Zoos and Animals

zoos_and_animals.viz

digraph SimplestDiagrams {
    Zoo1
    "Zoo1" -> "Cat" 
    "Zoo1" -> "Dog"
    
     Zoo2
    "Zoo2" -> "Cat"
    "Zoo2" -> "Crow"
    
     Zoo3
    "Zoo3" -> "Owl"
    "Zoo3" -> "Dog"
    Animals [
        shape=record
        label="{Animals|id\ntype=[cat, crow, dog, owl]\nzooId}"
    ]
    Zoo [
        shape=record
        label="{Zoo|id}"
    ]
    Zoo -> Animals [arrowhead=crow]
}