What are the allowed characters in a Clojure keyword?

Question

I am looking for a list of the allowed characters in a clojure keyword. Specifically I am interested to know if any of the following characters are allowed: -

Answer 1

From that list, the reader certainly allows - and _, but / has a special meaning as the delimiter between namespaces and symbol names. Period (which you didn't ask about) is problematic inside symbol names as well, since it is used in fully-qualified Java class names.

As far as Clojure idiom goes, - is your best friend in symbol names. It takes the place of camel case in Java or the underscore in Ruby.