exclusiveMaximum property
The value of "exclusiveMaximum" MUST be a boolean, representing whether the limit in "maximum" is exclusive or not.
An undefined value is the same as false.
If "exclusiveMaximum" is true, then a numeric instance SHOULD NOT be equal to the value specified in "maximum". If "exclusiveMaximum" is false (or not specified), then a numeric instance MAY be equal to the value of "maximum".
Implementation
bool? exclusiveMaximum;