Attributes

Attributes define the properties or internal data elements of an element. Not all element types support attributes, and others have restrictions; for example, attributes of Interfaces must have Public scope. In the Project Browser, elements with attributes (typically Classes) have their attributes listed under the element name, each preceded by a blue box (). When depicted in diagrams, the attributes are listed in the first properties compartment of the element, as shown in this Customer Class example.

Attributes themselves have several important characteristics, such as type, scope (visibility), derivation and notes.

Access Right-click element in diagram | Features and Properties | Attributes (F9)  or

Right-click element in Project Browser | Attributes

Maintain Attributes

Action

Detail

See also

Create and Modify Attributes

On the 'Attributes' page of the '<element name> Features' dialog, you create and modify attributes using the various panels and tabs.

Attribute Constraints Attribute Tagged Values Attribute Details Create and Manage Attributes

Move and Copy Attributes

You can copy or move existing attributes between elements, if the target element also supports attributes.

Move Features Between Elements Copy Features Between Elements The Element Browser

Define Properties

You can create  property implementations specific to your coding languages for each attribute.

Create Properties

Identify Inherited Attributes

The attributes of an element can be inherited from one or more successive parent elements in the model. On a diagram, you can show which attributes are inherited from which 'owning' element in the hierarchy.

Display Inherited Attributes

Notes

  • Attributes, with Operations, are collectively referred to as Features of an element
  • If you are creating many attributes, go to the 'Attribute/Operations' page of the 'Options' dialog ('Tools | Options | Source Code Engineering | Attribute/Operations') and de-select the 'After save, re-select edited item' checkbox; now, when you create an attribute and click on the Save button, the 'Attribute' page fields clear ready for you to enter the details of the next attribute - this helps you when you want to create attributes quickly and might not necessarily want to fully define each one as you create it
  • If the parent element provides source or target roles for a connector, the connector can be attached to a specific attribute (as a feature)
  • An alternative method of creating relationships between elements and attributes is to drag an attribute onto an Activity diagram, which generates an Object element named after the attribute; you then create relationships to and from this Object element

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