title: With AMP HTML, is it legitimate to set the link canonical href attribute to pound (#)?
body: <p>Is it legitimate to set the canonical link to the pound symbol as shown below, or am I required to enter a physical page name?</p>
  
  <pre><code>&lt;link rel="canonical" href="#"&gt;
  </code></pre>
  
  <p>When testing this, the pound setting does not generate a validation error (ala #development=1).  In my scenario, the page using this layout file <strong>will not</strong> have an alternate "regular HTML" version.  The only version will be the AMP HTML version.</p>
  
  <p>For additional context, I'm experimenting with an MVC site that will use AMP HTML.  To keep my layout file simple, I'd prefer to use the pound symbol rather than extracting the child page name and applying that to the href attribute.  I know how to apply the URL to the partial view via code like so:</p>
  
  <pre><code>&lt;link rel="canonical" href="@HttpContext.Current.Request.Url.AbsoluteUri"&gt;
  </code></pre>
  
  <p>I'm just curious if it's legitimate AMP HTML to use the pound symbol instead. Thank you.</p>