UserField::getScheme

static function getScheme($entityId = 0, $userId = 0, $languageId = LANGUAGE_ID)
{
	$userId = intval($userId);
	if(!$userId)
	{
		$userId = User::getId();
	}

	$ufs = static::getUserFields($entityId, $userId, $languageId);

	// restore system fields for this entity
	if(User::isSuper($userId)) // only admin is allowed to create user fields
	{
		$reFetch = false;
		$scheme = static::getSysScheme();
		foreach($scheme as $field)
		{
			if(!array_key_exists($field['FIELD_NAME'], $ufs))
			{
				if(static::add(array_merge(array('ENTITY_ID' => static::getEntityCode()), $field)))
				{
					$reFetch = true;
				}
			}
		}

		if($reFetch)
		{
			$ufs = static::getUserFields($entityId, $userId, $languageId);
		}
	}

	/*
	// todo: restricted completely or restricted by the current project plan? you must now both ways!
	// determine what we can do here
	$canSortAndFilter = UtilUserFieldRestriction::canManage(static::getEntityCode());

	foreach($ufs as $code => $desc)
	{
		$ufs[$code]['TASKS_RESTRICTION'] = array(
			'SORT' => $canSortAndFilter,     // whether we can sort by this field or not
			'FILTER' => $canSortAndFilter,   // whether we can filter by this field or not
		);
	}
	*/

	return $ufs;
}