Feature Types and Scales

Scale Type	Description	Feature Type	Further classification	Example
Nominal	no meaningful order	qualitative	discrete	gender; eye colour
Ordinal	Expressions can be ordered, but distances cannot be interpreted	qualitative + low quantitatve aspects	disctrete	always > frequently > occasionally > never
Cardinal	Expressions are numbers whose distances can be interpreted meaningfully	quantitative	discrete/continous	height; duration