> ## 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. |