This might come in handy one day: Defining ISBN in XML Schema [.xsd document]. Shit loads of documentation too, so if you've ever wanted to know what all the numbers mean, or how the number-space is broken up, or how the checksum is calculated, it's here.
This might come in handy one day: Defining ISBN in XML Schema [.xsd document]. Shit loads of documentation too, so if you've ever wanted to know what all the numbers mean, or how the number-space is broken up, or how the checksum is calculated, it's here.