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Use the Tagged Value Connector

A common situation when creating a profile is where instances of one stereotype need to reference elements with another stereotype applied. For example, an element that defines a Collection might have a Tagged Value called rootNode to identify the Root of that Collection, which will be a Class with the stereotype <<Node>>. In the Tagged Values window, the user would click on the selection button (  ...  ) against the rootNode Tagged Value; when the Select <Item> dialog displays, the user can locate all Nodes in the current model, and select one of these elements as the value of the tag.

To achieve this, you use the Tagged Value connector, from the Profile pages of the Toolbox. A Tagged Value connector defines a reference-type (that is, RefGUID) Tagged Value owned by the source stereotype; the Tagged Value name is the name of the target role of this connector, and the Tagged Value is limited to referencing elements with the stereotype of the target element.

The following diagram demonstrates how you might use the connector to create the example above. A Profile defines two stereotypes: �Collection� and �Node� (both of which extend the Metaclass Class). The �Collection� stereotype owns a Tagged Value connector with the target role rootNode, pointing to the �Node� stereotype. You enter the target role name on the Target Role page of the connector Properties dialog.



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