title: Angular 2 global component
body: <p>My structure is as follows : </p>
  
  <pre><code>App
      *component, module, template*
      Component 1
          *component, module, template*
          Component 11
              *component, module, template*
      Global Component
          *component, temaplte, BUT NO MODULE*
  </code></pre>
  
  <p>My App module contains the component 1 and component 11 modules. I declared the global component in the app module, so that I can use it in all my other components. I also exported it in app module. </p>
  
  <p>But when I use the selector in the component 11 template, the console says <code>not a known element</code>. </p>
  
  <p>I tried importing it in my other components but it says it's already imported, and that I should import it in a higher module. </p>
  
  <p>Could you tell me how to declare a component so that it can be used in child templates ? </p>