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.
KDE | Value |
type | TransformationEvent |
bizStep | commissioning |
disposition | active |
productClassification of seafood and processed.KDE Requirements
The following KDEs are required on the root of a seafood transformation event, in addition to the Core requirements.
| KDE | Description | Example Value |
|---|---|---|
| readPoint | A readPoint object with an id property equal to a geo formatted coordinate pair |
geo:37.860236,-123.144697 |
| productOwner | A URN formatted PGLN or GDST party identifier | urn:epc:id:sgln:08600031303.0.0, urn:gdst:example.org:party:example_prefix.0 |
| informationProvider | A URN formatted PGLN or GDST party identifier | urn:epc:id:sgln:08600031303.0.0, urn:gdst:example.org:party:example_prefix.0 |
| humanWelfarePolicy | Indicates whether a human welfare policy was in place during the event | internal policy, 3P audit, none |
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 |
countryOfOrigin is listed under the Wild-Capture and Aquaculture Transformation profiles in GDST 2.0. It is checked here because a land-based processing event resolves to this profile whatever its origin.Certificate Requirements
A seafood transformation event must carry at least one complete certificate in its certificationList. GDST 2.0 does not name certification types in its normative event profiles; the controlled list of supported values is maintained in the Certification Types article.
Certificates are required to have the following properties
| Certificate Property | Description | Example Value |
|---|---|---|
| certificationType | A URN formatted string defining the type of certificate | 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",
"gdst:humanWelfarePolicy": "3P audit",
"cbvmda:informationProvider": "urn:gdst:example.org:party:solution.processor"
}