{
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "definitions": {
        "envelope": {
            "additionalProperties": false,
            "description": "A versioned envelope.",
            "properties": {
                "data": {
                    "description": "The payload."
                },
                "schema_id": {
                    "description": "The value of the '$id' property of the schema that constraints this JSON document.",
                    "minLength": 1,
                    "type": "string"
                }
            },
            "required": [
                "data",
                "schema_id"
            ],
            "type": "object"
        }
    },
    "id": "https://fuchsia.dev/schema/common-00000000.json"
}