In your application, select Manage, and then Data Sets.
Select a data set, then click Actions, and then New or Edit.
On the Attributes tab, every attribute has a key identifier and an assign workflow:
In the Name, a Key Identifier labels an attribute as the unique key for the data set table. Generally, the unique key is a single attribute; however, the application supports multiple-attributes as unique key.
The check box option to “assign workflow” to Entity.
Click New, and then Add Attributes from Dimensions.
Select a Dimension.
Select attributes from the Available Attributes list and Move them to the Selected Attribute list.
The system includes the key attribute of the dimension as a Selected Attribute. You cannot clear the key attribute.