What is an Internal Entity Extension?

An Internal Entity Extension refers to a specific type of extension that is created by Guidewire to enhance and add functionality to applications within the Guidewire platform. This means that the functionality provided by an Internal Entity Extension is built-in to the system and is designed to support the core operations and features of Guidewire applications.

By being a Guidewire-created extension, it typically adheres to the standards and practices established by the platform, ensuring compatibility and stability within the environment. This kind of extension allows developers to utilize pre-defined structures and behaviors that are already integrated into the Guidewire software, making it easier to implement complex functionalities without needing to build everything from scratch.

In contrast, a user-defined custom extension would imply a creation that is unique to a specific user's needs, potentially lacking the integrated advantages of the Guidewire ecosystem. External scripts modifying entities are also not relevant, as they are not part of the internally managed extensions provided by Guidewire. Lastly, while changeable application features can be an aspect of extensions, those features do not specifically capture the essence of what constitutes an Internal Entity Extension as clearly as the notion of it being a Guidewire-created extension does.