---
schema_version: "1"
id: 3ec751f02f8922a470e8b2a976b9a6e853cd240281ba875f70d58b8a65fee91e
title: Create a Data Classification Rule
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/mktg/264-0-0/dato_harmonize_classify_create.md
canonical_url: https://help.salesforce.com/s/articleView?id=mktg.dato_harmonize_classify_create.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: 330af7102631eb05949332407c92e88e1995125c8d93942da7ea285f845e7c06
description: Create a classification rule to classify your data. You can upload a classification file or define the classification from scratch.
products:
  - Marketing
  - Marketing Cloud Intelligence
release: "264"
---
# Create a Data Classification Rule

Create a classification rule to classify your data. You can upload a classification file or define the classification from scratch.

### Required Editions

<table class="slds-table slds-table_bordered slds-max-medium-table_stacked slds-m-bottom_small permission">
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            <th scope="colgroup" class="slds-cell-wrap" colspan="2" style="text-align:center;vertical-align:top;" id="d79051e38">User Permissions Needed</th>
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            <td data-label="User Permissions Needed" class="slds-cell-wrap" style="vertical-align:top;" headers="d79051e38 ">To create a classification rule:</td>

            <td class="slds-cell-wrap" style="vertical-align:top;" headers="d79051e38 ">Admin</td>

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1. From the **Connect & Mix** tab, select **Harmonization Center** and then **Data Classification**.
2. Click **Add New**.
3. Define the classification rule:
    
    ![Create classification rule panel](https://sf-zdocs-cdn-prod.zoominsoftware.com/tdta-mktg-salesforce_datorama-264-0-0-production-enus/d38a342d-dd4a-4af8-8343-f372280a75dd/salesforce_datorama/images/harmonize/dato_harmonize_classify.png)
    
    1. Enter a name (1).
    2. Select the dimension the classification rule applies to (2).
        
        ![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 Custom dimensions can’t be used in Classification Rules.
    3. Upload a classification file or create one (3).
    4. Determine what to do with unclassified values (4.).
        
        <table class="slds-table slds-table_bordered slds-max-medium-table_stacked slds-m-bottom_small "><tbody><tr class=""><td class="slds-cell-wrap"><strong class="uicontrol">Default String</strong></td><td class="slds-cell-wrap">Select to return a default string whenever unclassified values are found. You can change the string if necessary.</td></tr><tr class=""><td class="slds-cell-wrap"><strong class="uicontrol">Return Source Dimension</strong></td><td class="slds-cell-wrap">Select if you don’t want the unclassified values to be aggregated.</td></tr></tbody></table>
    5. After the classification loads, set the Key and Value columns and control the way Marketing Cloud Intelligence classifies the values.
4. Click **Done**.
    
    After the classification rule is created, a data stream is created automatically.

#### See Also

- [Create a Classification File from Scratch](https://help.salesforce.com/s/articleView?id=mktg.dato_harmonize_classify_files_create.htm&release=264.0.0&type=5 "When creating classification rules you either upload a classification file or you create it from scratch. The file tells Marketing Cloud Intelligence how to classify your data.")
- [Configure Classification Rules](https://help.salesforce.com/s/articleView?id=mktg.dato_harmonize_classify_configure.htm&release=264.0.0&type=5 "After you upload or create a classification file using data classification, customize and configure the columns in your file. Determine which column is the Key column and which is the Value column. Control the way the system recognizes values in your file as well.")