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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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Three 1’s in sequence indicates a bar three times as thick as a single 1 bar. Especially the ASCII char of value 0 and of value 95 and above may be defined differently in the font that is installed. Bar code print quality test specification.

At the end of a string, delaying the transition to code set C until there are an even number of digits remaining avoids an extra symbol. The FNC x codes are used for special purposes. This section gives the compression strategy. However, this feature is not widely supported. Code specifies a combination of 6 alternating bars and spaces 3 of each for each symbol.

The Algorithm Design Manual 2nd ed. Search all products by. It specifies the symbology identifier prefix strings for Code symbols. Barcode reader Barcode printer. You may experience issues viewing this site in Internet Explorer 9, 10 or Verfahren der automatischen Identifikation und Datenerfassung.

For example, in the following table, the code variant A checksum value is calculated for the alphanumeric string PJJC:. The “Code A”, “Code B” and “Code C” symbols cause all future symbols to be interpreted according to the corresponding subcode. Within each code set, some of the data code points are reserved for shifting to one of the other two code sets.

BS ISO/IEC 15417:2007

In the past, symbology specifications were developed and published by a number of organizations, resulting in certain instances in conflicting requirements for certain symbologies. Manufacturers of bar code equipment and users of bar code technology require publicly available standard symbology specifications to which they can refer when developing equipment and software. Code is one such symbology.


Consider the string ” 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. Reading the stop pattern left to right is the stop pattern followed by a 2-unit barand reading the stop pattern right to left is the reverse stop pattern followed by a 2-unit bar.

The stop pattern permits bidirectional scanning. Monday to Friday – 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. Please download Chrome or Firefox or view our browser tips.

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. Reporting just the lengths of each run gives 1, 1, 1, 3, 2, 3, thereby producing a widths value of For example, using the patternthe run lengths are 1 digit 11 digit 01 digit 13 digit 02 digit 13 digit 0.

It is calculated by summing the start code ‘value’ to the products of each symbol’s ‘value’ multiplied by its position in the barcode string.

Two of the symbols are used for stop end-of-barcode indication, stop and reverse stop. For the end user, Code barcodes may be generated by either an outside application to create an image of the barcode, or by a font-based barcode solution. FNC1 at the beginning of a bar code indicates a GS bar code which begins with a 2- 3- or 4-digit application identifier assigned by the Uniform Code Councilwhich explains the following digits.

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Code – Wikipedia

Each symbol in the barcode is composed of three bars and three spaces. The initial subset 154417 selected by using the appropriate start symbol. It specifies Code symbology characteristics, data character encodation, dimensions, decoding algorithms and the parameters to isk defined by applications. 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.


Therefore this version remains current. The faster, easier way to work with standards.

All widths are multiples of a basic “module”. In barcode fonts, the final bar is generally combined with the stop symbol to make a wider stop pattern. The width of each bar or space may be 1, 2, 3 or 4 units modules. Learn more about the cookies we use and how to change your settings. The start symbol and first encoded symbol are in position 1.

There are numerous methods of encoding information in bar code form, known as symbologies. Code 39 bar code symbology specification. Views Read Edit View history.

For the beginning and ending part of the string, switching to code set C is not effective. When the stop pattern is read right-to-left, the reverse stop symbol followed by a 2-module bar is recognized. The rules defining the translation of characters into bar and space patterns, and other essential features of each symbology, are known as the symbology specification. The minimum width of the Quiet Zone to the left and right of the Bar Code is 10x, where x is the minimum width of a module.

Using code set C saves one symbol per two digits, but costs a mode-shift symbol to enter and exit the set. The checksum is computed over the symbol values, without regard for which code set is active at the time.

The widths value is derived by counting the length of each run of 1’s then 0’s in the pattern, starting from the left.