<https://www.stariongroup.eu/ensuring-quality-and-rigour-in-concurrent-design-9-how-to-manage-the-interfaces-between-subsystems/#article>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.stariongroup.eu/ensuring-quality-and-rigour-in-concurrent-design-9-how-to-manage-the-interfaces-between-subsystems/>