<https://elmaestrogeek.com/apple-permitira-a-los-usuarios-de-la-app-store-regalar-compras-in-app/#organization>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://elmaestrogeek.com/apple-permitira-a-los-usuarios-de-la-app-store-regalar-compras-in-app/>