The product identity library
Look up a term, compare the standards, or follow a worked example. Each article links to its sources.
What is a Digital Product Passport?
A product passport connects identifiers, product data and access rights. Learn which information belongs in it, who maintains it and how EU product rules apply.
What is a DPP URL?
A printed URL must keep working as product information changes. Separate identity, the address, resolution and the information people receive.
What is GS1?
GS1 provides standards for identifying, capturing and sharing product information. See what a company prefix means and why it does not tell you where a product was made.
GTIN: one product identifier, several lengths
Work through a GTIN check-digit calculation and learn the difference between number formats, leading-zero padding and packaging-level identification.
UPC, UPC-A and UPC-E explained
UPC-A carries a GTIN-12; UPC-E uses defined zero-suppression rules. Follow a 12-digit example through GTIN normalisation and EPC prefix handling.
EAN-13 and EAN-8 explained
EAN-13 and EAN-8 carry different GTIN formats. Understand when numbers need normalising and why making a barcode image is different from encoding EPC.
What is an Electronic Product Code?
An EPC represents an identity; the RFID tag is its carrier. Inspect the fields in an SGTIN-96 example and distinguish EPC data from EPCIS event records.
SGTIN: from a product to an individual item
Encode GTIN 09521141890127 with serial 1001. Follow the field split, prefix confirmation and SGTIN-96 serial limits before using the encoder.
How GS1 Digital Link works
Read a GS1 Digital Link one path segment at a time: GTIN, lot and serial. Includes percent-encoding examples and the supported browser-tool subset.
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