Code is a high-density linear barcode symbology defined in ISO/IEC It is used for alphanumeric or numeric-only barcodes. It can encode all. ISO/IEC Code bar code symbology specification. ISO/IEC Information technology — Automatic identification and data capture. BS ISO/IEC Information technology. Automatic identification and data capture techniques. Code bar code symbology.

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Code bar code symbology specification Status: Each bar and space is 1 to 4 modules wide, and the symbols are fixed width: Please improve this article by removing excessive or inappropriate external links, and izo useful links where appropriate into footnote references.

Barcode reader Barcode printer. The width of each bar or space may be 1, 2, 3 or 4 units modules. For instance, encoding the ASCII character “0” can be viewed aswhere a sequence of 1’s is a bar and a sequence of 0’s is a space.

The optimal encoding can be found using a dynamic programming jso. Views Read Edit View history. Despite its name, Code does not have distinct symbols, so it cannot represent code points directly. Code set C is used to efficiently encode digit strings. We use cookies to make our website easier to use and to better understand your needs. Three 1’s in sequence indicates a bar three times as thick as a single 1 bar. January Learn how and when to remove this template message.

Especially the ASCII char of value 0 and of value 95 and above may be defined differently in the font that is installed. Learn more about the cookies we use and how to change your settings.


The checksum is computed over the symbol values, without regard for which code set is active at the time. For the purpose of computing the check symbol, the shift and code-switch symbols are treated the same as any other symbol ie the bar code. It is calculated by summing the start code isso to the products of each symbol’s ‘value’ multiplied by its position in the barcode string.

Optimizing the length of the resulting barcode is important when barcode readers are used which must uso the entire barcode image at once in order to read it, irc as common laser scanners. Graphical symbols for use on information technology and telecommunications technical drawings and in relevant technical product documentation.

The stop pattern permits bidirectional scanning. Each bar or space is 1, 2, 3 or 4 units wide, the sum of the widths of bars must be even 4, 6 or 8 unitsthe sum of the widths of the spaces must be odd 3, 5 or 7 unitsand total 11 units per symbol.

BS ISO/IEC 15417:2007

Using code set C saves one symbol per two digits, but costs a mode-shift symbol to enter and exit the set. Search all products by. The following table details the widths associated with each bar and space for each symbol. Take the smart route to manage medical device compliance. Code is one such symbology.

Automatic identification and data capture techniques. Code specifies a combination of 6 alternating bars and spaces 3 of each for each symbol. Each symbol consists of three black bars and three white spaces of varying widths. Proof sent to secretariat or FDIS ballot initiated: The “Shift” symbol switches a single following symbol’s interpretation between subcodes A and B. The Algorithm Design Manual 2nd ed. When the stop pattern is read left-to-right the usual casethe stop symbol followed by a 2-module bar is recognized.


Retrieved from ” https: For example, given the string “xy23”, savings on barcode length using code set C are achieved only if it is applied to middle part of the string. Code 39 bar code symbology specification. There are possible unit wide symbols, and the code uses all possible symbols. This article’s use of external links may not follow Wikipedia’s policies or guidelines.

Bar code print quality test specification. It specifies Code symbology characteristics, data character encodation, dimensions, decoding algorithms and the parameters to be defined by applications. However, this feature is not widely supported.

The start symbol and first encoded symbol are in position 1. It specifies isoo symbology identifier prefix strings for Code symbols.

There will always be 6 runs and the lengths of these 6 runs form the Widths value. If two FNC4s are used consecutively then all following characters will be treated as such, up to the end of the string or another pair 1547 FNC4s.

Therefore this version remains current.

Code – Wikipedia

Thus, it only worth using if there are enough consecutive digits. Although code set C uses one code symbol to represent two digits, it does not always produce a more compact code than code sets A or B. If two consecutive ‘FNC4’ characters are used, all following data characters are extended ASCII characters until two further consecutive ‘FNC4’ characters are encountered or the end of the symbol is reached.