Meziantou.FrameworkErCardinality Enum
How many instances of an entity an instance of the other entity of a relationship relates to, drawn in crow's foot notation.
public enum ErCardinalityFields
| Name | Value | Description |
|---|---|---|
ExactlyOne | 0 | Exactly one: two bars (Mermaid ||). |
ZeroOrOne | 1 | Zero or one: a bar and a circle (Mermaid |o or o|). |
OneOrMore | 2 | One or more: a bar and a crow's foot (Mermaid }| or |{). |
ZeroOrMore | 3 | Zero or more: a circle and a crow's foot (Mermaid }o or o{). |
Parent | 4 | The parent of a master-detail relationship: a diamond (Mermaid u). |