# 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/evaluate-downgrading-oracle-edition/evaluate-downgrading-oracle-edition.rss).

| Change | Description | Date | 
| --- |--- |--- |
| [Multiple updates](#doc-history) | On the [Prerequisites](https://docs.aws.amazon.com/prescriptive-guidance/latest/evaluate-downgrading-oracle-edition/prereq.html) page, Amazon RDS Custom for Oracle was added as a source option. On the [AWS tools and other services](https://docs.aws.amazon.com/prescriptive-guidance/latest/evaluate-downgrading-oracle-edition/tools.html) page, information was added about AWS-developed tooling and scripts. | October 24, 2023 | 
| [Initial publication](#doc-history) | — | June 30, 2022 |