title: Are there coding standards for XML files?
body: <p>I would like to know if there are any xml coding standards.</p>
  
  <pre><code>&lt;?xml version="1.0"?&gt;
  &lt;overlay id="tutorboy-toolbar-Overlay" xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"&gt;
      &lt;toolbox id="navigator-toolbox"&gt;
          &lt;toolbar id="tutorboy-toolbar-Toolbar" 
                    toolbarname="TutorBoy Toolbar" 
                    accesskey="T" 
                    class="chromeclass-toolbar" 
                    context="toolbar-context-menu" 
                    hidden="false" 
                    persist="hidden"&gt;
                &lt;toolbarbutton label="TutorBoy" 
                                  id="tutorboy-toolbar-button-home" 
                                  accesskey="d" 
                                  image="chrome://tutorboy-toolbar/skin/logo.png" 
                                  oncommand="loadURL('http://tutorboy.com');" 
                                  tooltiptext="Click here to go to the Tutorboy.com homepage." /&gt; 
  </code></pre>
  
  <p>is this way of arrangement allowed?</p>