isbn13

ISBN13

Validation and correct formatting of an ISBN13 number.

Usage

require 'isbn13'

ISBN13.format('9789873303111') # => '978-987-33-0311-1'

ISBN13.valid?('978-987-33-0311-1') # => true
ISBN13.valid?('9789873303111') # => true

Formatting

A formatted ISBN13 number is on the form: GS1-GROUP-PUBLISHER-ITEM_NUMBER-CHECKSUM. The problem is, only GS1 and CHECKSUM has fixed lengths. The other components lengths vary according to the ranges assigned by the international/national ISBN agencies.

So, how can an ISBN13 be properly hyphenated? I've found RangeMessage.xml at http://www.isbn-international.org/page/ranges containing a list of UCC / Groups prefixes which I've used initially for formatting, but later found some errors hyphenating some isbns from Uruguay.

Later I've found a ISBN10 to ISBN13 converter which have all the ranges defined as arrays in Javascript. And that's the data I've used to hyphenate the isbns. There's a bin/make_isbn_ranges.rb which downloads/parses the page and creates a new data file to be used by the gem.

Installation

gem install isbn13

Author

Luis Parravicini

Changelog

• 2012-01-27 - Initial release

License

Copyright (c) 2012 Luis Parravicini

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.