<https://www.thecorecollaborative.com/post/the-low-hanging-fruit-of-grading-reform-eliminating-the-zero>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.thecorecollaborative.com/post/the-low-hanging-fruit-of-grading-reform-eliminating-the-zero>