GTIN

• http://en.wikipedia.org/wiki/Global_Trade_Item_Number
• http://en.wikipedia.org/wiki/List_of_GS1_country_codes

Allocation rules

From GTIN Allocation Rules Feb 2007:

A separate unique GTIN is required whenever any of the pre-defined characteristics of an item are different in any way that is relevant to the trading process. The guiding principle is if the customer is expected to distinguish a new trade item from an old trade item and purchase accordingly, a new GTIN should be assigned.

relation with other codes

http://www.tango.info/00724383741328

 TIN-14 00724383741328
GTIN-14 00724383741328
 EAN-13  0724383741328
 UPC-12   724383741328 

• http://www.upcdatabase.com/barcode.pl?ean13=0724383741328
• http://www.upcdatabase.com/barcode.pl?upc=724383741328

finding EAN

• http://www.imusic.dk/
  • Search API giving EAN on one click, e.g. http://www.imusic.dk/page/search?combined=&search=S%F8g+i+kataloget&_form=searchForm&artist=Canaro&title=Desde+El+Alma
• http://www.allcd.us
  • Search UI works on single words e.g. http://allcd.us/search.php?word=Canaro&node=Music
  • ... but fails on multiple words e.g. http://allcd.us/search.php?word=Canaro+%22Nobleza+de+Arrabal%22&node=Music
  • Search API giving EAN direct e.g http://www.google.com/search?hl=en&q=site%3Aallcd.us+intitle%3AMusic+EAN+Canaro+%22Nobleza+de+Arrabal%22

look up via EAN

• http://amazon.com/s/?field-keywords=8427328131162
• http://www.google.com/products?as_q=0724383741328