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The Number of Element Widths is either two (wide and
narrow) or multiple. Multiple element width symbology
is usually the higher density continuous type.
The symbology Length can be fixed or variable.
Density describes the amount of data that can be encoded
in a given unit of length.
A symbology is said to be Self Checking if a single
printing defect will not cause a character to be transposed
into another character in the same symbology.
A Start Code is a particular pattern of lines and spaces
indicating the beginning of the bar code symbol. A Stop
Code indicates the end of the symbol. The start and stop
codes are sometimes also used to indicate the scanning
direction. In the most common symbology, Code 39, the
start and stop codes are asterisks.
The Check Character is used by the scanner to validate
that the correct data has been decoded. It is placed in a
predetermined position and its value is based on a
mathematical relationship of the other characters in the
symbol. A Check Digit is a check character that can
assume only numeric values.
A Bi-directional symbology can be successfully scanned
in either direction. Almost all symbologies in use today
are bi-directional.
Card Software Symbologies
The symbologies listed below can be printed with the Card
Software.
Card Software User Manual
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