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Payload data

IBM Food Trust™ provides the payload data upload method to extend support beyond the standard GS-1 data types. Use a payload to attach user-defined data (such as attributes) to events, items (product lots, serial shipping containers, pallets) or locations.

Payload types

Payloads must specify the type of contained data, using the <payloadTypeURI> tag. IBM Food Trust defines the following payload types:

  • Key-value pairs
  • Sensor data
  • Strings

The examples below show the <payloadTypeURI> value that must be used for each of these payload types.

Attachment points

A submitted payload should attach to an item (Product ID), an EPC, location (Facility ID) or event (EPCIS event ID). Include one of the following data points in your payload:

  1. Product identifier - Product identifier using the productList element in the payload XML.
  2. Electronic Product Code (EPC) - An EPC-SSCC, FTLPN, SGTIN, SFTPI, LGTIN, or LFTPI using the epcList element in the payload XML.
  3. Location Identifier - Supply chain Location (Facility ID) using the locationList element in the payload XML.
  4. EPCIS Event ID - For a Commission, Decommission, Aggregation, Disaggregation, Transformation or Observation event using the eventIDList element in the payload XML.

Note: The content type examples below attach to an EPC: urn:ibm:ift:product:serial:obj:1234567890123.LiveCow.lc11

Usage notes

Consider the following usage notes when uploading payload data:

  1. The only payload data visible in the IBM Food Trust UI are key-value pairs that are attached to a supported Product ID or Facility ID—which are GS1 formats for SSCC, GTIN, SGTIN, LGTIN, GLN, and EPC-SGLN and their IBM Food Trust equivalents only.
  2. To change the name of the payload in the IBM Food Trust UI, upload a key-value pair with Title as the key and the new name as the value.
  3. Payload messages cannot exceed 32 KB.

Submit payload data

Submit your payload using the IBM Food Trust Connector API assets endpoint. Simply paste your payload XML into the asset Parameter Value field and click the Try it out! button.

The following examples describe the XML for each payload type:

Key-value pairs

Use the key-value pair payload data type to upload any set of variable-value combinations.

Key-value pairs payload data must be specified using the following format:

<payloadTypeURI>urn:ibm:ift:payload:type:json:triple</payloadTypeURI>

The following code shows a sample payload specifying key-value pairs payload data:

<ift:payload xmlns:ift="urn:ibm:ift:xsd:1">
  <payloadMessage>
    <payloadID>41b14d7a-5b04-11e9-bdaa-6c4008984c16</payloadID>
    <payloadTime>2019-03-01T08:00:00Z</payloadTime>
    <payloadContentType>application/json</payloadContentType>
    <payloadTypeURI>urn:ibm:ift:payload:type:json:triple</payloadTypeURI>
    <epcList>
      <epc>urn:ibm:ift:product:serial:obj:1234567890123.LiveCow.lc11</epc>
    </epcList>
    <payload>[{key":"title", "value":"My test payload","type":"string"}, {"key": "Lot Number", "value": "LiveCow.lc11", "type": "string"}, {"key": "Lairage Intake Date", "value": "2019-03-01 08:00:00", "type": "string"}, {"key": "Herd Number", "value": "Herd-lc11", "type": "string"}, {"key": "Site Code", "value": "Site0001", "type": "string"}, {"key": "Eartag", "value": "Ear-lc11", "type": "string"}]</payload>
  </payloadMessage>
</ift:payload>

Sensor data

Use the sensor payload data type to upload temperature data collected by sensor devices - either ambient (location temperature) or probe (product temperature).

The sensor payload data type must be specified using the following format:

<payloadTypeURI>urn:ibm:ift:payload:type:json:sensor:v2</payloadTypeURI>

The following code shows a sample ambient temperature (in Fahrenheit) sensor data payload for the specified location:

<ns0:payload xmlns:ns0="urn:ibm:ift:xsd:1">
  <payloadMessage>
    <payloadID>urn:uuid:00000000-0000-0000-0000-00003b9acc47</payloadID>
    <payloadTime>2020-01-15T00:00:00Z</payloadTime>
    <payloadContentType>application/json</payloadContentType>
    <payloadTypeURI>urn:ibm:ift:payload:type:sensor:v2</payloadTypeURI>
    <locationList>
      <location>urn:ibm:ift:location:extension:loc:0070217.5043.0</location>
    </locationList>
    <payload>
      {"payload": {"readings": [{"value": 48.97403963890513, "time": "2020-01-14T00:00:00Z"},
      {"value": 49.38640811696154, "time": "2020-01-14T00:15:00Z"},
      {"value": 49.482325803716854, "time": "2020-01-14T00:30:00Z"},
      {"value": 49.7178481505353, "time": "2020-01-14T00:45:00Z"},
      {"value": 55.114865776213215, "time": "2020-01-14T03:15:00Z"},  
      {"value": 93.69268608689146, "time": "2020-01-14T23:30:00Z"},
      {"value": 94.4938525640488, "time": "2020-01-14T23:45:00Z"}],
      "device_id": "S00001", "type": "gs1:Temperature", "uom": "FAH",
      "reading_type": "urn:ibm:ift:sensor:readingtype:ambient"}}
</payload>
  </payloadMessage>
</ns0:payload>

The following code shows a sample probe temperature (in Fahrenheit) sensor data payload for the specified product instance (EPC) and sublocation:

<?xml version="1.0" encoding="UTF-8"?>
<ift:payload xmlns:ift="urn:ibm:ift:xsd:1">
  <payloadMessage>
    <payloadID>string</payloadID>
    <payloadTime>2018-09-28T21:49:45Z</payloadTime>
    <payloadContentType>application/json</payloadContentType>
    <payloadTypeURI>urn:ibm:ift:payload:type:sensor:v2</payloadTypeURI>
    <eventIDList/>
    <epcList>
      <epc>urn:ibm:ift:product:serial:obj:0614141000000.107346.2016</epc>
    </epcList>
    <locationList>
      <location>urn:ibm:ift:location:extension:loc:1234567890123.store-123.toy-department</location>
    </locationList>
    <payload>
      {
        "payload": {
          "reading_type": "urn:ibm:ift:sensor:readingtype:probe",
          "device_id": "S00001",
          "uom": "FAH",
          "type": "gs1:Temperature",
          "readings": [
            {
              "time": "2018-09-12T01:00:00.000Z",
              "value": 45
            },
            {
              "time": "2018-09-12T01:05:00.000Z",
              "value": 40
            }
          ]
        }
      }
    </payload>
  </payloadMessage>
</ift:payload>

Strings

Use the string payload data type to upload any string. The string payload data type must be specified using the following format:

<payloadTypeURI>string</payloadTypeURI>

<ift:payload xmlns:ift="urn:ibm:ift:xsd:1"> <payloadMessage> <payloadID>41b14d7a-5b04-11e9-bdaa-6c4008984c16</payloadID> <payloadTime>2019-03-01T08:00:00Z</payloadTime> <payloadContentType>application/json</payloadContentType> <payloadTypeURI>string</payloadTypeURI> <epcList> <epc>urn:ibm:ift:product:serial:obj:1234567890123.LiveCow.lc11</epc> </epcList> <payload> Any customized string up to the 32 KB length limit. </payload> </payloadMessage> </ift:payload>