title: UUID format: 8-4-4-4-12 - Why?
body: <p>Why are UUID's presented in the format "8-4-4-4-12" (digits)? I've had a look around for the reason but can't find the decision that calls for it.</p>
  
  <p>Example of UUID formatted as hex string:
  58D5E212-165B-4CA0-909B-C86B9CEE0111</p>