Products.
A product instance is a GTIN plus a serial; a product class is a GTIN. EPCIS 2.0 carries the first in the epcList and the second in the quantityList. The gateway validates the shape and normalises the Digital Link before it hashes the event.
epcListquantityList
Build state, 29 July 2026. The capture gateway is written and passing its conformance tests; nothing is hosted yet. See What for the dimension, and What ships today for the dated ledger.