# Setting a data model in the Arbitration campaign

Available in...

* Cloud API Services Platform
* Cloud Big Data
* Cloud Big Data Platform
* Cloud Data Fabric
* Cloud Data Integration
* Cloud Data Management Platform
* Cloud Pipeline Designer Standard Edition
* Data Fabric
* Qlik Talend Cloud Enterprise Edition

Data models decide the structure of the data to be managed. They are used for the syntactic and semantic validation of data.

You can define the access permission per role to each of the attributes listed in a data model.

## Procedure

1. On the Add campaign page, click Data model and select from the model list the data structure you want to use in the Beta candidates campaign.

   The Data Model list gives access to all the data models that have been defined.
2. Select the buttons next to each of the attributes in the data structure to set permission per attribute and per data steward and define who can view which attributes.
   | Option | Description |
   | --- | --- |
   | ![Attribute is visible but not editable in the task list](https://help.qlik.com/talend/en-US/data-stewardship-user-guide/Resources/images/tds-icon-read_access.png) | Provides only a read access to the attribute in the data model.<br><br>This<br>type of access is useful if the data steward needs to access the information<br>to make a relevant decision but must not change the value, for instance<br>unique identifiers of other elements linked to the entity the steward is<br>viewing, or data that you know is reliable and must not be changed. |
   | ![Attribute is not visible in the task list](https://help.qlik.com/talend/en-US/data-stewardship-user-guide/Resources/images/tds-icon-no_access.png) | Provides no access to the attribute.<br><br>Hiding an attribute is useful if<br>the information is sensitive and should not be visible by the data steward,<br>financial information for instance. Another example of attributes to be<br>hidden is if the information is just noise for the steward, technical<br>identifier for instance, but need to be propagated as part of the task. |

   ![Overview of the Data model step to create an Arbitration campaign.](https://help.qlik.com/talend/en-US/data-stewardship-user-guide/Resources/images/tds-set-arbitration-data-model.png)

## Example

In this example you have only the Nominator role. You want to make the technical identifier invisible to the stewards who are assigned the role and grant them a read access to all other attributes.