Since Magento 2 is pretty close to release we can review how the adding of custom attribute process has been changed. Today we will make Magento 2 extension which adds customer attribute into customer edit page at admin.
To start with it we will have to have Magento 2 installed with Demo data. You can find Magento 2 Installation Guide at Magento 2 Developer Documentation.
Magento as rich eCommerce platform has ability to add reviews for products. At some point if customers have questions about products it becomes indeed to have some automatic tool where customer can add question about product then get answer. Also this information helps other customers to get more information about product. The extension Questions and Answers helps to solve this issue in Magento.