test/schema.json

{
  "definitions": {},
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "http://example.com/root.json",
  "type": "object",
  "title": "The Root Schema",
  "required": [
    "local",
    "logger"
  ],
  "properties": {
    "local": {
      "$id": "#/properties/local",
      "type": "object",
      "title": "The Local Schema",
      "required": [
        "host"
      ],
      "properties": {
        "host": {
          "$id": "#/properties/local/properties/host",
          "type": "string",
          "title": "The Host Schema",
          "default": "",
          "pattern": "^(.*)$"
        }
      }
    },
    "logger": {
      "$id": "#/properties/logger",
      "type": "object",
      "title": "The Logger Schema",
      "required": [
        "level"
      ],
      "properties": {
        "level": {
          "$id": "#/properties/logger/properties/level",
          "type": "integer",
          "title": "The Level Schema",
          "default": 0
        }
      }
    }
  }
}