An Object diagram shows the existence of objects, their
relationships
in the logical view of the system and how they execute a particular
scenario
or use case.
Object Diagram, also called instance diagram shows an overview of a
system.
Using the Object diagram model, you describe the static structure of
the
symbols in your system.
The elements of the Object diagram are available in the tool bar:
New Instance can be created by
selecting the icon in the toolbar.
New association between
instances can be created by selecting the icon in the toolbar.
New flow indicates
how an instance is created (stereotype copy) or shows a change in state
(stereotype
become).
The file deployment diagram extension is *.uod.