Standardize default unit structure, each needs a suffix and a value:
Pixel
suffix: none
values: 0, 1, 2, 4, 8, 16, 32, 64, 128
View Height
suffixes: vh
values: 100
Percentages
suffix: p
values: 10, 20, 25, 30, 33, 40, 50, 60, 66, 70, 75, 80, 90, 100
Vertical Rhythm
suffix: cr
values: 1, 2, 3, 4
Character
suffix: ch
values: 25, 50, 75, 100