extra.php

См. документацию.

<?php
 
 
namespace Bitrix\Catalog\RestView;
 
 
use Bitrix\Rest\Integration\View\Attributes;
use Bitrix\Rest\Integration\View\DataType;
use Bitrix\Rest\Integration\View\Base;
 
final class Extra extends Base
{
 
    public function getFields()
    {
        return [
            'ID'=>[
                'TYPE'=>DataType::TYPE_INT,
                'ATTRIBUTES'=>[
                    Attributes::READONLY
                ]
            ],
            'NAME'=>[
                'TYPE'=>DataType::TYPE_STRING,
                'ATTRIBUTES'=>[
                    Attributes::REQUIRED
                ]
            ],
            'PERCENTAGE'=>[
                'TYPE'=>DataType::TYPE_FLOAT,
                'ATTRIBUTES'=>[
                    Attributes::REQUIRED
                ]
            ]
        ];
    }
}