Description: Units of measurement used in representing the data in the ThermoML files.
- id: units primary key (auto-generated and unique)
- name: the unit name
- symbol: the unit symbol
- type: the system of units the unit belongs too
- exact: is the conversion factor in the
factorfield, exact or not - factor: numeric value of the conversion factor used to convert to the SI equivalent unit
- si_equivalent: the SI equivalent of the unit
- qudt: the QUDT encoding string for the unit
- updated: datetime last updated