10.2. Character Class Spacing: the text-spacing property

no-compress
Justification must not compress text-spacing. (If this value is not specified, the justification process may reduce autospacing except when the spacing is at the start or end of the line.)

Suppressing compression is an odd man out here, since it has to do with justification. I see justification as something that is applied to the text after the text-space adjustments have been applied (or not). Seems like it would be more intuitive to make no-compress an optional value for text-justify, rather than one for text-space.