Architecting and designing > UML 2.5 > Relationships > Extension
  
Extension
Drawn from a Stereotype to a Type.
To create an Extension, you can:
The Extension option supports drawing of a single line in a single action. For instructions on how to do so, see Line Wizard.
The Extension Node and Lines option supports drawing of two lines with a central node in a single action. For instructions on how to do so, see Line Wizard for lines with Central node symbols.
Draw an Extension node and then draw the lines to the stereotype and type separately.
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Relationships