<?php

return [
	'potentialAction' => [
		'type' => 'array|@Thing',
		'item_type' => '@Thing',
	],
	'url' => 'url',
	'usageInfo' => 'url',
	'inLanguage' => 'string|array',
	'assesses' => 'string|array',
	'learningResourceType' => 'string',
];
