Definition:
A unique code which identifies the units of the defined data item. A description of the units is provided in _units_detail.Examples:
| K | kelvins |
| C | degrees Celsius |
| rad | radians |
| e | electrons |
| V | volts |
| Dal | daltons |
| m | metres |
| kg | kilograms |
| s | seconds |
Type: char
Category: units
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