<https://dev.to/tschallacka/how-to-save-a-magento-2-product-attribute-programmatically-10po>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://dev.to/tschallacka/how-to-save-a-magento-2-product-attribute-programmatically-10po>