[jeberle]

I've often wondered if PostScript or PDF contained the roots of a very good config language. Perhaps it simply is (PDF docs at least) but nobody regards it as such.

My guess is the RPN nature would be a no-go for many people. Nevertheless: comments, dicts, arrays, good string syntax, numerics, binary data, etc. Maybe that makes it too complicated.

[zzo38computer]

PostScript is not so bad as a programming language, and it has a binary format as well as a text format, although the limits of numbers and some other things can be too small for many applications. The syntax of TER is based on PostScript (although it is not actually compatible, for many reasons; for example, the syntax "1.0" does not denote a number in TER, but "+1.0" does).