<https://www.elitemcommerce.com/blog/2019/05/03/how-to-buy-a-custom-software-product/#primaryimage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.elitemcommerce.com/blog/2019/05/03/how-to-buy-a-custom-software-product/>