John Alexis Guerra Gómez| ja.guerrag[at]uniandes.edu.co| @duto_guerra
http://johnguerra.co/lectures/visualAnalytics_24hours/03_Marks_and_channels/
Based onslides from Tamara Munzner
Encode most important attributes with highest ranked channels
[Automating the Design of Graphical Presentations of Relational Information. Mackinlay. ACM Trans. on Graphics (TOG) 5:2 (1986), 110–141]