Tagged Values

tagged_value_types

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What is a Tagged Value

Tagged Values are a convenient way of adding additional information to an element, beyond what is directly supported by UML. The UML specification provides the Tagged Value element for just this purpose.

Often Tagged Values are used during code generation or by other tools to pass information or operate on elements in particular ways. Tagged Values are the preferred method of extending the code generation capabilities of the modeling tool per element / per language.

A Tagged Value, strictly, is the value of a property of a modeling item, the property being called a tag. For example, a Class element called Person might have a tag called Age with the Tagged Value of 42. The combination of tag and value, however, is often referred to as a Tagged Value.

Enterprise Architect defines a Tagged Value Type, which constrains the possible values of a tag and can specify how a value is assigned to the tag. For example, the tag Age might have a Tagged Value Type of Integer, so the user simply types in a numeric value. Alternatively, the type could be Spin, with lower and upper limits of, say, 20 and 120, so the user sets a value by clicking on arrows in the field to increment or decrement the value within the limits of 20 and 120.

To quickly add Tagged Values to one of more elements, see the Quick Start -  Add Tagged Value to Elements topic.

 

Tagged Value Type

Quick Start - Add Tagged Value to Elements

The Tagged Values Window

The Tagged Values window is used to view and modify Tagged Values for the currently selected modeling item, either in the current diagram or in the Project Browser.

The Tagged Values window is a dockable window. You can use it to perform the following actions:

Assign a Tagged Value to an Item
Modify Tagged Values
Assign Notes to a Tagged Value
Perform advanced tag management

 

A Technology Developer can also create new structured Tagged Values, reference data Tagged Values and custom Tagged Values from predefined Tagged Value Types.

 

Assign a Tagged Value to an Item

Modify Tagged Values

Assign Notes to a Tagged Value

Perform Advanced Tag Management

Custom Tagged Values

Tagged Value Types

Model Elements and Features with Tagged Values

The following model components can use the Tagged Values window as a convenient way to quickly view and modify Tagged Values:

Component

Description

Elements

Elements display their own Tagged Values along with any inherited values.

 

Object Instances

Object Instances display owned tags and those obtained from their classifier.

 

Ports and Parts

Ports and parts display information similar to objects and display Port/Part 'Type' instead of a classifier.

Tags are included for all parents and other structures of the Ports type.

 

Attributes

Include owned Tagged Values and those received from attribute type classifiers, with the inclusion of any inherited ones.

 

Operations

Owned properties only.

 

Connectors

Owned properties only.

 

When over-riding an inherited property, Enterprise Architect copies the tag from the parent down to the child element and sets the new value, leaving the original tag unchanged.

 

 

Tagged Values Toolbar Buttons

The buttons in the Tagged Values toolbar enable you to add, edit, sort, delete and arrange the Tagged Values of model features
 

Toolbartaggedvalues
 

From left to right, the button functions are as follows:

The Show in compartments button displays the Tagged Values in element compartments on diagrams
The Sort and Show Alphabetically button sorts the current Tagged Values for the element alphabetically
The New Tagged Value button adds a new tag, to which you assign a value
The Edit Tagged Value Notes button enables you to create notes that explain the purpose of the Tagged Value
The Delete Tagged Value button removes the currently selected Tagged Value
The Default Tagged Value Types button enables quick access to tag definitions created in the Configuration menu
The Tagged Value Options button enables you to show or hide the fully qualified paths for the Tagged Values in the window, and to show duplicate Tagged Values
The Help button displays help relating to use of the Tagged Values window
 

 

 

Learning Center topics

(Alt+F1) | Enterprise Architect | Getting Started | Basic Tasks | Add A Tagged Value