Now, Amazon Cloud Directory makes it easier for you to apply schema changes across your directories with in-place schema upgrades. Your directories now remain available while backward-compatible schema changes are being applied, such as the addition of new fields. This means you can upgrade your schemas without migrating data between directories or applying code changes to your applications. You also can view the history of your schema changes in Cloud Directory by using both major and minor version identifiers, which can help you track and audit schema versions across directories.