title: Z attribute in field:input Spring Tag
body: <p>I'm building an app using SpringRoo, I've generated the repositories, the services and I've done the scaffold of my model classes. </p>
  
  <p>Now I want to customize my User Interface (e.g. create.jspx form), and I cannot understand some behavior in this part:</p>
  
  <pre><code>&lt;field:textarea field="cocFile" id="c_com_project_name_domain_ObjectModel_file" z="Wo9RZ7vKscJS74aMwIMY1mqfCsU="/&gt;
  </code></pre>
  
  <p>I cannot see the purpose of the <code>z</code> attribute, and I cannot either integrate my own html template in the generated vues. so what <code>z</code> stands for in this case, and is it possible to override all generated views by springRoo with custom jsp views.</p>