Codes 0000_0000 - 0000_0FFF are miscellaneous units that are not necessarily attributed to any physical property or no decernable or descrete measurement. There is currently no specific derivation to these codes, they are allocated ad-hoc.
Codes 0000_1000 - 0000_1FFF are the standard date/time codes used for time units and time stamps.
| Hex | Dec | UED label | Description |
| 0000 | 0 | UED_unitless | Measurements generally considered to be unitless |
| 0002 | 2 | UED_count | For simple counts (Note that this should not be used for things like blood pulse) |
| 0003 | 3 | UED_percent | I.e. Relative humidity, percent of population. |