Recommended docbook element for a "Problems section"

[Erik Leunissen <elns@xs4all.nl>]

Hi all,

I'm in the process of writing an educational textbook. The textbook is a 
docbook book, containing several chapters. Each chapter contains several 
sections with "explained content", a "Problems section" and a 
bibliography. Like the sections, the "Problems section" and the 
bibliography occur at the same level just below a chapter.

(B.t.w. the word "section" in "Problems section" is just a matter of 
speak, not meant to be a docbook element, not yet anyway)


Sample document structure:

--
Titlepage
Table of contents
Preface
Chapter 1
  1.1 First section
  1.2 Second section
  1.3 Third section
  ...
  Problems
  Bibliography

Chapter 2
...

Appendices
--

My question relates to the "Problems" section in each chapter. Like the 
bibliography it must not have a label, but must occur in the table of 
contents.

I've been looking for a docbook element for such a "Problems section", 
and I have difficulty finding an appropriate one:
- I can't make it a docbook section because these are processed to 
display a label.
- a Q&A set seems inappropriate since there are only questions (which 
are not "Frequently asked" anyway; and answers are not supposed to be 
provided in the same structural element)
- I've been thinking about using a section element with a dedicated role 
attribute, that triggers customized processing, but that's just a wild 
idea for now.


In case it matters: my processing toolchain is:
  docbook5 XML | xsltproc | fop | pdf


I'd appreciate very much any suggestions,

Erik Leunissen.
--