Important: The UML static structure diagram is not available in Visio 2013 and newer versions. For information on UML diagrams in Visio 2013 and newer versions, see UML diagrams in Visio.
Add a discriminator label to a generalization
In a static structure diagram, double-click the Generalization shape you want to add a discriminator to.
In the UML Generalization Properties dialog box, for Discriminator, type the name of the discriminator you want, and then click OK.
Indicate a generalization relationship between UML elements
Drag a Generalization shape from the UML Static Structure stencil onto the drawing page near the classes or packages you want to relate.
Glue the endpoint near the arrowhead to a connection point on the more general element. Glue the endpoint without the arrowhead to a connection point on the more specific element.
Double-click the Generalization shape. In the UML Generalization Properties dialog box, add a name, stereotype, discriminator, and other property values, and then click OK.
To indicate a generalization for an association, use the Association Class shape rather than the Binary Association shape.