Framework

Data Variables
1D, 2D, 3D, 4D, 5D, ..., ND

Geometric Primitives/ Marks
point, line, area, surface, volume

Perceptual Channels/ Retinal Properties
size, brightness, color, texture, orientation, shape,...
parameters control appearance of marks
channels of information flowing from retina to brain

Data Types
nominal, ordered, quantitative

[Mackinlay/Card; Bertin; Wilkinson; Stolte et al]

12