Interleaved 2 Of 5 (I 2 Of 5); Matrix 2 Of 5; Maxicode; Micro Pdf417 - Intermec CK60 User Manual

Interleaved 2 of 5 (I 2 of 5)

Matrix 2 of 5

MaxiCode

Micro PDF417

CK60 Series Handheld Computer User's Manual
I 2 of 5 (Interleaved 2 of 5 Code) is an all-numeric symbology, widely used
for warehouse and heavy industrial applications. Its use has been particu-
larly prevalent in the automobile industry. The I 2 of 5 symbology can be
placed on smaller labels than what the standard UPC symbology requires.
I 2 of 5 also provides a little more flexibility on the type of material it can
print on. Interleaved 2 of 5 Code has its name because of the way the bar
code is configured.
I 2 of 5 bars and spaces both carry information. The bars represent the odd
number position digits, while spaces represent the even number position
digits. The two characters are interleaved as one. Messages encoded with
this symbology have to use an even number of characters since two numeric
characters always get interleaved together.
Matrix 2 of 5 is a derivative of Code 11 and is a linear bar code limited to
ten digits and a start/stop character. Discrete but not self-checking. Matrix
2 of 5 is used with a single Modulo 10 check digit. Compared with Code
11 (using two check digits) and the other industrial symbologies, Matrix 2
of 5 is somewhat more subject to substitution errors and offers no particular
advantage.
MaxiCode is a fixed-size code which holds up to 93 data characters. The
symbol is composed of a central bulls-eye locator and offset rows of hexago-
nal elements; the overall dimensions of the symbol are approximately 1.11
x 1.054 inches. Each element measures 0.035 x 0.041 inches.
Created by United Parcel Service, the MaxiCode symbol is for quick auto-
mated scanning of packages on high-speed conveyor lines (special cameras
can read a MaxiCode on a carton travelling at up to 500 feet per minute).
Micro PDF417 is derived from PDF417. The code has a limited set of
symbol sizes and a fixed level of error correction for each symbol size. Mod-
ule dimensions are user-specified so that the symbol may be printed with a
variety of printers. The symbology allows up to 150 bytes, 250 alphanu-
meric characters, or 366 numeric digits to be stored. This is done by speci-
fying one of three compaction modes: data, text or numeric. Text
Compaction mode permits all printable ASCII characters to be encoded
(values 32 to 126 inclusive) as well as selected control characters. Byte
Compaction mode permits all 256 possible 8-bit byte values to encode.
This includes all ASCII characters value 0 to 127 inclusive and provides for
Chapter 6 — Bar Code Symbologies
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