To access object classes, additions, order additions, and keys, which data dictionary should be used?

The correct choice is based on the specific functionality of the data dictionary in the context of Avaloq. The "extn" data dictionary is specifically designed for extensions to existing object classes, additions to those object classes, and for order additions and keys. This means that when working with any elements that are meant to enhance or extend the base functionality provided by the Avaloq system, the "extn" data dictionary is the go-to resource.

Using the "extn" dictionary allows developers and users to access and manipulate the structures that have been added to the base application, ensuring that they can work effectively with all necessary elements when customizing or extending functionalities. This dictionary provides access to a wider range of attributes and components that are not available in the core or basic dictionaries, which focus primarily on standard definitions without the extensions that "extn" provides.