Motorola Symbol MS4404 Integration Manual page 298

Glossary - 10 Symbol MS4404/MS4407 Integration Guide
Start/Stop Character. A pattern of bars and spaces that provides the scanner with start and stop reading instructions and
scanning direction. The start and stop characters are normally to the left and right margins of a horizontal code.
Substrate. A foundation material on which a substance or image is placed.
Symbol. A scannable unit that encodes data within the conventions of a certain symbology, usually including start/stop
characters, quiet zones, data characters and check characters.
Symbol Aspect Ratio. The ratio of symbol height to symbol width.
Symbol Density. The number of data characters per unit length; usually expressed as characters per inch (CPI).
Symbol Height. The distance between the outside edges of the quiet zones of the first row and the last row.
Symbol Length. Length of symbol measured from the beginning of the quiet zone (margin) adjacent to the start character
to the end of the quiet zone (margin) adjacent to a stop character.
Symbology. The structural rules and conventions for representing data within a particular bar code type (e.g. UPC/EAN,
Code 39, PDF417, etc.).
T
Tilt. Rotation of a bar code symbol on an axis perpendicular to the substrate.
Tolerance. Allowable deviation from the nominal bar or space width.
Two-dimensional symbology. A machine-readable symbol which must be examined both vertically and horizontally to
read the entire message.
A 2-dimensional (2-D) symbol may be one of two types of machine-readable symbols: a Matrix Symbol or a stacked
symbol. 2-D symbols differ from linear bar codes with the ability for high data content, small size, data efficiency and
error correction capability.
U
UCC. Uniform Code Council: the organization that administers the U.P.C and other retail standards.
UCC.EAN-128. Code 128 with a Function 1 character in the first position that is the symbology used with the UCC.EAN
format for a universal product number (UPN).
UPC. Universal Product Code. A relatively complex numeric symbology. Each character consists of two bars and two
spaces, each of which is any of four widths. The standard symbology for retail food packages in the United States.
V
Variable Length Code. A code with a number of encoded characters within a range, as opposed to a code with a fixed
number of encoded characters.