title: How do I allow a non-absolute URI in xmllint?
body: <p>When I xmllint my XML file I get the following error: </p>
  
  <pre><code>my/path/myXmlFile.xml:2: namespace warning : xmlns: URI some.thing is not absolute
  </code></pre>
  
  <p>My app needs these kind of paths. I searched in the man pages of xmllint but could not find any arguments for my problem. How do I turn this validation error off?</p>