Object as a Default Value (UML Diagramming)
Tutorials|Tips and Tricks|UML| 15 January 2020 | Dusan Rodina - softwareideas.net
Apart from literal values, you can set an instance as a default value of an attribute.
A lot of actions in Software Ideas Modeler may be done using drag & drop. It is also possible to set an instance specification as a default value of a classifier attribute. if you drop the instance over an attribute, the correct attribute type by the instance classifier will be set.
Setting an object instance as a default value of an attribute