Skip to main content

EPCIS event types

EPCIS 2.0 defines five event categories. Stockaj uses all of them.

ObjectEvent​

The most common — a single action on one or more instances.

{
  "type": "ObjectEvent",
  "eventTime": "2026-04-27T19:30:00.000Z",
  "eventTimeZoneOffset": "+02:00",
  "epcList": ["urn:epc:id:sgtin:9506000.134352.ABC123"],
  "action": "OBSERVE",
  "bizStep": "urn:epcglobal:cbv:bizstep:shipping",
  "disposition": "urn:epcglobal:cbv:disp:in_transit",
  "readPoint":   { "id": "urn:epc:id:sgln:9506000.00001.0" },
  "bizLocation": { "id": "urn:epc:id:sgln:9506000.00002.0" },
  "bizTransactionList": [
    { "type": "urn:epcglobal:cbv:btt:po", "bizTransaction": "urn:stockaj:transaction:rental:42" }
  ]
}

AggregationEvent​

Children loaded into / unloaded from a parent (SSCC pallet, returnable container).

{
  "type": "AggregationEvent",
  "action": "ADD",
  "parentID": "urn:epc:id:sscc:9506000.000134352",
  "childEPCs": [
    "urn:epc:id:sgtin:9506000.134352.ABC123",
    "urn:epc:id:sgtin:9506000.134352.ABC124"
  ],
  "bizStep": "urn:epcglobal:cbv:bizstep:packing"
}

TransactionEvent​

Binds instances to a business document (rental, PO, sale).

TransformationEvent​

Inputs consumed → outputs produced. Used when assembling a kit.

{
  "type": "TransformationEvent",
  "inputEPCList": [
    "urn:epc:id:sgtin:9506000.111111.A",
    "urn:epc:id:sgtin:9506000.222222.B"
  ],
  "outputEPCList": [
    "urn:epc:id:sgtin:9506000.999999.KIT-1"
  ],
  "bizStep": "urn:epcglobal:cbv:bizstep:assembling"
}

AssociationEvent (EPCIS 2.0)​

Used to bind a sensor (e.g. cold-chain logger) to an instance. ASSOCIATION ADD on bind, ASSOCIATION DELETE on unbind.

Action values​

  • ADD — instance enters scope.
  • OBSERVE — instance state changed but identity persists.
  • DELETE — instance leaves scope (destroyed, lost).