The Updating an Existing DITA CMS Deployment (Update Guide) explains how to bring your deployment up to date to a more current build release. The build number of the software increases (for example, from 1.2.7 to 1.2.8) to introduce bug fixes, which means you must update the software for each component in your deployment with the newer version of the software to integrate those fixes.

If you are upgrading to a minor version (for example, from version 1.1 to 1.2) or to a major version (for example, from version 1.2 to 2.0), you must follow the instructions in Upgrading the DITA CMS to [version number] instead. An upgrade may require may require upgrades to the underlying framework, configuration changes, or upgrades to the DITA CMS components which are provided in that document.