Interlude Chapters?

[Thomas Marti <thx.79@schweiz.org>]

Hello everyone

Is there a way to realize interlude chapters with Docbook?

Interludes are special chapters in-between the normal flow of chapters that have 
their own numbering and other names. You can find an example for this in the 
'Refactoring Workbook' by William Wake.

The ToC looks something like this:
(Taken from: http://www.xp123.com/rwb/)
--------------------------------------
Preface
Chapter 1 – Roadmap

Section 1 - Smells Within Classes
  Chapter 2 – The Refactoring Cycle
  Chapter 3 – Measured Smells
  Interlude 1 – Smells and Refactorings

  Chapter 4 – Names
  Chapter 5 – Unnecessary Complexity
  Interlude 2 – Inverses

  Chapter 6 – Duplication
....
--------------------------------------
('Sections' there seem to be what 'parts' are in Docbook, but that doesn't 
really matter here.)

I've looked through all the elements in 'Docbook: The Definitive Guide', but 
found nothing that I could use for this.

Any help is appreciated...


Bye, Thomas