chnology version and validating the document for this
    				condition. There are several validators that the developer can use;
    				validation reports generally mention this type of error. The document
    				type declaration is not strictly necessary for this type of evaluation,
    				but specifying the document type declaration makes it easier to use
    				a validator. </p>
   </section><section class="examples"><h2>Examples</h2>
      <section class="example">
         <h3>Example 1: HTML Vali