This wizard is used to create Meta Entities, Meta Entities Type, or Meta Data Aggregates. Some of its fields are specific to an entity type.
If you are maintaining a Pacbase application, selecting a package is not advised. The instance override mechanism is then made easier because the overriding instance is always in the same package as the overridden instance. You do not need to manage the presence of both the instances in the same package, which is the requirement of an override.
A project represents the physical distribution of your instances in your workspace. It groups directories and files. It is used to organize resources that can be built, shared, or versioned.
A Pacbase project contains a subset of file that correspond to the models and the generated sources that constitute an application.
When a Meta Entity Type is created, a new tab is added to the editors of the entities that it extends. For example, if you select Program in the Type field when you create a Meta Entity Type, a new tab is displayed in the editor of all the Program instances. This tab is named after the label of the Meta Entity Type.