content: {
    "$defs": {
      "Message": {
        "description": "Message represents a simple message object with a title and some content meant.",
        "examples": [
          {
            "content": "This is an example message.",
            "title": "Example Title"
          }
        ],
        "properties": {
          "content": {
            "description": "Details of what exactly this message wants to communicate.",
            "title": "Content",
            "type": "string"
          },
          "meta": {
            "$ref": "https://gobl.org/draft-0/cbc/meta",
            "description": "Any additional semi-structured data that might be useful.",
            "title": "Meta Data"
          },
          "title": {
            "description": "Summary of the message content",
            "title": "Title",
            "type": "string"
          },
          "uuid": {
            "description": "Universally Unique Identifier.",
            "format": "uuid",
            "title": "UUID",
            "type": "string"
          }
        },
        "required": [
          "content"
        ],
        "type": "object"
      }
    },
    "$id": "https://gobl.org/draft-0/note/message",
    "$ref": "#/$defs/Message",
    "$schema": "https://json-schema.org/draft/2020-12/schema"
  }