Working With Model Items and Diagrams > Working with diagrams > Diagram types > Object diagram
Object diagram
For information about instance modeling in Modeler, see Overview of instance modeling.
An Object Diagram shows a complete or partial view of the structure of a modeled system at a specific time. This snapshot focuses on some particular set of Class, Data Type, Interface or Signal instances and attributes. A correlated set of object diagrams provides insight into how an arbitrary view of a system is expected to evolve over time. Object Diagrams are more concrete than class diagrams, and are often used to provide examples, or act as test cases for the Class Diagrams. You can have many Object Diagrams in a model.
You can create an Object Diagram through the context menu of the Model or a Package: right-click the Model or a Package, point to New, point to UML, point to Structure, and then click Object Diagram.
The following sections provide information about how an Object Diagram is used in the model. For more information about an item, property or model part, click it.
Shows these dictionary items
Like most diagrams, an Object Diagram can show variability items and relationships. See Overview of variability items and relationships on diagrams.
For most diagram symbols, you can change the presentation of the symbol through the Style view options (See Style view options - all diagrams), and change the showing of Stereotypes and Tag Definitions through the Stereotypes view options (See Stereotypes view options for a symbol - all diagrams). When a symbol has additional view options for changing its presentation, this icon is shown - to see how the view options can change the presentation, click the icon.
IO Flow
Slot (on Instances)
These items (which are not documented in the reference topics) can also appear on an Object Diagram:
Frame Box - provides a way of adding a box or background image to the diagram.
Note - provides a way of adding text to the diagram.
Note Link - links a Constraint, Comment or Note to an item on the diagram.
An Object Diagram has these properties:
Full Name
Last Changed By
Last Changed On
Page Reference
Owned by
Used in these parts of the model
Instance Model
Can be linked to these dictionary items