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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>
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