title: Role of data-role attribute in html markup
body: <p>I am new to Kendo UI library. When going through the tutorial i found the following declaration</p>
  
  <pre><code>&lt;input id="JoiningDate" data-role="datepicker"/&gt;
  </code></pre>
  
  <p>could you please explain ,what is the role of data-role attribute?</p>