title: Ivy extra attributes xmlns
body: <ol>
  <li><p>What are the available URIs that could be specified for ivy extra attributes?</p>
  
  <p>The Ivy manual pages allow us to use the URI</p>
  
  <blockquote>
    <p>xmlns:e="http://ant.apache.org/ivy/extra"</p>
  </blockquote>
  
  <p>which would allow us the following free-form use of extra attributes. </p>
  
  <pre><code>&lt;ivy-module version="2.0"
    xmlns:e="http://ant.apache.org/ivy/extra"&gt;
  
    &lt;info
      organisation="mitt.wit"
      module="EtchASketch"
      revision="47-pct"
      e:reset="true"
      &gt;
  </code></pre>
  
  <p>Are there other URIs available for use? For example, could we do</p>
  
  <pre><code>&lt;ivy-module version="2.0"
    xmlns:e="http://ant.apache.org/ivy/extra"
    xmlns:m="http://ant.apache.org/ivy/maven"
    xmlns:ivy="antlibrg.apache.ivy.ant"
  
    &lt;info
      organisation="mitt.wit"
      module="EtchASketch"
      revision="47-pct"
      e:reset="true"
      ivy:home="${springfield.mittychusetts}"
      m:daven="sometimes"
      &gt;
  </code></pre>
  
  <p>What other URIs could I use?</p></li>
  <li><p>If there are other URIs available, where could I find their list of allowable attributes (from an XSD perhaps)? Like</p>
  
  <pre><code>m:classifier
  ivy:home
  </code></pre>
  
  <p>Or, perhaps, anything goes?</p></li>
  </ol>