User's Manual

Chapter 6 — Bar Code Symbologies

CK60 Series Handheld Computer User’s Manual 121

mainly a numeric symbology (0-9) with six extra characters available for

assigning any symbol or letter desired.

Plessey codes employ a variety of check characters and a polynomial–based

Cyclic Redundancy Check (CRC). For start and stop characters, Plessey

employs a 1101 and previously used a 0101.

This symbology is very limited about what information can be encoded. It

is not considered for new applications.

QR Code (Quick Response Code)

QR Code is a 2D matrix symbology containing dark and light square data

modules. It has position detection patterns on three of its four corners and

features direct encodation of the Japanese Kana-Kanji character set. A 2D

imaging device such as a CCD camera is necessary to scan the symbology.

QR Code is designed with selectable levels of error correction. It supports

industry standard escape sequences to define international code pages and

special encodation schemes. QR Code is used for small item marking appli-

cations using a wide variety of printing and marking technologies. This

document includes descriptions of the character encodation, symbol struc-

ture, reference decode algorithm, and symbol quality measurements for QR

Code.

RSS (Reduced Space Symbology)

The EAN.UCC RSS family has three linear symbologies to use with the

EAN.UCC system. Usage is restricted and subject to compliance with the

EAN International/UCC rules and registration procedures.

RSS 14

RSS 14 encodes the full 14-digit EAN.UCC item identification in a linear

symbol scanned omnidirectionally by suitably programmed POS scanners.

RSS Expanded

RSS Expanded encodes EAN.UCC item identification plus supplementary

AI element strings such as weight and “best before” date in a linear symbol

that can be scanned omnidirectionally by programmed POS scanners.

RSS Limited

RSS Limited encodes a 14-digit EAN.UCC item identification with Indi-

cator digits of zero or one in a linear symbol for use on small items that is

not scanned at the POS.