> For the complete documentation index, see [llms.txt](https://docs.pentaho.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.pentaho.com/pdc-10.2-data-optimizer/pdso-management/pdso-use-rules/pdc-rule-definitions/pdc-deleting-a-rule-definition.md).

# Deleting a rule definition

You can delete a rule definition that is no longer needed. You can only delete rule definitions that are not currently being used by a metadata rule.

Perform the following steps to delete a rule definition:

1. Click **Management** in the left navigation menu.

   The Manage Your Environment page opens.
2. On the **Metadata Rules** card, click **Definitions**.

   The Rule Definitions tab opens.
3. Locate the name of the rule definition that you want to delete and select its check box.
4. Click **Delete**.

   If the rule definition you are trying to delete is attached to a metadata rule, the rule definition cannot be deleted, and you get a notification asking you to unlink the definition from all associated metadata rules before you can proceed.

The rule definition is deleted, and a confirmation message appears in the upper corner of the page.


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