title: Valid domain name registration for Unicode characters
body: <p>I'm trying to figure out what is valid for domain name registration, apparently some Unicode characters are translated weirdly while others do not at all.</p>
  
  <p>This address:</p>
  
  <pre><code>http://xn--ippleman-dmj.com/
  </code></pre>
  
  <p>Translates to:</p>
  
  <pre><code>http://Nippleman.com/
  </code></pre>
  
  <p>and</p>
  
  <pre><code>http://xn--ggle-0nda.com/
  </code></pre>
  
  <p>should translate to:</p>
  
  <pre><code>http://gοοgle.com/
  </code></pre>
  
  <p>but for some reason the browser prevents it.</p>
  
  <p>How is the format for these domains determined, and what is or isn't blocked by the browser?</p>
  
  <p><code>http://xn--ippleman-dmj.com/</code> is a valid URL, while <code>http://www.gοοgle.com</code> is not. Yet Chrome only replaces the Unicode on the second URL.  </p>