PocStore *-- "0..*" NonClsType : nonClsTypes
PocStore *-- "0..*" TestKeyName : keyName

class Order:::cssEntity {
    <<Entity · id>>
    id        : string
    customer? : string
    created   : DateTime
    items?    : OrderItem[]
}
Order o.. "0..1" Customer : customer
Order *-- "0..*" OrderItem : items

class Customer:::cssEntity {
    <<Entity · id>>
    id    : string
    name  : string
}

class Article:::cssEntity {
    <<Entity · id>>
    id        : string
    name      : string
    producer? : s