venv/lib/python3.12/site-packages/jupyter_events/schemas/event-metaschema.yml

$schema: http://json-schema.org/draft-07/schema
$id: http://event.jupyter.org/event-metaschema
version: 1
title: Event Metaschema
description: |
  A meta schema for validating that all registered Jupyter Event
  schemas are appropriately defined.
type: object
properties:
  version:
    type: integer
  title:
    type: string
  description:
    type: string
  properties:
    type: object
    additionalProperties:
      $ref: http://event.jupyter.org/property-metaschema
    propertyNames:
      pattern: ^(?!__.*)
patternProperties:
  "\\$id":
    type: string
    format: uri

required:
  - $id
  - version
  - properties