The DPP must be connected through a data carrier to a persistent unique product identifier. The data carrier must be physically present on the product, packaging, or accompanying documentation as specified by the delegated act, and the data must be open-standard, interoperable, machine-readable where appropriate, structured, searchable, and transferable without vendor lock-in.
ESPR does not hard-code QR or NFC as the universal answer in the main regulation. The product delegated act specifies the data carrier and layout. QR codes are a common candidate for electronic access, while NFC or RFID may be relevant where the selected standard and product rule allow them; the governance control is that identifiers, data carriers, access rights, update rights, back-up copies, security, privacy, and service-provider arrangements remain traceable and documented.