{
  "type": "object",
  "name": "Schema1",
  "properties": {
    "type": {
      "type": "string"
    },
    "items": {
      "type": "object",
      "properties": {
        "$ref": {
          "type": "string"
        }
      },
      "required": [
        "$ref"
      ]
    }
  },
  "required": [
    "type",
    "items"
  ],
  "$schema": "https://json-structure.org/draft/2020-12/schema"
}