Distributed Action Handler 12.13

# BIASVAL

The `BIASVAL` field specifier (case sensitive) allows you to bias the score of result documents by a specified percentage, based on whether they include a specific value in the specified field.

NOTE: You can only use `BIASVAL` when the field is configured as:

- `MatchType`

- `ParametricType`, when the `ParametricNumericMapping` configuration parameter is set to `True`.

## Format

    FieldText=BIASVAL{fieldValue,percentBoost}:fieldName

`fieldValue` | The value that the specified field must contain to increase or decrease the weight by the `percentBoost`.
`percentBoost` | A percentage in the range -100 to 100. The percentage (positive or negative) by which to boost the relevance of documents that have the value `fieldValue` in the field `fieldName`. (The boosted relevance score cannot be greater than 100% or less than -100%.) When you set `AbsWeight` to `True`, this is the absolute value by which to boost the weight and it is then not limited by +/- 100.
`fieldName` | The name of the field that must be present (and must contain the proper value) for the document relevance to be boosted.

## Example

    FieldText=BIASVAL{Cambridge,10}:TOWN

A document whose `TOWN` field value is `Cambridge` has its weighting increased by 10% (although the weighting cannot go over 100%).

    FieldText=BIASVAL{Cambridge,10}:TOWN+BIASVAL{London,-10}:TOWN

A document whose `TOWN` field value is `Cambridge` has its weighting increased by 10%, and a document whose `TOWN` field value is `London` has its weighting decreased by 10%. This example shows that biases can be negative as well as positive, and that you can include more than one set of parameters with the specifier.

© Copyright 2022 Micro Focus or one of its affiliates
Version 12.13 | Last updated October 2022

Send documentation feedback

Close

Send documentation feedback

To send feedback using your default email client, open an email window.

Otherwise, send your feedback and the information below to swpdl.idoldocsfeedback@microfocus.com.

We appreciate your feedback!

Product: IDOL Distributed Action Handler 12.13

Topic Title: BIASVAL