This task is used to load a model. This model may be a terminal model or a metamodel. The metametamodels are typically not loaded with this task since they come bundled with a model handler.
This task is used to save a model.
There is an exception for metametamodels, which are typically already available from the model handler. A metametamodel is referenced by a string composed of a percent character (i.e. '%') followed by the name of the model handler. For instance: '%EMF' refers to Ecore and '%MDR' refers to MOF 1.4.