<https://www.adweko.com/project/part-3-assigning-a-calculation-view-to-a-model-in-sac/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.adweko.com/project/part-3-assigning-a-calculation-view-to-a-model-in-sac/>