{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://api-evangelist.com/schemas/apache-event-mesh/cloudevent.json",
  "title": "CloudEvents v1.0",
  "description": "Schema for a CloudEvents v1.0 specification compliant event as used by Apache EventMesh.",
  "type": "object",
  "required": ["specversion", "id", "source", "type"],
  "properties": {
    "specversion": {
      "type": "string",
      "const": "1.0",
      "description": "The version of the CloudEvents specification"
    },
    "id": {
      "type": "string",
      "description": "Identifies the event. Must be unique within the scope of the source."
    },
    "source": {
      "type": "string",
      "format": "uri-reference",
      "description": "Identifies the context in which an event happened"
    },
    "type": {
      "type": "string",
      "description": "Describes the type of event related to the originating occurrence"
    },
    "datacontenttype": {
      "type": "string",
      "description": "Content type of the data value (e.g., application/json)"
    },
    "dataschema": {
      "type": "string",
      "format": "uri",
      "description": "Identifies the schema that data adheres to"
    },
    "subject": {
      "type": "string",
      "description": "Describes the subject of the event in the context of the event producer"
    },
    "time": {
      "type": "string",
      "format": "date-time",
      "description": "Timestamp of when the occurrence happened"
    },
    "data": {
      "description": "The event payload"
    },
    "data_base64": {
      "type": "string",
      "contentEncoding": "base64",
      "description": "Base64-encoded event payload"
    }
  }
}