# Requirement Diagram

![Requirement Diagram](https://135672590-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-L9shwSMiocGHpSKcbss%2F-MIHbJnAoUFxGOI8ABjT%2F-MIHeNgCUaIyV4zgcToN%2FHSUVRequirements.png?alt=media\&token=2dfe322b-b6f2-4fc2-90f9-8534772cb9d0)

## Create Requirement Diagram

To create a Requirement Diagram:

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

## Requirement

To create a Requirement:

1. Select **Requirement** in **Toolbox**.
2. Drag on the diagram as the size you want.

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

* **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-Requirement** : Add a Requirement with a contained relationship.

To suppress Property Values, check (or uncheck) **Format | Suppress Property Values** in Menu Bar or Context Menu

## Copy

To create a Copy:

1. Select **Copy** in **Toolbox**.
2. Drag from an element (to be special) and drop on another element (to be general).

You can use **QuickEdit** for Relationship (See [Relationship](https://docs.staruml.io/master/working-with-uml-diagrams/class-diagram#relationship)).

## DeriveReqt

To create a DeriveReqt:

1. Select **DeriveReqt** in **Toolbox**.
2. Drag from an element (to be special) and drop on another element (to be general).

You can use **QuickEdit** for Relationship (See [Relationship](https://docs.staruml.io/master/working-with-uml-diagrams/class-diagram#relationship)).

## Verify

To create a Verify:

1. Select **Verify** in **Toolbox**.
2. Drag from an element (to be special) and drop on another element (to be general).

You can use **QuickEdit** for Relationship (See [Relationship](https://docs.staruml.io/master/working-with-uml-diagrams/class-diagram#relationship)).

## Satisfy

To create a Satisfy:

1. Select **Satisfy** in **Toolbox**.
2. Drag from an element (to be special) and drop on another element (to be general).

You can use **QuickEdit** for Relationship (See [Relationship](https://docs.staruml.io/master/working-with-uml-diagrams/class-diagram#relationship)).

## Refine

To create a Refine:

1. Select **Refine** in **Toolbox**.
2. Drag from an element (to be special) and drop on another element (to be general).

You can use **QuickEdit** for Relationship (See [Relationship](https://docs.staruml.io/master/working-with-uml-diagrams/class-diagram#relationship)).


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