I assume creating an empty title element does not meet your needs. Omitting a chapter
title raises a bunch of details.
1. Would you be marking the special chapter or title element with an attribute, such
as condition="foo", or will the stylesheet be trying to match on the text of the
title?
2. Would the chapter still be numbered, with just the title being blank, or do you
want the chapter numbering sequence to "go around" the chapter with the missing title?
3. Do you want the space preserved for the title on the chapter title page, or should
the chapter content start at the top?
4. Do you want the chapter omitted from the table of contents and PDF bookmarks?
Bob Stayton
Sagehill Enterprises
bobs@sagehill.net