EAN 5

ISBN with an EAN-5 addon (rightmost bars) representing $44.95 USD.

The EAN-5 is a supplement to the EAN-13 barcode used on books. It is used to give a suggestion for the price of the book.

First Digit	Description
5	$ US
6	$ Canada
4	$ New Zealand
3	$ Australia
0 & 1	British pounds

ISBN Encoding – Country and Currency Values Description

Value	Definition
50000	NACS Trade
59999	Price for $100 and more
90000	NACS New
90000-98999	For internal purposes (BISG recommend 90000 if no price is given)
99000-99989	Reserved for the industry market
99990-99999	Reserved for National Association of College Stores (NACS)
99990	NACS used
99991	NACS copies

Encoding

The Encoding of EAN-5 characters is very similar to that of the other European Article Numbers. The only difference is that the digits are separated by 01. The EAN-5 always begins with '01011.' Also, the R-Code is not used.

Encoding of the digits
Digit	L-code	G-code
`0`	`0001101`	`0100111`
`1`	`0011001`	`0110011`
`2`	`0010011`	`0011011`
`3`	`0111101`	`0100001`
`4`	`0100011`	`0011101`
`5`	`0110001`	`0111001`
`6`	`0101111`	`0000101`
`7`	`0111011`	`0010001`
`8`	`0110111`	`0001001`
`9`	`0001011`	`0010111`

The structure of the barcode is based on the checksum. In order to compute the checksum, multiply each of the digits by either 3 or 9, alternating each time. Then add them and then do a mod 10. So the checksum for 52495 is 1 based on the following calculations:

    5*3=15
    2*9=18
    4*3=12
    9*9=81
    5*3=15
  ----------
     141      %    10  = 1

Once you have the checksum digit, you can look up the structure in the following table. Note that the checksum digit is not in the final 5 digits, and is not intended to validate the 5 digit data, but rather to validate the reading of the EAN-5 overall.

Structure of EAN-5
Checksum	Structure
`0`	`GGLLL`
`1`	`GLGLL`
`2`	`GLLGL`
`3`	`GLLLG`
`4`	`LGGLL`
`5`	`LLGGL`
`6`	`LLLGG`
`7`	`LGLGL`
`8`	`LGLLG`
`9`	`LLGLG`

Example - encoding 52495
Start	5 (G)	Separator	2 (L)	Separator	4 (G)	Separator	9 (L)	Separator	5 (L)
`01011`	`0111001`	`01`	`0010011`	`01`	`0011101`	`01`	`0001011`	`01`	`0110001`

References

NACS Codes
Barcode Reference - Section 6.1.46.2
Barcode Writer - The basis for the barcode structure

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