title: Gitlab cross-reference project
body: <p>I am trying to find the best way to document my project in Gitlab. And I found two different alternatives:</p>
  
  <ul>
  <li>Markdown in the actual repository (<code>my-repo.git</code>)</li>
  <li>Wiki using markdown (<code>my-repo/wiki.git</code>)</li>
  </ul>
  
  <p>Note that the suffix <code>.git</code> indicates that these are two different git repositories.</p>
  
  <p>I like the approach to simply modify the Wiki using markdown from the webpage (for everyones simplicity), but I am missing how to link between them or any other project in Gitlab.</p>
  
  <p>In the <a href="https://docs.gitlab.com/ee/user/markdown.html#special-gitlab-references" rel="nofollow noreferrer">documentation</a> is provided some information to link (issues, commits, etc...) to other projects but not link files like the <code>README.md</code> and other documentation.</p>
  
  <p>Is there such functionality?</p>