# SlotValueRegexFilterProperty

Provides a regular expression used to validate the value of a slot.

- 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_lex as lex } from 'aws-cdk-lib';
const slotValueRegexFilterProperty: lex.CfnBot.SlotValueRegexFilterProperty = {
  pattern: 'pattern',
};
```

## Properties

- `pattern`: string (required) — A regular expression used to validate the value of a slot.

  Use a standard regular expression. Amazon Lex supports the following characters in the regular expression:

  - A-Z, a-z
  - 0-9
  - Unicode characters ("\⁠u<Unicode>")

  Represent Unicode characters with four digits, for example "\⁠u0041" or "\⁠u005A".

  The following regular expression operators are not supported:

  - Infinite repeaters: *, +, or {x,} with no upper bound.
  - Wild card (.)