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Nice one Sean, here's the drupal version http://drupal.org/project/isbn also contains code to distinguish country codes.... ap On 10/21/11 1:48 PM, "Sean Hannan" <[log in to unmask]> wrote: >GitHub search knows all: >https://github.com/zapnap/isbn_validation/blob/master/lib/isbn_validation. >rb > >-Sean > > >On 10/21/11 1:44 PM, "Kozlowski,Brendon" <[log in to unmask]> wrote: > >> Hi all. >> >> >> >> I'm somewhat surprised that I've never had to validate an ISBN manually >>up >> until now. I suppose that's a testiment to all of the software out >>there. >> >> >> >> However, I now find that I need to validate both the 10-digit and >>13-digit >> ISBNs. I realize there's also a check digit and a REGEX cannot check >>this >> value - one step at a time. Right now I just want to work on the REGEX. >> >> >> >> Does anyone know the exact specifications of both forms of an ISBN? The >>ISBN >> organization's website didn't seem to be overly clear to me. >>Alternatively, if >> anyone has a full working regular expression for this purpose I would >> definitely not mind if they'd be willing to share. >> >> >> >> The only thing I'm doing which is abnormal is that I am not requiring >>the >> hyphenation or spaces between numbers since some of this data will be >>coming >> from a system, and some will be coming from human input. >> >> >> >> >> Brendon Kozlowski >> Web Administrator >> Saratoga Springs Public Library >> 49 Henry Street >> Saratoga Springs, NY, 12866 >> [518] 584-7860 x217 >> >> Please consider the environment before printing this message. >> >> To report this message as spam, offensive, or if you feel you have >>received >> this in error, >> >> please send e-mail to [log in to unmask] including the entire contents and >>subject >> of the message. >> >> It will be reviewed by staff and acted upon appropriately.