Seafood Module Transformation Event
Transformation events record existing input products being consumed to produce new output products. The seafood transformation event extends the core transformation event with seafood specific KDEs.
Event Profile
Seafood transformation events are identified by the following event characteristics.
type | TransformationEvent |
bizStep | commissioning |
disposition | active |
A seafood transformation event must have at least one output product with a
productClassification of seafood and processed.KDE Requirements
The following KDEs are required on the root of a seafood 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 |
| informationProvider | A URN formatted PGLN or GDST party identifier | urn:epc:sgln:08600031303.0.0, urn:gdst:example.org:party:example_prefix.0 |
| productOwner | A URN formatted PGLN or GDST party identifier | urn:epc:sgln:08600031303.0.0, urn:gdst:example.org:party:example_prefix.0 |
| readPoint | A readPoint object with an id property equal to a geo formatted coordinate pair |
geo:37.860236,-123.144697 |
Instance Lot Master Data (ILMD) Requirements
The following KDEs are required on the ilmd object on the transformation event.
| KDE | Description | Example Value |
|---|---|---|
| countryOfOrigin | ISO 2 or 3 letter country code for the nation where product underwent the last substantial transformation. **Note: Country of Origin/Product Origin labeling regulations are different for different nations. Please refer to applicable regulations in region of manufacture/sale to determine appropriate data. | USA |
Certificate Requirements
The following certificates are required on the certificationList on theilmd of a seafood transformation event.
| Certification | Certification Type |
|---|---|
| Chain of Custody | urn:gdst:certType:harvestCoC |
| Legal Authorization | urn:gdst:certType:urn:gdst:certType:processorLicense |
Certificates are required to have the following properties
| Certificate Property | Description | Example Value |
|---|---|---|
| certificationType | A URN formatted string defining the type of certificte | urn:gdst:certType:harvestCert |
| certificationAgency | The name of the certificate program owner | WHO |
| certificationStandard | The name of the standard associated with the certificate | WHO Human Decency Policy |
| certificationValue | An additional descriptor of the certificate if there are different quality values for the certificate | Quality class 4 |
| certificationIdentification | The ID of the certificate | 0987654321 |
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",
"readPoint": {
"id": "geo:37.7749,-122.4194"
},
"bizLocation": {
"id": "urn:gdst:example.org:location:loc:solution.processorplant"
},
"ilmd": {
"cbvmda:countryOfOrigin": "US",
"cbvmda:certificationList": {
"certification": [
{
"gdst:certificationType": "urn:gdst:certType:harvestCoC",
"certificationAgency": "CoC Agency",
"certificationStandard": "Generic Chain of Custody Standard",
"certificationValue": "abc123",
"certificationIdentification": "COC-0001"
},
{
"gdst:certificationType": "urn:gdst:certType:processorLicense",
"certificationAgency": "Processor Agency",
"certificationStandard": "Processor License Standard",
"certificationValue": "def456",
"certificationIdentification": "PROC-0002"
}
]
}
},
"gdst:productOwner": "urn:gdst:example.org:party:solution.processor",
"cbvmda:informationProvider": "urn:gdst:example.org:party:solution.processor"
}