> For the complete documentation index, see [llms.txt](https://docs.langstack.com/welcome/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.langstack.com/welcome/get-started/learn-langstack/using-triggers/after-update-trigger.md).

# After Update Trigger

* To create an After Update Trigger, click the \[+ After Update] button.

![](/files/RuODvxXCw1fpE6q6LIQF)

* When the After Update trigger is created, it has the following two (2) predefined variables:
  1. Variable Name: “Previous\_Revision”, Data Type: (the entity where the trigger is created). This variable contains the value of the entity record before the update.
  2. Variable Name: “Updated\_Record”, Data Type: (the entity where the trigger is created) This variable contains the value of the entity record after the update.

![](/files/D2T78HQXfMVmNOLfO5Qy)