Horde_Xml_Wbxml::getDPIString PHP Method

    public static function getDPIString($i)
    {
        /**
         * ADD CHAPTER
         */
        $DPIString = array(2 => Horde_Xml_Wbxml_Dtd::WML_1_0, 3 => Horde_Xml_Wbxml_Dtd::WTA_1_0, 4 => Horde_Xml_Wbxml_Dtd::WML_1_1, 5 => Horde_Xml_Wbxml_Dtd::SI_1_1, 6 => Horde_Xml_Wbxml_Dtd::SL_1_0, 7 => Horde_Xml_Wbxml_Dtd::CO_1_0, 8 => Horde_Xml_Wbxml_Dtd::CHANNEL_1_1, 9 => Horde_Xml_Wbxml_Dtd::WML_1_2, 10 => Horde_Xml_Wbxml_Dtd::WML_1_3, 11 => Horde_Xml_Wbxml_Dtd::PROV_1_0, 12 => Horde_Xml_Wbxml_Dtd::WTA_WML_1_2, 13 => Horde_Xml_Wbxml_Dtd::CHANNEL_1_2, 4049 => Horde_Xml_Wbxml_Dtd::SYNCML_1_0, 4050 => Horde_Xml_Wbxml_Dtd::DEVINF_1_0, 4051 => Horde_Xml_Wbxml_Dtd::SYNCML_1_1, 4052 => Horde_Xml_Wbxml_Dtd::DEVINF_1_1, 4609 => Horde_Xml_Wbxml_Dtd::SYNCML_1_2, 4611 => Horde_Xml_Wbxml_Dtd::DEVINF_1_2);
        return isset($DPIString[$i]) ? $DPIString[$i] : null;
    }

 public function getDocumentPublicIdentifierImpl($dpiType, $dpiNumber)
 {
     if ($dpiType == 1) {
         return Horde_Xml_Wbxml::getDPIString($dpiNumber);
     } else {
         return $this->getStringTableEntry($dpiNumber);
     }
 }