MQTYPE_* (Property data types)
| MQTYPE_AS_SET | 0 | X'00000000' |
| MQTYPE_NULL | 2 | X'00000002' |
| MQTYPE_BOOLEAN | 4 | X'00000004' |
| MQTYPE_BYTE_STRING | 8 | X'00000008' |
| MQTYPE_INT8 | 16 | X'00000010' |
| MQTYPE_INT16 | 32 | X'00000020' |
| MQTYPE_INT32 | 64 | X'00000040' |
| MQTYPE_LONG | 64 | X'00000040' |
| MQTYPE_INT64 | 128 | X'00000080' |
| MQTYPE_FLOAT32 | 256 | X'00000100' |
| MQTYPE_FLOAT64 | 512 | X'00000200' |
| MQTYPE_STRING | 1024 | X'00000400' |