From 4b6623a7e8f0f0116ff68ebfd4c98830fe59419d Mon Sep 17 00:00:00 2001 From: Robert Haas Date: Tue, 19 Oct 2010 22:46:55 -0400 Subject: [PATCH] Add some caveats to the contrib/isn docs. --- doc/src/sgml/isn.sgml | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/doc/src/sgml/isn.sgml b/doc/src/sgml/isn.sgml index d1d98fe1b8..3735988db1 100644 --- a/doc/src/sgml/isn.sgml +++ b/doc/src/sgml/isn.sgml @@ -10,8 +10,15 @@ The isn module provides data types for the following international product numbering standards: EAN13, UPC, ISBN (books), ISMN - (music), and ISSN (serials). Numbers are validated on input, and correctly - hyphenated on output. + (music), and ISSN (serials). Numbers are validated on input according to a + hard-coded list of prefixes; this list of prefixes is also used to hyphenate + numbers on output. Since new prefixes are assigned from time to time, the + list of prefixes may be out of date. It is hoped that a future version of + this module will obtained the prefix list from one or more tables that + can be easily updated by users as needed; however, at present, the + list can only be updated by modifying the source code and recompiling. + Alternatively, prefix validation and hyphenation support may be + dropped from a future version of this module.