{
	"$schema": "http://json-schema.org/draft-04/schema#",
	"type": "object",
	"properties": {
		"type": {
			"type": "string",
			"readonly": true,
			"enum": ["shape", "attachment", "hole"]
		},
		"is_valid": {
			"type": "boolean",
			"readonly": true,
			"description": "For holes, if true the hole is valid"
		},
		"symmetry": {
			"type": "boolean",
			"default": false,
			"description": "For holes, if true then the holes will be duplicate for shape inner symmetry or full symmetry"
		},
		"symmetric_shape_id": {
			"type": "integer",
			"readonly": true,
			"description": "For holes, valid for inner symmtery shapes. if -1 there is no symmetric shape else it is a valid id"
		}
	}
}