UML training


 * https://courses.edx.org/courses/course-v1:KULeuvenX+UMLx+1T2020/courseware/916c9c735a284801ba31a58d50b259a1/00435fb07efa446dbb1057ea036b1c28
 * In this course we'll focus on UML Class diagrams and their use for conceptual data modelling.
 * Basic concepts: classes, associations