<https://dabrianmarketing.com/blog/ecommerce-retail-marketing/mobile-design-tips-for-ecommerce/#schema-nav-element-12344>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://dabrianmarketing.com/blog/ecommerce-retail-marketing/mobile-design-tips-for-ecommerce/>