# BarcodeTextRegExPattern

Parameter `BarcodeTextRegExPattern` defines the regular expression pattern of barcode text characters for barcodes searching and result filtering.

## JSON Structure

**Location in template:**
```
BarcodeFormatSpecificationOptions[i]
    └── BarcodeTextRegExPattern
```

**Parent object:** [BarcodeFormatSpecification](https://www.dynamsoft.com/capture-vision/docs/core/parameters/file/auxiliary/barcode-format-specification.md) object

**Example:**

```json
{
    "BarcodeTextRegExPattern": " ^([*].+[*]|[+].+[+])$"
}
```

> [!NOTE]
> - This snippet shows only the `BarcodeTextRegExPattern` parameter.
> - To use it, embed this parameter within a [BarcodeFormatSpecification](https://www.dynamsoft.com/capture-vision/docs/core/parameters/file/auxiliary/barcode-format-specification.md) object.
> - For the complete JSON structure, see:
>   - [Full JSON Structure](https://www.dynamsoft.com/capture-vision/docs/core/parameters/file/index.md#full-json-structure)
>   - [Minimal Valid JSON](https://www.dynamsoft.com/capture-vision/docs/core/parameters/file/index.md#minimal-valid-json-example)

## Parameter Details

`BarcodeTextRegExPattern` is set to an empty string by default which means there is no limitation on the barcode text characters. The structure of the `BarcodeTextRegExPattern` is shown as follow:

| BarcodeTextRegExPattern  Parameter Details |
| :--------------------------------- |
| **Type**<br>*string* |
| **Range**<br>N/A |
| **Default Value**<br>"" |