DOCBOOK: markup of hyphen chars

[Michael Wiedmann <mw@miwie.in-berlin.de>]

Is there a way to markup the different "hyphen characters" like the
ones we are used to in LaTeX (-, --, ---)?

Though there is currently no support in DSSL or XSL stylesheets
and the corresponding backends, it would be good to be able to
markup these characters.

Michal
-- 
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