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Object Diagram
Definition of objects
You define instance of objects using the object keywords.
@startuml
object firstObject
object "My Second Object" as o2
@enduml
Relations between objects
Relations between objects are defined using the following symbols :
| Type | Symbol | Image |
| Extension | <|-- |  |
| Composition | *-- |  |
| Aggregation | o-- |  |
It is possible to replace -- by .. to have a dotted line.
Knowing those rules, it is possible to draw the following drawings.
It is possible a add a label on the relation, using : followed by the text of the label.
For cardinality, you can use double-quotes "" on each side of the relation.
@startuml
object Object01
object Object02
object Object03
object Object04
object Object05
object Object06
object Object07
object Object08
Object01 <|-- Object02
Object03 *-- Object04
Object05 o-- "4" Object06
Object07 .. Object08 : some labels
@enduml
Adding fields
To declare fields, you can use the symbol : followed by the field's name.
@startuml
object user
user : name = "Dummy"
user : id = 123
@enduml
It is also possible to group all fields between brackets {}.
@startuml
object user {
name = "Dummy"
id = 123
}
@enduml
