ciLow property
CILow and CIHigh are the 95% Wilson interval on Measured, in percent. They are what makes the score comparable: at n=198 a 98% carries roughly ±2 points, so most differences at the top of a board are not distinguishable and a bare number implies a precision it does not have. Absent when there is no measurement.
Please note: This property should have been non-nullable! Since the specification file does not include a default value (using the "default:" property), however, the generated source code must fall back to having a nullable type. Consider adding a "default:" property in the specification file to hide this note.
Implementation
num? ciLow;