Object diagram

An object diagram ( engl. object diagram ) is one of the 14 chart types in the Unified Modeling Language ( UML), a modeling language for software and other systems.

The object diagram is a structural diagram as it shows a particular view of the structure of the modeled system. The presentation typically includes this expression specifications of classes and associations.

The object graph showing the current status, i.e., the assignment of attributes of an object or a class. As the number of attributes can be very large, it is possible to list only certain attributes which are sufficient for the purpose, we would like to illustrate.

The structure of the object graph is similar to the class diagram, except that the top box is not "just" the bold Classifiername or class name, but [ instance name]: [ Classifiername or type ], namely underlined. The instance name is optional and can be omitted from unnamed ( anonymous ) objects. No Classifiername known, this may be omitted. Just can - unlike in many programming languages ​​- several classifier (separated by commas ) can be specified at once.

Examples

The figure on the left shows an object diagram with expression specifications for two versions of the Person class and an object relationship between these characteristics.