{"op":"or","args":[{"op":"isNull","args":[{"property":"value"}]},{"op":"between","args":[{"property":"value"},10,20]}]}
((value IS NULL) OR (value BETWEEN 10 AND 20))
{"op":"or","args":[{"op":"isNull","args":[{"property":"value"}]},{"op":"between","args":[{"property":"value"},10.0,20.0]}]}