Dapr CloudEvent

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://github.com/api-evangelist/dapr/blob/main/json-schema/cloud-event.json",
  "title": "Dapr CloudEvent",
  "description": "A CloudEvents 1.0 specification envelope used by Dapr for pub/sub messaging. All published events are wrapped in this format unless raw payload mode is enabled.",
  "type": "object",
  "required": [
    "specversion",
    "type",
    "source",
    "id"
  ],
  "properties": {
    "specversion": {
      "type": "string",
      "description": "The version of the CloudEvents specification.",
      "enum": [
        "1.0"
      ]
    },
    "type": {
      "type": "string",
      "description": "The type of the event."
    },
    "source": {
      "type": "string",
      "description": "The source of the event, typically the app ID of the publisher."
    },
    "id": {
      "type": "string",
      "description": "Unique identifier for the event."
    },
    "subject": {
      "type": "string",
      "description": "The subject of the event in context of the event producer."
    },
    "time": {
      "type": "string",
      "format": "date-time",
      "description": "Timestamp of when the event occurred (RFC 3339)."
    },
    "datacontenttype": {
      "type": "string",
      "description": "Content type of the data attribute (e.g., application/json)."
    },
    "data": {
      "description": "The event payload data."
    },
    "topic": {
      "type": "string",
      "description": "The topic the event was published to (Dapr extension)."
    },
    "pubsubname": {
      "type": "string",
      "description": "The name of the pub/sub component (Dapr extension)."
    },
    "traceid": {
      "type": "string",
      "description": "The distributed tracing identifier (Dapr extension)."
    },
    "traceparent": {
      "type": "string",
      "description": "The W3C trace context traceparent header value (Dapr extension)."
    },
    "tracestate": {
      "type": "string",
      "description": "The W3C trace context tracestate header value (Dapr extension)."
    }
  }
}