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Inheritance

A `<|--` inheritance relationship — a hollow-triangle "is-a" link between a subclass and its parent.

11 examples across every diagram type

Read more in the Mermaid docs →
Class diagram, Zombie Mermaid Animal + String name + eat(): void Dog + String breed + bark(): void Cat + bool isIndoor + meow(): void
Class diagramClass: Inheritance (<|--)
Class diagram, Zombie Mermaid A B C D E F G H I J K L inheritance composition aggregation association dependency realization
Class diagramClass: All 6 Relationship Types
Class diagram, Zombie Mermaid <<abstract>> Animal + String name + int age + eat(): void + sleep(): void Mammal + bool warmBlooded + nurse(): void Bird + bool canFly + layEggs(): void Dog + String breed + bark(): void Cat + bool isIndoor + purr(): void Parrot + String vocabulary + speak(): void
Class diagramClass: Full Hierarchy
Class diagram, Zombie Mermaid Animal + int age + eat() Duck
Class diagramClass: classDiagram-v2 Header
Class diagram, Zombie Mermaid Person Employee Order Customer places
Class diagramClass: Bidirectional Relationships
Class diagram, Zombie Mermaid Animal Class! + int age + String name + eat() Duck
Class diagramClass: Backtick Class Names
Class diagram, Zombie Mermaid Base Shape Circle Canvas Renderer Plugin Canvas Renderer draws
Class diagramClass: Mixed Newly Accepted Syntax
Class diagram, Zombie Mermaid Animal Dog Car Wheel Library Book Service Config Duck Swimmer Cart Item 1 0..* 1 4 holds 1 * reads 1 1..* * 1 1
Class diagramClass: Cardinalities on Every Relationship Kind
Class diagram, Zombie Mermaid Animal + String name + eat(): void Dog Cat Toy owns 1 *
Class diagramClass: Direction LR
Class diagram, Zombie Mermaid <<abstract>> Shape + area(): double Circle Square Drawable Shape all sides equal
Class diagramClass: Direction BT
Class diagram, Zombie Mermaid One Two A B C D
Class diagramClass: Two Namespaces with Cross Edges