Talk:Global Trade Item Number

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Untitled[edit]

Prefixes:

It seems to be the list of prefixes is the list of EAN (now GTIN-13) prefixes. If I understand correctly, the list of prefixes for GTIN (GTIN-14) should be

   * 0020 - 0029 Restricted distribution (GS1 MO defined)
   * 0040 - 0049 Restricted distribution (GS1 MO defined)
   * 0050 - 0059 Coupons
   * 0200 - 0299 Restricted distribution (GS1 MO defined)
   * 0977 Serial publications (ISSN)
   * 0978 - 0979 Bookland (ISBN)
   * 0980 Refund receipts
   * 0981 - 0982 Common Currency Coupons
   * 0990 - 0999 Coupons

Can someone confirm?

Cagnol 13:50, 10 May 2006 (UTC)

GTIN country prefix is 3 digits, not 2. this webpage confirms this and the above statement http://www.gs1.org/barcodes/support/prefix_list


Book abuse of GTIN in UPCs (the EANS are fine)[edit]

Books that have UPCs (rather than or in addition to EAN barcodes) often seem to violate the GTIN concept.

For example: I'm looking at a book right now (picked one up randomly) that has an ISBN-10 of:1-57566-324-4, Therfore the ISBN-13 is 9781575663241. It has a list price of 22 USD.

It has 2 barcodes, both using the 5 digit extention code. The one is EAN+5: 9781575663241+52200 The other is a UPC-A+5:752550022000+00324 If that is rendered as a bar code you will notice the second group of digits is "02200". That is the price. the Extention gives the title code from the ISBN. Apparently the book publisher claims that all its books with a list price of 22 USD are in fact the same product, as it has assigned the same GTIN-12 to all of them (752550022000).

What an absurd practice. The only logical explanation i have come up with is that they wanted to make it very difficult to individually reprice books if your equipment will only read UPCs, and does not support the extension codes.

With the EAN system the extension code is not necessary to uniquely identify the product, which is how it should be.

NB: The extension code is normally used to hold recommended retail price (in country of publication) for books; it holds the issue number (day of month or week in year or month) for ISSN (magazines, newspapers etc), newspapers usually have more than one barcode to identify days of the week when price is different (e. g. Sat, Sun etc).

ISSNs[edit]

ISSNs are 8 digits + check digit = 9 digits. There's a three-digit country code for them; that makes 12 digits. How does one construct a GTIN-13 from that? -- Beland 21:48, 18 July 2007 (UTC)

See above: country code is always 3 digits for EAN.

ISMN[edit]

From Summer 2008, ISMN10 (sheet music) codes can be transcoded to EAN13, prefix 979 (similar to bookland/musicland code). So, ISMN M-nnnnnnnnC (hypens would be inserted to highlight publisher code, check digit uses GS1 algorithm so is always a digit, rather than ISNB algortihm) would be 9790 (M replaced by 0) nnnnnnnnC (checkdigit is the same). New ISMN publisher prefixes are issued in EAN13 format only. Note this means that the 979 extension for ISNB13 is shared with ISMN. http://ismn-international.org/download/GuidelinesGeneral.pdf

Korean Article Number (KAN)[edit]

There should be a link out to a article stub for KAN modelled on JAN. JAN and KAN predate GTIN/GS1 sufficiently that they have their own identity although bothhave been wholly subsumed into EAN system. — Preceding unsigned comment added by 78.105.60.169 (talk) 12:18, 17 September 2011 (UTC)

Reduced to Clear (Repricing) labels in retail[edit]

A number of UK-based retailers (certainly the top 5 grocery, and one major home improvement chain) use an Code128 label to reprice items in store by the each, for example, to reduce the price of a specific item because it is damaged or nearing it's sell buy/use by/best before date. The label is usually self-adhesive and stuck over the products barcode, with additional copies being stuck on the front of the product to alert the customer to the damage/reduction

The label usually has a number below it, to allow manual keying in case it does not scan (there is a significant rate of scan failure due to dirt, thermal fade, or printer/stationery inaccuracies).

The number format is retailer specific, but often starts with starts with a 9, and usually embeds the GTIN and price in a fairly obvious way. It sometimes also embeds an do not sell after day of week or day of month which will be checked by the cash register.

How to incorporate this into these pages? — Preceding unsigned comment added by 78.105.60.169 (talk) 12:42, 17 September 2011 (UTC)