{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://raw.githubusercontent.com/api-evangelist/rfid/main/json-schema/rfid-epc-event-schema.json",
  "title": "RFID EPC EPCIS Event",
  "description": "An EPCIS 2.0 event capturing the state or movement of RFID-tagged objects in a supply chain",
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "enum": [
        "ObjectEvent",
        "AggregationEvent",
        "TransactionEvent",
        "TransformationEvent",
        "AssociationEvent"
      ],
      "description": "EPCIS event type"
    },
    "eventTime": {
      "type": "string",
      "format": "date-time",
      "description": "ISO 8601 timestamp when the event occurred"
    },
    "eventTimeZoneOffset": {
      "type": "string",
      "pattern": "^[+-]\\d{2}:\\d{2}$",
      "description": "Time zone offset of the event (e.g., +00:00)"
    },
    "epcList": {
      "type": "array",
      "items": {
        "type": "string",
        "description": "Electronic Product Code in URN format (e.g., urn:epc:id:sgtin:0614141.107346.2017)"
      },
      "description": "List of EPCs involved in the event"
    },
    "action": {
      "type": "string",
      "enum": ["ADD", "OBSERVE", "DELETE"],
      "description": "The action taken on the EPCs at this event"
    },
    "bizStep": {
      "type": "string",
      "description": "Business step URI indicating the business process step (CBV vocabulary)",
      "examples": [
        "urn:epcglobal:cbv:bizstep:shipping",
        "urn:epcglobal:cbv:bizstep:receiving",
        "urn:epcglobal:cbv:bizstep:stocking",
        "urn:epcglobal:cbv:bizstep:pos"
      ]
    },
    "disposition": {
      "type": "string",
      "description": "Disposition URI indicating the status of the objects (CBV vocabulary)",
      "examples": [
        "urn:epcglobal:cbv:disp:in_transit",
        "urn:epcglobal:cbv:disp:in_progress",
        "urn:epcglobal:cbv:disp:sellable_accessible"
      ]
    },
    "readPoint": {
      "type": "object",
      "properties": {
        "id": {
          "type": "string",
          "description": "URI identifying the specific physical read point"
        }
      },
      "required": ["id"]
    },
    "bizLocation": {
      "type": "object",
      "properties": {
        "id": {
          "type": "string",
          "description": "URI identifying the business location (GLN or custom URI)"
        }
      },
      "required": ["id"]
    },
    "bizTransactionList": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "type": { "type": "string" },
          "bizTransaction": { "type": "string" }
        }
      }
    },
    "sensorElementList": {
      "type": "array",
      "items": {
        "type": "object",
        "description": "Sensor data (temperature, humidity, etc.) associated with the event"
      }
    }
  },
  "required": ["type", "eventTime", "action"]
}