dokytree/samples/it_v1/schemas_builder/parts/todo.json

{
	"$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {
		"todo": {
			"type": "array",
			"items": {
				"type": "object",
				"properties": {
					"msg": {
						"anyOf": [
							{"type": "string"},
							{"enum": [
								"''"
							]}
						]
					},
					"priority": { "type": "integer" },
					"duration": {
						 "anyOf": [
							{"type": "integer"},
							{"type": "string"},
							{"enum": [
								"''"
							]}
						]
					}
				}
			}
		}
	}
}