source: Base/HTML/XHTML.php

<?php

include_once(dirname(__FILE__).'/../XML.php');

class XHTMLDocument extends XMLDocument
{
  var $HeadTag;
  var $BodyTag;
  var $TitleTag;

  function __construct()
  {
    parent::__construct();
    $this->HeadTag = new XMLTag('head');
    $this->TitleTag = new XMLTag('title');
    $this->TitleTag->SubElements = '';
    $ContentType = new XMLTag('meta');
    $ContentType->Attributes = array('http-equiv' => 'content-type', 'content' => 'application/xhtml+xml; charset='.$this->Encoding);
    $this->HeadTag->SubElements = array($this->TitleTag, $ContentType);
    $this->BodyTag = new XMLTag('body');
  }

  function GetOutput()
  {
    $HTML = new XMLTag('html');
    $HTML->Attributes = array('xmlns' => 'http://www.w3.org/1999/xhtml',
      'xml:lang' => 'cs');
    $HTML->SubElements = array($this->HeadTag, $this->BodyTag);
    $DOCTYPE = new XMLTag('!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"');
    $DOCTYPE->EndSymbol = '';
    $this->Content = new XMLTag();
    $this->Content->SubElements = array($DOCTYPE, $HTML);
    return(parent::GetOutput());
  }
}

?>