```
@Target(ANNOTATION_TYPE)
@Retention(RUNTIME)
@Documented
public @interface Qualifier
```
Identifies qualifier annotations. Anyone can define a new qualifier. A qualifier annotation:
- is annotated with @Qualifier, @Retention(RUNTIME), and typically @Documented.
- can have attributes.
- may be part of the public API, much like the dependency type, but unlike implementation types which needn't be part of the public API.
- may have restricted usage if annotated with @Target. While this specification covers applying qualifiers to fields and parameters only, some injector configurations might use qualifier annotations in other places (on methods or classes for example).
For example:
```
   @java.lang.annotation.Documented
   @java.lang.annotation.Retention(RUNTIME)
   @jakarta.inject.Qualifier
   public @interface Leather {
     Color color() default Color.TAN;
     public enum Color { RED, BLACK, TAN }
   }
```
See Also:

@Named

Annotation Type Qualifier