Module Prelude.ISN

International Standard Numbers

Functions for manipulating ISBNs and ISSNs.

val norm : string -> string

(norm str) normalizes an ISN, by removing all insignificant punctuation (spaces, hyphens, etc), leaving only the significant characters (digits, 'x', and 'X').

module ISBN : sig ... end

International Standard Book Numbers (ISBNs)

module ISSN : sig ... end

International Standard Serial Numbers (ISSNs)