---
schema_version: "1"
id: 32cc80c20efbea375e0246f77a828afa3b35d9924d546bba16943f7a4d143d7c
title: Transformation Rules
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/mktg/264-0-0/dato_data_transformation_rule.md
canonical_url: https://help.salesforce.com/s/articleView?id=mktg.dato_data_transformation_rule.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: 5cae7a078c911e85a1f822066c5201c511fce99b51d6089bfee53cfe7dac3dfb
description: Use transformation rules to set values to a specified attribute, based on a set of defined criteria. The rules can be set at the level of the entity key or name. Transformation rules are most effective when the entity key or name has a consistent naming convention.
products:
  - Marketing
  - Marketing Cloud Intelligence
release: "264"
---
# Transformation Rules

Use transformation rules to set values to a specified attribute, based on a set of defined criteria. The rules can be set at the level of the entity key or name. Transformation rules are most effective when the entity key or name has a consistent naming convention.

![Note](https://sf-zdocs-cdn-prod.zoominsoftware.com/tdta-mktg-salesforce_datorama-264-0-0-production-enus/d38a342d-dd4a-4af8-8343-f372280a75dd/images/icon_note.png)

Note This feature is a legacy feature and is only available if you’ve used it in the past. It’s highly recommended you use the Harmonization Center instead.

For more information, see [Harmonize Data with the Harmonization Center](https://help.salesforce.com/s/articleView?id=mktg.dato_harmonize_center.htm&release=264.0.0&type=5 "The Harmonization Center in the Connect & Mix tab, unifies, enriches, and validates your data in one place. In the Harmonization Center, create and manage your naming convention patterns, classifications, and harmonized dimensions.").

- **[Create Transformation Rules](https://help.salesforce.com/s/articleView?id=mktg.dato_data_transform_rule_create.htm&release=264.0.0&type=5)**  
    Create a transformation rule to set a value of a specific attribute, for example whenever the Campaign Key is set to 1234, the Campaign Type is set to Search.
- **[Set a Rules Method for Transformation Rules](https://help.salesforce.com/s/articleView?id=mktg.dato_data_transform_rule_method.htm&release=264.0.0&type=5)**  
    Rules run according to the Rules Method, which determines the type of the data the rules apply to. By default, the platform uses the Run Rules on New Data Only method, running rules on all the data uploaded to the workspace after the rule is created. The Rules Method affects all the workspace's transformation rules.