Create a Domain-Based Attribute (Master Data Services)
Applies to: 
SQL Server - Windows only
Azure SQL Managed Instance
In Master Data Services, create a domain-based attribute to populate an attribute's values with members from an entity.
Prerequisites
To perform this procedure:
You must have permission to access the System Administration functional area.
You must be a model administrator. For more information, see Administrators (Master Data Services).
An entity must exist to use as the source of the attribute values. For example, to create a domain-based attribute based on the Color entity, you must first create the Color entity. For more information, see Create an Entity (Master Data Services).
An entity must exist to create the attribute for. For more information, see Create an Entity (Master Data Services).
Attribute Information
For each created attribute, a row with seven columns is added to the grid. The following table describes the columns.
| Column | Description |
|---|---|
| Status | The attribute status. When you click Save, the  image displays, indicating that the attribute is updating.If there are errors when creating or editing an attribute, the  image displays.Otherwise, the status is OK and the  image displays. |
| Name | The attribute name. |
| Display Name | The attribute display name. |
| Description | The attribute description. |
| Display Pixel Width | The attribute width. |
| Type and Properties | The type and data type information of the attribute. |
| Enable Change Tracking | Specifies whether the attribute is enabled for change tracking and shows the group number in parentheses. |
When you click an attribute, the following information displays.
Created By: The name of the user who created the attribute.
On: The date and time when the attribute was created.
Updated By: the name of the user who last updated the attribute.
On: The date and time when the attribute was last updated.
To create a domain-based attribute
In Master Data Manager, click System Administration.
On the Manage Models page, click a model, and then click Entities.
On the Manage Entities page, select the row for the entity that you want to create an attribute for.
Click Attributes.
On the Manage Attributes page, do one of the following and then click Add.
If the attribute is for leaf members, select Leaf from the Member Types list box.
If the attribute is for consolidated members, select Consolidated from the Member Types list box.
If the attribute is for collections, select Collection from the Member Types list box.
In the Name box, type a name for the attribute. For a list of words that should not be used as attribute names, see Reserved Words (Master Data Services)
Optionally, type a display name, and type a description in the Description box.
In the Display pixel width box, type the width of the attribute column to be displayed in the Explorer grid.
From the Attribute type list, select Domain-based.
From the Domain Entity list, choose the entity to be used to populate the attribute values.
Optional, for domain-based attributes for leaf members. Select a filter parent attribute that is used to constrain the allowed values for the domain-based attribute.
The filter parent attribute must be another domain-based attribute for a leaf member, within the same entity. A derived hierarchy must exist with a level that defines the parent-child relationship between the domain entities of the two attributes.
For information about constraining the allowed values, see How to filter Domain Based Attribute drop down lists, on the Master Data Services blog.
Optional. Select Enable change tracking to track changes to groups of attributes. For more information, see Add Attributes to a Change Tracking Group (Master Data Services).
Click Save.
See Also
Domain-Based Attributes (Master Data Services) Create a Derived Hierarchy (Master Data Services) Change an Attribute Name and Data Type (Master Data Services) Delete an Attribute (Master Data Services)