> 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/pdia-data-integration/10.2-data-integration/pdi-transformation-steps-reference-overview/regex-evaluation/general/capture-group-fields-table.md).

# Capture Group Fields table

Use the **Capture Group Fields** table to specify the new fields for the substrings captured by the regular expression from the input string.

| Column        | **Description**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
| ------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **New field** | Name of the new field generated from the regular expression.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
| **Type**      | Type of data.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| **Length**    | Length of the field.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
| **Precision** | Number of floating point digits for number-type fields.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| **Format**    | An optional mask for converting the format of the original field. See [Common Formats](/pdia-data-integration/10.2-data-integration/pdi-transformation-steps-reference-overview/common-formats.md) for information on common valid date and numeric formats you can use in this step. **Note:** Format is only applied when converting a non-string data type to a string data type. Values of non-string data types, such as Number and Date, should be passed with their corresponding format, as there is no string output for this step in those cases. |
| **Group**     | A grouping can be a "`,`" (`10,000.00` for example) or "`.`" (`5.000,00` for example)                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| **Decimal**   | The character used as a decimal point.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
| **Currency**  | Currency symbol (`$` or `€` for example)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| **Null If**   | Treat this value as null.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
| **Default**   | Default value when the field in the incoming file is not specified (empty).                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| **Trim**      | The trim method to apply to a string.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |

See \[Understanding PDI data types and field metadata]\(../../../../Data%20Integration%20Perspective/Data%20Integration%20perspective%20in%20the%20PDI%20client/Advanced%20topics%20(PDI%20perspective)/Understanding%20PDI%20data%20types%20and%20field%20metadata.md) to maximize the efficiency of your transformation and job results.


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