The Structural Things of UML

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UML may consists of three parts,namely,
1: Things
2: Relationships
3: Diagrams

Things is an important component parts of the UML ,Relationships gets the Things together and Diagrams is the mutual group of a lot of the Things related.

There are four Things:
1: Structural Things
2: Behavioral Things
3: Grouping Things
4: Annotational Things

These Things are the basic OO UML Model, They are  the most static part of the model and represent the conceptive or physical element.

Totally,there are seven strutural Things : the Class ,Interface,Collaboration,User Case ,Active Class,Component and Node .