I'm going to guess that it's because 59x fields are defined for local use:
http://www.loc.gov/marc/bibliographic/bd59x.html
...but someone from LC should be able to confirm.
-Jon
--
Jon Stroop
Metadata Analyst
Firestone Library
Princeton University
Princeton, NJ 08544
Email:
: Thursday, May 19, 2011 11:07 AM
To: CODE4LIB@LISTSERV.ND.EDU
Subject: Re: [CODE4LIB] MARCXML to MODS: 590 Field
I'm going to guess that it's because 59x fields are defined for local use:
http://www.loc.gov/marc/bibliographic/bd59x.html
...but someone from LC should be able to confirm