
p.location-badge.
  exported from <a href='../core'>angular2/core</a>
  defined in <a href="https://github.com/angular/angular/tree/2.0.0-alpha.37/modules/angular2/src/core/di/metadata.ts#L33-L64">angular2/src/core/di/metadata.ts (line 33)</a>

:markdown
  `DependencyMetadata` is used by the framework to extend DI.
  
  Only metadata implementing `DependencyMetadata` are added to the list of dependency
  properties.
  
  For example:
  
  ```
  class Exclude extends DependencyMetadata {}
  class NotDependencyProperty {}
  
  class AComponent {
    constructor(@Exclude @NotDependencyProperty aService:AService) {}
  }
  ```
  
  will create the following dependency:
  
  ```
  new Dependency(Key.get(AService), [new Exclude()])
  ```
  
  The framework can use `new Exclude()` to handle the `aService` dependency
  in a specific way.
  
  

.l-main-section
  h2 Annotations
.l-main-section
  h2 Members
  .l-sub-section
    h3#token token

    
    :markdown




