# Block Definition Diagram

![Block Definition Diagram](/files/-MIHox224YM47HP-TB-y)

## Create Block Definition Diagram

To create a Block Definition Diagram:

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

## Block

To create a Block:

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

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

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

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

* **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 Part** : Add a part property.
* **Add Reference** : Add a reference property.
* **Add Value** : Add a value property (typed by ValueType).
* **Add Flow Property** : Add a flow property.
* **Add Constraint Property** : Add a constraint property.
* **Add Property** : Add a property.
* **Add Operation** : Add an operation.
* **Add Reception** : Add a reception.
* **Add Port** : Add a port.
* **Add Composited Block** : Add a composited block.

To suppress Constraint Properties, check (or uncheck) **Format | Suppress Constraints** in Menu Bar or Context Menu.

To suppress Part Properties, check (or uncheck) **Format | Suppress Parts** in Menu Bar or Context Menu.

To suppress Port Properties, check (or uncheck) **Format | Suppress Ports** in Menu Bar or Context Menu.

To suppress Reference Properties, check (or uncheck) **Format | Suppress References** in Menu Bar or Context Menu.

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

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

To suppress Flow Properties, check (or uncheck) **Format | Suppress Flow Properties** in Menu Bar or Context Menu.

## Value Type

To create a Value Type:

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

To create a Value Type (model element only) by Menu:

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

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

* **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 Attribute** : Add an attribute.
* **Add Operation** : Add an operation.
* **Add Reception** : Add a reception.

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

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

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

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

## Interface Block

To create a Interface Block:

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

To create a Interface Block (model element only) by Menu:

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

You can use the same **QuickEdit** for [Block](/working-with-sysml-diagrams/block-definition-diagram.md#block) by double-click or press `Enter` on the selected Interface Block.

## Constraint Block

To create a Constraint Block:

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

To create a Constraint Block (model element only) by Menu:

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

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

* **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 Parameter** : Add a constraint parameter.

To suppress Constraint Properties, check (or uncheck) **Format | Suppress Constraints** in Menu Bar or Context Menu.

To suppress Constraint Parameters, check (or uncheck) **Format | Suppress Properties** in Menu Bar or Context Menu.

## Port

To create a Port:

1. Select **Port** in **Toolbox**.
2. Click on the element (e.g. Class) where Port to be contained.

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

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

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

* **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.
* **Select Block** : Select a Block and assign it to type property.
* **Create Block** : Create a Block and assign it to type property.
* **Add Provided Interface** : Add a provided interface.
* **Add Required Interface** : Add a required interface.

## Object

See [Object](/working-with-uml-diagrams/object-diagram.md#object) in Object Diagram.

## Connector

To create an Connector:

1. Select **Connector** in **Toolbox**.
2. Drag from an element (e.g. Port) and drop on another element (e.g. Part).

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

* **Name Expression** : Edit name expression.
* **Visibility** : Change visibility property.
* **Add Note** : Add a linked note.
* **Add Constraint** : Add a constraint.
* **Create Item Flow** : Create an Item Flow. The both Ports (or Parts) should be typed to create an Item Flow.


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