GS1 Digital Link: QR vs DataMatrix and what to encode

GS1 Digital Link is a practical approach to encode product identifiers into a web‑resolvable URL. It works well for Digital Product Passport implementations because it connects a scan (QR/DataMatrix) to a structured endpoint and a governed data model.

QR vs DataMatrix: when to choose which

• •QR: excellent consumer‑facing support and strong device compatibility.
• •DataMatrix (DMC): compact, industrial‑friendly, strong when code area is limited.

In both cases, the key is not the symbol, but what you encode and how you resolve it.

What to encode first

Start with an identifier you can guarantee. Many pilots begin with:

• •GTIN (product).
• •LOT (batch).
• •SERIAL (individual item, if applicable).

Why the endpoint matters

If the code points to a stable endpoint that can serve different views (public/service/recycler), you can evolve content without reprinting labels. This is where a good DPP architecture pays off.

Common pitfalls

• •Encoding temporary URLs that later change.
• •No clear ownership of data updates.
• •Printing codes without considering environmental durability.