# Package Diagram

![Package Diagram](https://135672590-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-L9shwSMiocGHpSKcbss%2F-MICY96Py27LH3Wh1k_P%2F-MIC_13ZHBO7BBMUEZs2%2FMulti-Layered%20Web%20Architecture.png?alt=media\&token=4eda1347-3846-4435-a74f-1d81b2d5b44f)

## Create Package Diagram

To create a Package Diagram:

1. Select first an element where a new Package Diagram to be contained as a child.
2. Select **Model | Add Diagram | Package Diagram** in Menu Bar or select **Add Diagram | Package Diagram** in Context Menu.

> **See also**
>
> [UML Package Diagram](http://www.uml-diagrams.org/package-diagrams-overview.html) - For more information about UML Package Diagram.

## Package

To create a Package on a diagram:

1. Select **Package** in **Toolbox**.
2. Drag on the diagram as the size of Package.

To create a Package (model element only) by Menu:

1. Select an Element where a new Package to be contained.
2. Select **Model | Add | Package** in Menu Bar or **Add | Package** in Context Menu.

You can use **QuickEdit** for Package by double-click or press `Enter` on a selected Package.

* **Name Expression** : Edit name expression.

  *Syntax of Name Expression*

  ```
  expression ::= [ '<<' stereotype `>>` ] [ visibility ] name
  stereotype ::= (identifier)
  visibility ::= '+' | '#' | '-' | '~'
  name ::= (identifier)
  ```
* **Visibility** : Change visibility property.
* **Add Note** : Add a linked note.
* **Add Constraint** : Add a constraint.
* **Add Sub-Package** : Add a sub-package.
* **Add Dependant Package** : Add a dependant package.
* **Add Depending Package** : Add a depending package.

## Model

To create a Model on a diagram:

1. Select **Model** in **Toolbox**.
2. Drag on the diagram as the size of Model.

To create a Model (model element only) by Menu:

1. Select an Element where a new Model to be contained.
2. Select **Model | Add | Model** in Menu Bar or **Add | Model** in Context Menu.

You can use **QuickEdit** for Model Element (See [Model Element](https://docs.staruml.io/master/class-diagram#model-element)).

## Subsystem

To create a Subsystem on a diagram:

1. Select **Subsystem** in **Toolbox**.
2. Drag on the diagram as the size of Subsystem.

To create a Subsystem (model element only) by Menu:

1. Select an Element where a new Subsystem to be contained.
2. Select **Model | Add | Subsystem** in Menu Bar or **Add | Subsystem** in Context Menu.

You can use **QuickEdit** for Subsystem by double-click or press `Enter` on a selected Subsystem.

* **Name Expression** : Edit name expression.

  *Syntax of Name Expression*

  ```
  expression ::= [ '<<' stereotype `>>` ] [ visibility ] name
  stereotype ::= (identifier)
  visibility ::= '+' | '#' | '-' | '~'
  name ::= (identifier)
  ```
* **Visibility** : Change visibility property.
* **Add Note** : Add a linked note.
* **Add Constraint** : Add a constraint.
* **Add Provided Interface** : Add a provided interface.
* **Add Required Interface** : Add a required interface.

## Containment

To make an Containment relation:

1. Select **Containment** in **Toolbox**.
2. Drag from an element (to be contained) and drop on a container element.

> **Note**
>
> There is no Containment model element. The Containment view element only show the containment relationship between two elements. (Contained elements are shown as children in **Model Explorer**)