# Document history
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The following table describes significant changes to this guide. If you want to be notified about future updates, you can subscribe to an [RSS feed](https://docs.aws.amazon.com/prescriptive-guidance/latest/database-decomposition/database-decomposition.rss).

| Change | Description | Date | 
| --- |--- |--- |
| [Mainframe FAQ and AI tools](#doc-history) | We added the [Do these recommendations apply for monolithic mainframe databases?](https://docs.aws.amazon.com//prescriptive-guidance/latest/database-decomposition/faq-scope.html#do-these-recommendations-apply-for-monolithic-mainframe-databases) FAQ, and we added additional information about AI tools that you can use during database decomposition. | October 14, 2025 | 
| [Initial publication](#doc-history) | — | September 30, 2025 |