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: Microscan Train Gs1-Databar train_gs1-databar Training

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Introduction to RSS Symbology

Bar Codes 101

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Symbology History

•Introduced by the UCC

•AIM standard released in 1999

•The Reduced Space Symbology (RSS) family of symbols has been

developed for items too small to accommodate the traditional EAN.UCC

system linear bar code symbols.

•EAN.UCC RSS bar code symbols are exclusively reserved for encoding

identification numbers and data supplementary to the identification.

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Symbology Overview

•Omni-directional capability in some forms

•Multi-width bars and spaces

•Linear and stacked versions

•Most compact linear symbology

•Limited error correction available in Composite Component

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Symbology formats

The RSS family of bar code symbols has three different

members that can be used within the EAN.UCC system:

•RSS-14

•RSS Limited

•RSS Expanded

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Symbology family members

RSS 14

Encodes the full 14 digit EAN.UCC item identification in a

linear symbol. Read by suitably programmed point-of-sale

scanners.

Can be formatted 4 different ways.

RSS 14 (Standard)

RSS 14 Truncated: Reduced height to fit on small, narrow items

RSS 14 Stacked: Reduced length for short items with limited space

RSS 14 Omni directional: Designed to be read by retail omni-

directional scanners

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Symbology family members

RSS Limited

Encodes the full 14-digit EAN.UCC item identification with

indicator digits of zero or one in a linear symbol for use on

small items. Not designed for point-of-sale scanners.

Only one formatting option.

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Symbology family members

RSS Expanded

Encodes EAN.UCC item identification plus supplementary AI

element strings such as weight and “expiration date” in a linear

symbol. Read by suitably programmed point-of-sale scanners.

Two formatting options:

RSS Expanded StackedRSS Expanded®

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RSS-14 Stacked

Omnidirectional

Linear combinations of RSS Symbols

RSS Expanded

Stacked

RSS-14 Truncated

RSS Limited®

RSS Expanded®

RSS-14™

RSS-14 Stacked

RSS 14™ RSS Limited

RSS Expanded

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Composite component

RSS can encode additional information by linking in a

Composite Component, capable of containing up to 2,361 data

characters (depending on which symbology is selected.)

RSS-14 Limited

With PDF417 Composite Component

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Composite Component

Linear and 2D combinations of composite symbols

RSS-14 Truncated with

a 4-column CC-A

RSS-14 Limited with a

3-column CC-B

UCC/EAN-128 with a

5-column CC-C

EAN-13 with CC-A

EAN-8 with

CC-A

UPC-A with CC-B

UPC-E with

CC-A

UCC/EAN-128 with

CC-A

UCC/EAN-128 with

CC-C

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Advantages and disadvantages

RSS compared to linear bar codes

Advantages Disadvantages

ν Small, flexible size

ν Easy to print and read

ν Increased data

ν Uses common printing

methods

ν Customer number assigned

ν Increased data capacity

ν Can be read by some omni-

directional scanners

ν New symbology

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Advantages & disadvantages

RSS/Composite compared to 2D matrix codes

Advantages Disadvantages

ν

Flexible size

ν

Uses common printing

methods

ν

Customer number assigned

ν

Read by lasers in controlled

application

ν

Orientation requirements

ν

Limited direct marking

options

ν

Less compact

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More information

•If you have questions regarding this topic, send us an e-mail to

training@microscan.com

•If you would like further information about bar code

symbologies, we recommend you view Intro to Linear Bar

Codes and Intro to PDF417.