In Guidewire, how should new display keys be suffixed?

In Guidewire, new display keys are suffixed with "_Ext." This practice is aligned with the naming conventions that help to clearly distinguish extended or custom fields from the base keys defined in the system. By using this suffix, developers and users can quickly identify that the display key has been extended or customized, aiding in maintenance and reducing the chance of confusion when integrating with existing keys or functionalities.

The convention of suffixed names like "_Ext" is particularly significant in large applications where numerous keys might exist, as it clearly marks which items are part of customizations and which are part of the core system. This is important for code clarity, manageability, and ensuring that changes in the base system or during upgrades do not unintentionally affect custom functionality.