{
	"title": "Layer stack",
	"required": [
		"layers"
	],
	"additionalProperties": false,
	"properties": {
		"layers": {
			"type": "array",
			"minItems": 2,
			"items": {
				"anyOf": [
					{
						"type": "string"
					},
					{
						"type": "object",
						"required": [
							"label"
						],
						"additionalProperties": false,
						"properties": {
							"id": {
								"type": "string"
							},
							"label": {
								"type": "string",
								"maxLength": 40
							},
							"sub": {
								"type": "string",
								"maxLength": 56
							},
							"focal": {
								"type": "boolean"
							},
							"kind": {
								"type": "string"
							},
							"items": {
								"type": "array",
								"maxItems": 6,
								"items": {
									"type": "string",
									"maxLength": 24
								}
							}
						}
					}
				]
			}
		}
	}
}