What is the best practice for naming new display keys in Guidewire?

In Guidewire, the best practice for naming new display keys is to add the _Ext suffix to all new display keys. This convention helps in clearly identifying that a display key has been extended beyond its original purpose. By following this naming convention, developers can easily recognize the keys that have been added or modified, which supports better maintainability and clarity in the codebase.

Using the _Ext suffix distinguishes these display keys from standard ones, indicating that they might provide additional functionality or cater to specific business requirements. This practice enhances collaboration among developers and makes it easier to manage updates or changes to the system since they will be able to quickly identify which elements are standard versus those that have been custom-built for specific use cases.

The approach of not requiring any specific suffix or using alternative suffixes such as _New or _Key could lead to confusion, making it harder to tell at a glance which display keys are custom additions, potentially complicating file readability and future maintenance efforts.