{
  "$schema": "https://json-structure.org/meta/core/v0/#",
  "title": "HistoryEvent",
  "type": "object",
  "description": "Contains details about the events of an execution.",
  "fields": [
    {
      "name": "timestamp",
      "type": "string"
    },
    {
      "name": "type",
      "type": "string"
    },
    {
      "name": "id",
      "type": "string"
    },
    {
      "name": "previousEventId",
      "type": "string"
    },
    {
      "name": "activityFailedEventDetails",
      "type": "object",
      "description": "Contains details about an activity that failed during an execution."
    },
    {
      "name": "activityScheduleFailedEventDetails",
      "type": "string"
    },
    {
      "name": "activityScheduledEventDetails",
      "type": "object",
      "description": "Contains details about an activity scheduled during an execution."
    },
    {
      "name": "activityStartedEventDetails",
      "type": "object",
      "description": "Contains details about the start of an activity during an execution."
    },
    {
      "name": "activitySucceededEventDetails",
      "type": "object",
      "description": "Contains details about an activity that successfully terminated during an execution."
    },
    {
      "name": "activityTimedOutEventDetails",
      "type": "object",
      "description": "Contains details about an activity timeout that occurred during an execution."
    },
    {
      "name": "taskFailedEventDetails",
      "type": "string"
    },
    {
      "name": "taskScheduledEventDetails",
      "type": "string"
    },
    {
      "name": "taskStartFailedEventDetails",
      "type": "string"
    },
    {
      "name": "taskStartedEventDetails",
      "type": "string"
    },
    {
      "name": "taskSubmitFailedEventDetails",
      "type": "string"
    },
    {
      "name": "taskSubmittedEventDetails",
      "type": "string"
    },
    {
      "name": "taskSucceededEventDetails",
      "type": "string"
    },
    {
      "name": "taskTimedOutEventDetails",
      "type": "string"
    },
    {
      "name": "executionFailedEventDetails",
      "type": "object",
      "description": "Contains details about an execution failure event."
    },
    {
      "name": "executionStartedEventDetails",
      "type": "object",
      "description": "Contains details about the start of the execution."
    }
  ]
}