Entity Relationship

An entity–relationship model (or ER model) describes interrelated things of interest in a specific domain of knowledge.

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Syntax

Theme:

default

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CUSTOMER ||--o{ ORDER : places

CUSTOMER {

string name

string custNumber

string sector

}

ORDER ||--|{ LINE-ITEM : contains

ORDER {

int orderNumber

string deliveryAddress

}

LINE-ITEM {

string productCode

int quantity

float pricePerUnit

}

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CAR ||--o{ NAMED-DRIVER : allows

CAR {

string registrationNumber

string make

string model

}

PERSON ||--o{ NAMED-DRIVER : is

PERSON {

string firstName

string lastName

int age

}

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