Business::isbn::data contains the data for business::isbn to do its work. it is current as per the version of this package.

you can update business::isbn::data independently of this module as the various isbn organizations assign new publisher codes. the isbn agency lists these data on their website at http://www.isbn-international.org/, and a current rangemessage.xml file can be downloaded from http://www.isbn-international.org/agency?rmxml=1 and will be used by this module in preference of the included data when pointed to by the isbn_range_message environment variable.

note, that as a historical artifact, some countries are actually language areas. for instance, country code 2 is "french", and includes several french-speaking countries.