| Enumerator | Meaning | 
| UNIT_KIND_AMPERE | The ampere unit. | 
| UNIT_KIND_AVOGADRO | The unit dimensionlessmultiplied by the numerical value of Avogadro's
constant. (Only usable in SBML Level 3 models.) | 
| UNIT_KIND_BECQUEREL | The becquerel unit. | 
| UNIT_KIND_CANDELA | The candela unit. | 
| UNIT_KIND_CELSIUS | The Celsius unit. (Only usable in SBML Level 1 and SBML Level 2
Version 1 models.) | 
| UNIT_KIND_COULOMB | The coulomb unit. | 
| UNIT_KIND_DIMENSIONLESS | A pseudo-unit
indicating a dimensionless quantity. | 
| UNIT_KIND_FARAD | The farad unit. | 
| UNIT_KIND_GRAM | The gram unit. | 
| UNIT_KIND_GRAY | The gray unit. | 
| UNIT_KIND_HENRY | The henry unit. | 
| UNIT_KIND_HERTZ | The hertz unit. | 
| UNIT_KIND_ITEM | A pseudo-unit representing a
single "thing". | 
| UNIT_KIND_JOULE | The joule unit. | 
| UNIT_KIND_KATAL | The katal unit. | 
| UNIT_KIND_KELVIN | The kelvin unit. | 
| UNIT_KIND_KILOGRAM | The kilogram unit. | 
| UNIT_KIND_LITER | Alternate spelling of litre. | 
| UNIT_KIND_LITRE | The litre unit. | 
| UNIT_KIND_LUMEN | The lumen unit. | 
| UNIT_KIND_LUX | The lux unit. | 
| UNIT_KIND_METER | Alternate spelling of metre. | 
| UNIT_KIND_METRE | The metre unit. | 
| UNIT_KIND_MOLE | The mole unit. | 
| UNIT_KIND_NEWTON | The newton unit. | 
| UNIT_KIND_OHM | The ohm unit. | 
| UNIT_KIND_PASCAL | The pascal unit. | 
| UNIT_KIND_RADIAN | The radian unit. | 
| UNIT_KIND_SECOND | The second unit. | 
| UNIT_KIND_SIEMENS | The siemens unit. | 
| UNIT_KIND_SIEVERT | The sievert unit. | 
| UNIT_KIND_STERADIAN | The steradian unit. | 
| UNIT_KIND_TESLA | The tesla unit. | 
| UNIT_KIND_VOLT | The volt unit. | 
| UNIT_KIND_WATT | The watt unit. | 
| UNIT_KIND_WEBER | The weber unit. | 
| UNIT_KIND_INVALID | Marker used by libSBML
to indicate an invalid or unset unit. |