DOCBOOK: SegmentedList in an IndexDiv

[Philippe MARTIN <pmartin@eridan-info.fr>]

Hello, 

I would like to understand the use of a SegmentedList in an IndexDiv.

The Docbook 4.1 DTD says that
<!-- SegmentedList in this content is useful for marking up permuted
     indices. -->
but I can't understand the sense of this. 

What are permuted indices ?
Could somebody give me a little example of its use ?

Thanks,
-- 
Philippe MARTIN
ERIDAN Informatique
http://www.eridan-info.fr