Define the Relationship Type of an Attribute Relationship
You define the relationship type of an attribute relationship by using the Attribute Relationships tab in Dimension Designer, which can be accessed from SQL Server Data Tools (SSDT).
To set the relationship type of an attribute relationship
In Dimension Designer, open the dimension with which you want to work, and then click on the Attribute Relationships tab.
In the diagram or in the Attribute Relationships pane, right-click the attribute relationship, click Relationship Type, and then click either Flexible or Rigid.
To display the Attribute Relationships pane, click Show List Views on the toolbar.
In a flexible relationship, relationships between members change over time. In a rigid relationship, relationships between members do not change over time.