Functions / Transformations

Overview

Transformation functions in JENTIS allow you to process and modify data before it is sent to a destination (e.g., analytics tools, marketing platforms). These functions take a single input and return a transformed output — both of type String.

How to Create a Custom Function

Creating a custom transformation is simple. All you need is a JavaScript function that:

• Accepts one input parameter of type String

• Returns an output value of type String

Example:

function myTransformation(input) {
  return input.toLowerCase();
}

This function would take a string (e.g., "MyValue") and return it in lowercase ("myvalue").

Common Use Cases

Transformation functions can be used for a wide range of purposes, such as:

• Converting strings to lowercase

• Removing all whitespace from a string

• Filtering out disallowed URL parameters

• Matching and transforming values based on a specific syntax or pattern

These transformations are especially useful for data cleaning, formatting, or standardization before sending the data to third-party tools.

Built-In Functions: Anonymization & Pseudonymization

The JENTIS system provides built-in support for Anonymization and Pseudonymization functions, which can be directly applied in the Tag Edit View.

• Anonymization: Generates a random output each time, preventing traceability.

• Pseudonymization: Generates a consistent but obfuscated output per tool, ensuring format similarity while preserving privacy.

To learn more about these privacy-focused transformations, see the Built-In Functions: Anonymization & Pseudonymization Guide.