 | STEP (ISO/DIS 10303-41, S96 ff) stützt sich bzgl. SI-Einheiten auf die folgenden sieben Basis-Einheiten ab:
| | lenght (metre),
|
| | mass (gram),
|
| | time (second),
|
| | electric_current (ampere),
|
| | thermodynamic_temperature (kelvin),
|
| | amount_of_substance (mole; quantiy; compared to the number of atoms in 0.012 kilogram of carbon 12),
|
| | luminous_intensity (candela).
|
|