> ## Documentation Index
> Fetch the complete documentation index at: https://docs.abbyy.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Key value hypothesis

> Key value hypothesis properties in an Extraction Rules activity — Static Text and White Gap secondary elements plus type-specific main element properties.

The Key Value element is a group element containing predetermined subelements. Formulation and evaluation of hypothesis for this element is carried out the same way as it is for the [Group](/vantage/documentation/advanced-designer/activities/formulating/group-hyp) element, with secondary element hypotheses having identical properties. Moreover, secondary element hypotheses have additional properties.

## Additional Static Text hypothesis properties

| Property | Description                                                                                        |
| :------- | :------------------------------------------------------------------------------------------------- |
| Keyword  | Lists keywords that are part of the hypothesis. A separate error count is displayed for each word. |

## Additional White Gap hypothesis properties

| Property                            | Description                                                                                                                 |
| :---------------------------------- | :-------------------------------------------------------------------------------------------------------------------------- |
| Orientation                         | Specifies the orientation of the detected white gap.                                                                        |
| Histogram maximum in search area    | Specifies the maximum histogram value in the search area.                                                                   |
| White Gap threshold                 | Specifies the calculated threshold for the histogram, over which the white gap will no longer be considered to be detected. |
| Histogram maximum within hypothesis | Specifies the maximum histogram value within the white gap hypothesis region.                                               |

## Additional main element hypothesis properties

Additional main element hypothesis properties can have varying properties depending on element type:

| Field type           | Property      | Description                          |
| :------------------- | :------------ | :----------------------------------- |
| **Any Text**         | Text          | Text that is part of the hypothesis. |
| **Number**           | Text          | Text that is part of the hypothesis. |
| **Amount of Money**  | Value         | Detected numeric value.              |
| **Amount of Money**  | Currency name | Detected currency name.              |
| **Date**             | Day           | Day.                                 |
| **Date**             | Month         | Month.                               |
| **Date**             | Year          | Year.                                |
| **Phone**            | Number        | Detected telephone number.           |
| **Phone**            | Keyword       | Detected prefix keyword.             |
| **Character String** | Text          | Text that is part of the hypothesis. |