3. Values (值)

A JSON value MUST be an object, array, number, or string, or one of the following three literal names:

JSON值必须(MUST)是对象、数组、数字或字符串，或以下三个字面量名称之一：

false null true

The literal names MUST be lowercase. No other literal names are allowed.

字面量名称必须(MUST)是小写。不允许其他字面量名称。

value = false / null / true / object / array / number / string

false = %x66.61.6c.73.65   ; false

null  = %x6e.75.6c.6c      ; null

true  = %x74.72.75.65      ; true