A range of predefined Tagged Values have been created in Enterprise Architect to enable you to rapidly create masked Tagged Values. This enables you to create structured tags that adhere to a specific format. For example, for model features that use the predefined tag Boolean you can use the Tagged Values window to assign a value of True or False and no other value, as described in the Enterprise Architect User Guide.

In addition, you can define a custom masked tag type, enabling you to define an almost unlimited number of structured tag types.