Core Module Transformation Event
Transformation events record existing input products being consumed to produce new output products. These events represent any process that changes a product's physical form, composition, or packaging in a way that affects its traceability.
Event Profile
Transformation events are identified by the following event characteristics.
KDE | Value |
type | Transformation Event |
disposition | active |
bizStep | commissioning |
KDE Requirements
The following KDEs are required on the root of a transformation event.
| KDE | Description | Example Value |
|---|---|---|
| eventID | A URN formatted universally unique ID (UUID) | urn:uuid:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx |
| eventTime | A string value formatted as an ISO datetime | 2026-01-01T00:00:00.000Z |
| eventTimeZoneOffset | The time zone offset in effect at the time and place the event occurred, expressed as an offset from UTC. The purpose of eventTimeZoneOffset is to provide additional business context about the event, namely to identify what time zone offset was in effect at the time and place the event was captured. | "+00:00" |
| disposition | The disposition field of an event specifies the business condition of the event's objects, subsequent to the event. The disposition is assumed to hold true until another event indicates a change of disposition. A full list of disposition values and their definitions is available in the EPCIS Core Business Vocabulary | active |
| bizLocation | A URN formatted GLN or GDST location identifier validated as a GLN with related master data | urn:epc:id:gln:1234567890123, urn:gdst:example.org:location:loc:examplePrefix.0 |
Full JSON Example
{
"@context": [
"https://ref.gs1.org/standards/epcis/epcis-context.jsonld",
{
"gdst": "https://traceability-dialogue.org/epcis"
}
],
"type": "TransformationEvent",
"eventTime": "2026-04-19T22:08:41.6112327+00:00",
"eventTimeZoneOffset": "+00:00",
"eventID": "urn:uuid:b4e07e3a-54cb-47e0-b8f4-6a63d5fc99ee",
"inputQuantityList": [
{
"epcClass": "urn:gdst:example.org:product:lot:class:solution.wildfish.lot2",
"quantity": 9876,"uom": "KGM"
},
{
"epcClass": "urn:gdst:example.org:product:lot:class:solution.farmedfish.lot1",
"quantity": 6000,"uom": "KGM"
}
],
"outputQuantityList": [
{
"epcClass": "urn:gdst:example.org:product:lot:class:solution.processedfish.final1",
"quantity": 15876,
"uom": "KGM"
}
],
"bizStep": "commissioning",
"disposition": "active",
"bizLocation": {
"id": "urn:gdst:example.org:location:loc:solution.processorplant"
}
}