Hi, Tod. No idea how well it works, but there is a perl Text::SuDocs module on CPAN: http://search.cpan.org/~cfouts/Text-SuDocs-0.014/lib/Text/SuDocs.pm Might be something you could reverse-engineer for another platform. wayne -----Original Message----- From: Code for Libraries [mailto:[log in to unmask]] On Behalf Of Tod Olson Sent: Wednesday, February 20, 2013 10:09 AM To: [log in to unmask] Subject: [CODE4LIB] SuDoc normalization for sorting C4L, Does anyone have some code they'd be willing to share that normalizes SuDoc numbers for sorting? Best, -Tod Tod Olson <[log in to unmask]<mailto:[log in to unmask]>> Systems Librarian University of Chicago Library