Archived tweet #9996 from the @leastfixedpoint Twitter Archive@ArmyOfBruce @dustyweb Looks like it does! json-ld.org/spec/latest/js… The JSON syntax for "numbers" is defined as meaning either a "long" or a "double", depending on whether it has a non-zero fractional part or not. Sketchy and arguably misguided, but it's there.