        </entry>
        <entry>
                <text>overview</text>
                <referenceChapter name="Chapter 1">
                        <referencePara>1</referencePara>
                </referenceChapter>
        </entry>
        <entry>
                <text>planning</text>
                <referenceChapter name="Chapter 1">
                        <referencePara>1</referencePara>
                </referenceChapter>
        </entry>
        <entry>
                <text>packing</text>
                <referenceChapter name="Chapter 1">
                        <referencePara>3</referencePara>
                </referenceChapter>
                <entry>
                        <text>europe</text>
                        <referenceChapter name="Chapter 2">
                                <referencePara>1</referencePara>
                        </referenceChapter>
                </entry>
        </entry>
</index>


















James C. Freeman
mailto:jim@xxxxxxxxxxxxxxxx
Voice: 415 971 6541
Fax: 413 622 8955


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