Set of primitive values supported by the system. Note that for the
purposes of inspection or transformation, the number of bytes
considered to comprise a ‘Value’ is based on its representation as a
UTF-8 encoded string. For example, if ‘integer_value’ is set to
123456789, the number of bytes would be counted as 9, even though an
int64 only holds up to 8 bytes of data.
.. attribute:: type