Barcode Glossary C

Barcode-Glossary

Barcode-Glossary C

  • Character

  • See "Character Set", "Data Character", "Symbol Character", "Human Readable Text".

  • Character Set, Code Set

  • The amount of alphabetic characters, digits and other characters that can be encoded in a certain barcode symbology.

  • Closed Application Environment (System)

  • An application usable only by a closed user group; usually within a single organization unit or as a result of a special agreement. Existing closed systems can only be used after a multilateral agreement between all participants.
    Compare: "Open Application Environment".

  • Continuous Code

  • A symbology with no intercharacter gaps, in which all spaces, therefore, contain information and in which the last element of a character borders directly on the first element of the following symbol character. Thus, all elements of the barcode are continuous data carriers.
    Compare: "Discrete Code".

  • Cyclic Code

  • A special form of data backup is the creation of backup information for data blocks according to a procedure called cyclic code (or polynomial backup). This backup information is attached to the blocks to be backed up and is designed to render identifiable any data corruption through misread, transmission errors, etc. (error recovery). They each consist of 6 to 16 bits and are formed with the aid of a special register of this width. All characters or bytes of one block are linked sequentially and according to a certain logic function with the relevant contents of this register, which is – at the beginning – loaded with binary zeros. After each linking operation of the register’s bits with the correspondent number of data block bits, the register’s contents are cyclically moved by one decimal place. This linking operation is repeated with the proximate 6 to 16 bits (according to register size) of the block to be backed up. After the entire block is processed, the register’s contents represent the backup information (check digit). As a rule, it is attached to the end of the block to be backed up. For checking the data block, the backup information is formed equally from the transferred data and compared with the attached data. Cyclic codes offer a much higher level of security against transmission errors than parity characters.

  • Cyclic Redundancy Check (CRC)

  • A form or check digit calculation for the Plessey Code.
    See also "Cyclic Code".

  • CCD (Charge-Coupled Device)

  • An electronic, photosensitive component used in certain types of barcode reading devices as a light-absorbing element in a linear or two-dimensional configuration.

  • Check Sum

  • Check Digit

  • Centre Pattern, Delineator Pattern

  • 1. An auxiliary character that divides the two halves of an EAN-13 or EAN-8 symbol.
    2. An auxiliary character that is used in certain barcode symbologies between two digits of an add-on symbol.

  • Codabar

  • A barcode displaying the ten digits and six special characters with four bars and three spaces. The code has four start/stop-characters. The symbology is also called the 2 of 7 Code or USS Codabar or USD-4 or Codabar Matrix or ABC-Codabar. It is a variant, able to make do with two different module widths.
    The first variant of the Codabar, also called Monarch Code or Standard-Codabar, is a Codabar with 18 different module widths and it is, therefore, virtually impossible to be printed on electronic data processing printing systems. This variant is hardly ever used nowadays.
    See chapter: "Codabar".

  • Code 128

  • The character set of the Code 128 comprises 128 characters, analogous to the ASCII character set. There are three different character sets (character set A or B or C) that can be utilized according to their intended use or application. Each character consists of nine modules, each with three bars and three spaces. The code is a multi-width code with up to four different module widths. The symbology is also called USD-6. Important special code specifications with the Code 128 as a basis are EAN 128 and UCC-128.
    See chapter: "Code 128".

  • Code 39

  • The character set of the Code 39 comprises 43 characters (10 digits, 26 upper-case letters, 7 special characters). Each character consists of nine elements, each of five bars and four spaces. The code is a two-width code. The symbology is also called Code Alpha 39 or 3 of 9 Code or Code 3 of 9 or USD-3. Important special code specifications with the Code 39 as a basis are the Code Danish PTT and French Postal.
    A variant of the Code 39, "Extended Code 39" or Code 39 Extended, enables the encoding of the complete ASCII character set. This is achieved by combining a special character with an alphabetic character (of 26 capital letters).
    See chapter: "Code 39".

  • Code 93

  • The character set of the Code 93 comprises, just like the Code 39, 43 characters (10 digits, 26 upper-case letters, 7 special characters). Each character consists of three bars and three spaces. The code is a multi-width code with up to four different module widths. The symbology is also called USD-7.
    A variant of the Code 93, "Extended Code 93" or Code 93 Extended enables the encoding of the complete ASCII character set. This is achieved by combining a control character with a letter (of 26 capital letters).
    See chapter: "Code 93".

  • Code Density

  • See "Information Density".

  • Codeart

  • See "Code Typ".

  • Code Type

  • See also "Symbology".

  • CPI (Characters per Inch)

  • Used for measuring the barcode density.