Container numbering can by customized by the mean of user functions.
That is, when a Scribe back-end2 is
to render the title of a container, such as a
a chapters or a section it calls a function that computes a string representing the
number of that block. The argument passed to this function is an
integer which is the actual number of the container.
For intance, setting the value of *scribe-chapter-numbering*
as shown above switches the chapter numbering to an
an alphabetic numbering instead of a numberical one:
(string (integer->char (+ (char->integer #\A) x -1)) #\))))
2: Not all back-ends
support this facility. In particular, the TeX back-end does not.