title: Are SVG parameters such as 'xmlns' and 'version' needed?
body: <p>In about half of the svg examples I see on the internet, the code is wrapped in plain simple <code>&lt;svg&gt;&lt;/svg&gt;</code> tags.</p>
  
  <p>In the other half, the svg tags have lots of complicated attributes like this: </p>
  
  <pre><code>&lt;svg 
    xmlns="http://www.w3.org/2000/svg" 
    version="1.1" 
    xmlns:xlink="http://www.w3.org/1999/xlink"&gt; 
  </code></pre>
  
  <p>My question is: is it ok to use the simple svg tags? I've tried playing around with the complicated ones, and everything works fine at my end if I don't include them.</p>