ForeignKey (vertigo-datamodel 3.4.0 API)

@Retention(RUNTIME)
@Inherited
@Target({FIELD,METHOD})
public @interface ForeignKey

Author:: pchretien

- Required Element Summary
  
  Required Elements
  Modifier and Type Required Element Description
  
  String fkDefinition
  Foreign DtDefinition
  
  String label
  Field's label.
  
  String smartType
  SmartType.
- Optional Element Summary
  
  Optional Elements
  Modifier and Type Optional Element Description
  
  io.vertigo.core.lang.Cardinality cardinality
  Field's cardinality

- Element Detail
  - smartType
```
String smartType
```
    SmartType.
- - label
```
String label
```
    Field's label.
- - fkDefinition
```
String fkDefinition
```
    Foreign DtDefinition
- - cardinality
```
io.vertigo.core.lang.Cardinality cardinality
```
    Field's cardinality
    
    Default:
    
    io.vertigo.core.lang.Cardinality.OPTIONAL_OR_NULLABLE