# EventParametersProperty

*[Event-based policies only]* Specifies an event that activates an event-based policy.

- Source: Generated code
- Type last changed: v2.93.0 · 23 Aug 2023

## Example

```ts
// The code below shows an example of how to instantiate this type.
// The values are placeholders you should change.
import { aws_dlm as dlm } from 'aws-cdk-lib';
const eventParametersProperty: dlm.CfnLifecyclePolicy.EventParametersProperty = {
  eventType: 'eventType',
  snapshotOwner: ['snapshotOwner'],

  // the properties below are optional
  descriptionRegex: 'descriptionRegex',
};
```

## Properties

- `descriptionRegex`: string — The snapshot description that can trigger the policy.

  The description pattern is specified using a regular expression. The policy runs only if a snapshot with a description that matches the specified pattern is shared with your account.

  For example, specifying `^.*Created for policy: policy-1234567890abcdef0.*$` configures the policy to run only if snapshots created by policy `policy-1234567890abcdef0` are shared with your account.

- `eventType`: string (required) — The type of event.

  Currently, only snapshot sharing events are supported.

- `snapshotOwner`: string[] (required) — The IDs of the AWS accounts that can trigger policy by sharing snapshots with your account.

  The policy only runs if one of the specified AWS accounts shares a snapshot with your account.