Two-dimensional (2D) barcodes look like squares or rectangles that contain many small, individual dots.
A single 2D barcode can hold a significant amount of information and may remain legible even when printed at a small size or etched onto a product. 2D barcodes are used in a wide range of industries, from manufacturing and warehousing to logistics and healthcare.
GS1 DataMatrix

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Symbol ID: ]d2
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Capacity: 3116 Numeric capacity, 2335 Alphanumeric capacity
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Omnidirectional
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Supports all keys
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Supports attributes
GS1 QR Code

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Symbol ID: ]Q3
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Capacity: 7089 Numeric capacity 4296 Alphanumeric capacity
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Omnidirectional
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Supports all keys
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Supports attributes
Standards
You will find relevant application standards and guidelines listed below:
All sectors
GS1 Human Readable Interpretation (HRI) Guideline
RFID Barcode Interoperability Guideline
Apparel
GS1 Symbol placement examples for clothing and fashion accessories
Healthcare
Use of GS1 2D/Matrix Data Carriers in Healthcare