# About this guide

This guide helps you upgrade your Discovery Framework implementation by describing the major changes between version 1.5 of the Discovery Framework software and earlier versions. The guide is separated into these main sections:

- Upgrading to Version 1.5: This section contains general upgrade instructions.
- Required Changes: You must make the changes specified in this section if they apply to your application.
- Behavioral Changes: This section describes changes that do not require action on the developer's part, but will affect how your Endeca application behaves after you upgrade.

Related information
Upgrading Discovery Framework to Version 1.5
Required changes
Behavioral changes