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A data type Data Type shape iconis an instance of the DataType metaclass defined in the UML metamodel. A data type declares a type of class attribute. That type is available as a string you can include when you define attributes for other elements in a model.

For example, you can use a data type to declare a Money type. Then, you can add price : Money as an attribute to a class called Order. The UML Model Diagram template in Microsoft Office Visio includes the common data types for C++, VB, IDL, and C#, and you can add data types of your own.

Name a Data Type shape and add other property values

Open the element's UML Properties dialog box by double-clicking the icon that represents the element in the tree view or the shape that represents the element in a diagram.


Control which property values display on a shape in a diagram by right-clicking the shape, and then clicking Shape Display Options. In the UML Shape Display Options dialog box, select and clear options to display or hide property values.

Hide the operations section of a Data Type shape

Right-click the shape, click Shape Display Options, and then, under Suppress, select Operations.

Control which property values are displayed on the Data Type shape

Right-click the shape, click Shape Display Options, and then select or clear options to show or hide values.

Navigate to other views of the data type

Right-click the shape, click Views, select the view you want, and then click OK.

Show, in a view, the relationships between the data type and other elements

Right-click the shape, and then click Show Relationships.

Select a heading below to open it and see the detailed information about properties for this shape.




Type a name for the data type.

Full Path

The UML Model Diagram template automatically provides full information about the element's path in the system model hierarchy. You can't edit this information but if you move elements the path automatically updates.


Choose the stereotype you want from the drop-down list. If a stereotype you want to use isn't listed, you can add a new stereotype or edit an existing one by clicking Stereotypes on the UML menu.


Choose the type of visibility (public, private, or protected) that applies to the data type.


Select to indicate that the data type can't have ancestors.


Select to indicate that the data type can't have descendants.


Select to indicate that the data type is abstract and that no instances can be created for the class.


Type any documentation you want to add to the element as a tagged value. When you select the shape or icon representing the element, the documentation you type here also appears in the Documentation window.

Use these properties to define an enumeration data type.

The Enumeration category becomes available when you select Enumeration as the stereotype for a data type (on the Datatype category in the UML Datatype Properties dialog box).



Enumeration Literals

Lists each enumeration and its literal value for the data type.

To quickly edit the enumeration name, click a field under Enumeration and type the name. To quickly edit the literal value, click a field under LiteralValue and type the value.


Click to create new enumerated literals.


Click to add a new enumeration to the list with the same property values as the selected enumeration.


Click to delete the selected enumeration from the list.

Move Up/ Move Down

After you select an enumeration, click to change the order in which the enumeration is stored. You can only reorder within the same data type.

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