CoreandServices.book - Ocean - Schlumberger

Units
Below is an example using IUnitSystem:
...
// Get the unit service settings
IUnitServiceSettings uss;
uss = CoreSystem.GetService();
// Get the current catalog
IUnitCatalog currentCatalog = uss.CurrentCatalog;
// Get the measurement for Inside Diameter
IUnitMeasurement m = catalog.GetUnitMeasurement(“Inside Diameter”);
// Get the current unit system
IUnitSystem unitSystem = uss.InvariantSystem;
// Get the units for Inside Diameter from the unit system.
IUnit units = unitSystem.GetUnit(m);
...
Custom Unit Systems
You can define custom unit systems in your module. A custom unit system allows the
module to control the default mapping between measurements and units. You only need
to provide a mapping between the measurements and units you care about.
Measurements not in your custom unit system will be mapped to units as defined by the
IUnitServiceSettings.InvariantSystem unit system. This is the unit system
initialized in memory when the product family implements IUnitServiceSettings in
the module Initialize lifecycle step.
You create a custom unit system by providing a name, description, and dictionary that
maps the units to measurements. The custom unit system will only be available in memory
and cannot be saved to the catalog. It should be set up in the modules Integration
step. The unit service does not provide a method to persist the new custom unit system. It
is the responsibility of the product family to persist the custom unit system should it be
required by the application.
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