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Long Term Support Release

  • Bug fixes for general core bugs in 3.9.x will end* 10 May 2021 (12 months).
  • Bug fixes for security issues in 3.9.x will end* 8 May 2023 (36 months).
  • PHP version: minimum PHP 7.2.0 Note: minimum PHP version has increased since Moodle 3.8. PHP 7.3.x and 7.4.x are supported too.
<?php
/**
 * SimplePie
 *
 * A PHP-Based RSS and Atom Feed Framework.
 * Takes the hard work out of managing a complete RSS/Atom solution.
 *
< * Copyright (c) 2004-2016, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors
> * Copyright (c) 2004-2016, Ryan Parman, Sam Sneddon, Ryan McCue, and contributors
* All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, are * permitted provided that the following conditions are met: * * * Redistributions of source code must retain the above copyright notice, this list of * conditions and the following disclaimer. * * * Redistributions in binary form must reproduce the above copyright notice, this list * of conditions and the following disclaimer in the documentation and/or other materials * provided with the distribution. * * * Neither the name of the SimplePie Team nor the names of its contributors may be used * to endorse or promote products derived from this software without specific prior * written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS * AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * * @package SimplePie
< * @copyright 2004-2016 Ryan Parman, Geoffrey Sneddon, Ryan McCue
> * @copyright 2004-2016 Ryan Parman, Sam Sneddon, Ryan McCue
* @author Ryan Parman
< * @author Geoffrey Sneddon
> * @author Sam Sneddon
* @author Ryan McCue * @link http://simplepie.org/ SimplePie * @license http://www.opensource.org/licenses/bsd-license.php BSD License */ /** * Parses XML into something sane * * * This class can be overloaded with {@see SimplePie::set_parser_class()} * * @package SimplePie * @subpackage Parsing */ class SimplePie_Parser { var $error_code; var $error_string; var $current_line; var $current_column; var $current_byte; var $separator = ' '; var $namespace = array(''); var $element = array(''); var $xml_base = array(''); var $xml_base_explicit = array(false); var $xml_lang = array(''); var $data = array(); var $datas = array(array()); var $current_xhtml_construct = -1; var $encoding; protected $registry; public function set_registry(SimplePie_Registry $registry) { $this->registry = $registry; } public function parse(&$data, $encoding, $url = '') { if (class_exists('DOMXpath') && function_exists('Mf2\parse')) { $doc = new DOMDocument(); @$doc->loadHTML($data); $xpath = new DOMXpath($doc); // Check for both h-feed and h-entry, as both a feed with no entries // and a list of entries without an h-feed wrapper are both valid. $query = '//*[contains(concat(" ", @class, " "), " h-feed ") or '. 'contains(concat(" ", @class, " "), " h-entry ")]'; $result = $xpath->query($query); if ($result->length !== 0) { return $this->parse_microformats($data, $url); } } // Use UTF-8 if we get passed US-ASCII, as every US-ASCII character is a UTF-8 character if (strtoupper($encoding) === 'US-ASCII') { $this->encoding = 'UTF-8'; } else { $this->encoding = $encoding; } // Strip BOM: // UTF-32 Big Endian BOM if (substr($data, 0, 4) === "\x00\x00\xFE\xFF") { $data = substr($data, 4); } // UTF-32 Little Endian BOM elseif (substr($data, 0, 4) === "\xFF\xFE\x00\x00") { $data = substr($data, 4); } // UTF-16 Big Endian BOM elseif (substr($data, 0, 2) === "\xFE\xFF") { $data = substr($data, 2); } // UTF-16 Little Endian BOM elseif (substr($data, 0, 2) === "\xFF\xFE") { $data = substr($data, 2); } // UTF-8 BOM elseif (substr($data, 0, 3) === "\xEF\xBB\xBF") { $data = substr($data, 3); } if (substr($data, 0, 5) === '<?xml' && strspn(substr($data, 5, 1), "\x09\x0A\x0D\x20") && ($pos = strpos($data, '?>')) !== false) { $declaration = $this->registry->create('XML_Declaration_Parser', array(substr($data, 5, $pos - 5))); if ($declaration->parse()) { $data = substr($data, $pos + 2); $data = '<?xml version="' . $declaration->version . '" encoding="' . $encoding . '" standalone="' . (($declaration->standalone) ? 'yes' : 'no') . '"?>' ."\n". $this->declare_html_entities() . $data; } else { $this->error_string = 'SimplePie bug! Please report this!'; return false; } } $return = true; static $xml_is_sane = null; if ($xml_is_sane === null) { $parser_check = xml_parser_create(); xml_parse_into_struct($parser_check, '<foo>&amp;</foo>', $values); xml_parser_free($parser_check); $xml_is_sane = isset($values[0]['value']); } // Create the parser if ($xml_is_sane) { $xml = xml_parser_create_ns($this->encoding, $this->separator); xml_parser_set_option($xml, XML_OPTION_SKIP_WHITE, 1); xml_parser_set_option($xml, XML_OPTION_CASE_FOLDING, 0); xml_set_object($xml, $this); xml_set_character_data_handler($xml, 'cdata'); xml_set_element_handler($xml, 'tag_open', 'tag_close'); // Parse! if (!xml_parse($xml, $data, true)) { $this->error_code = xml_get_error_code($xml); $this->error_string = xml_error_string($this->error_code); $return = false; } $this->current_line = xml_get_current_line_number($xml); $this->current_column = xml_get_current_column_number($xml); $this->current_byte = xml_get_current_byte_index($xml); xml_parser_free($xml); return $return; } libxml_clear_errors(); $xml = new XMLReader(); $xml->xml($data); while (@$xml->read()) { switch ($xml->nodeType) { case constant('XMLReader::END_ELEMENT'): if ($xml->namespaceURI !== '') { $tagName = $xml->namespaceURI . $this->separator . $xml->localName; } else { $tagName = $xml->localName; } $this->tag_close(null, $tagName); break; case constant('XMLReader::ELEMENT'): $empty = $xml->isEmptyElement; if ($xml->namespaceURI !== '') { $tagName = $xml->namespaceURI . $this->separator . $xml->localName; } else { $tagName = $xml->localName; } $attributes = array(); while ($xml->moveToNextAttribute()) { if ($xml->namespaceURI !== '') { $attrName = $xml->namespaceURI . $this->separator . $xml->localName; } else { $attrName = $xml->localName; } $attributes[$attrName] = $xml->value; } $this->tag_open(null, $tagName, $attributes); if ($empty) { $this->tag_close(null, $tagName); } break; case constant('XMLReader::TEXT'): case constant('XMLReader::CDATA'): $this->cdata(null, $xml->value); break; } } if ($error = libxml_get_last_error()) { $this->error_code = $error->code; $this->error_string = $error->message; $this->current_line = $error->line; $this->current_column = $error->column; return false; } return true; } public function get_error_code() { return $this->error_code; } public function get_error_string() { return $this->error_string; } public function get_current_line() { return $this->current_line; } public function get_current_column() { return $this->current_column; } public function get_current_byte() { return $this->current_byte; } public function get_data() { return $this->data; } public function tag_open($parser, $tag, $attributes) { list($this->namespace[], $this->element[]) = $this->split_ns($tag); $attribs = array(); foreach ($attributes as $name => $value) { list($attrib_namespace, $attribute) = $this->split_ns($name); $attribs[$attrib_namespace][$attribute] = $value; } if (isset($attribs[SIMPLEPIE_NAMESPACE_XML]['base'])) { $base = $this->registry->call('Misc', 'absolutize_url', array($attribs[SIMPLEPIE_NAMESPACE_XML]['base'], end($this->xml_base))); if ($base !== false) { $this->xml_base[] = $base; $this->xml_base_explicit[] = true; } } else { $this->xml_base[] = end($this->xml_base); $this->xml_base_explicit[] = end($this->xml_base_explicit); } if (isset($attribs[SIMPLEPIE_NAMESPACE_XML]['lang'])) { $this->xml_lang[] = $attribs[SIMPLEPIE_NAMESPACE_XML]['lang']; } else { $this->xml_lang[] = end($this->xml_lang); } if ($this->current_xhtml_construct >= 0) { $this->current_xhtml_construct++; if (end($this->namespace) === SIMPLEPIE_NAMESPACE_XHTML) { $this->data['data'] .= '<' . end($this->element); if (isset($attribs[''])) { foreach ($attribs[''] as $name => $value) { $this->data['data'] .= ' ' . $name . '="' . htmlspecialchars($value, ENT_COMPAT, $this->encoding) . '"'; } } $this->data['data'] .= '>'; } } else { $this->datas[] =& $this->data; $this->data =& $this->data['child'][end($this->namespace)][end($this->element)][]; $this->data = array('data' => '', 'attribs' => $attribs, 'xml_base' => end($this->xml_base), 'xml_base_explicit' => end($this->xml_base_explicit), 'xml_lang' => end($this->xml_lang)); if ((end($this->namespace) === SIMPLEPIE_NAMESPACE_ATOM_03 && in_array(end($this->element), array('title', 'tagline', 'copyright', 'info', 'summary', 'content')) && isset($attribs['']['mode']) && $attribs['']['mode'] === 'xml') || (end($this->namespace) === SIMPLEPIE_NAMESPACE_ATOM_10 && in_array(end($this->element), array('rights', 'subtitle', 'summary', 'info', 'title', 'content')) && isset($attribs['']['type']) && $attribs['']['type'] === 'xhtml') || (end($this->namespace) === SIMPLEPIE_NAMESPACE_RSS_20 && in_array(end($this->element), array('title'))) || (end($this->namespace) === SIMPLEPIE_NAMESPACE_RSS_090 && in_array(end($this->element), array('title'))) || (end($this->namespace) === SIMPLEPIE_NAMESPACE_RSS_10 && in_array(end($this->element), array('title')))) { $this->current_xhtml_construct = 0; } } } public function cdata($parser, $cdata) { if ($this->current_xhtml_construct >= 0) { $this->data['data'] .= htmlspecialchars($cdata, ENT_QUOTES, $this->encoding); } else { $this->data['data'] .= $cdata; } } public function tag_close($parser, $tag) { if ($this->current_xhtml_construct >= 0) { $this->current_xhtml_construct--; if (end($this->namespace) === SIMPLEPIE_NAMESPACE_XHTML && !in_array(end($this->element), array('area', 'base', 'basefont', 'br', 'col', 'frame', 'hr', 'img', 'input', 'isindex', 'link', 'meta', 'param'))) { $this->data['data'] .= '</' . end($this->element) . '>'; } } if ($this->current_xhtml_construct === -1) { $this->data =& $this->datas[count($this->datas) - 1]; array_pop($this->datas); } array_pop($this->element); array_pop($this->namespace); array_pop($this->xml_base); array_pop($this->xml_base_explicit); array_pop($this->xml_lang); } public function split_ns($string) { static $cache = array(); if (!isset($cache[$string])) { if ($pos = strpos($string, $this->separator)) { static $separator_length; if (!$separator_length) { $separator_length = strlen($this->separator); } $namespace = substr($string, 0, $pos); $local_name = substr($string, $pos + $separator_length); if (strtolower($namespace) === SIMPLEPIE_NAMESPACE_ITUNES) { $namespace = SIMPLEPIE_NAMESPACE_ITUNES; } // Normalize the Media RSS namespaces if ($namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG || $namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG2 || $namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG3 || $namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG4 || $namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG5 ) { $namespace = SIMPLEPIE_NAMESPACE_MEDIARSS; } $cache[$string] = array($namespace, $local_name); } else { $cache[$string] = array('', $string); } } return $cache[$string]; } private function parse_hcard($data, $category = false) { $name = ''; $link = ''; // Check if h-card is set and pass that information on in the link. if (isset($data['type']) && in_array('h-card', $data['type'])) { if (isset($data['properties']['name'][0])) { $name = $data['properties']['name'][0]; } if (isset($data['properties']['url'][0])) { $link = $data['properties']['url'][0]; if ($name === '') { $name = $link; } else { // can't have commas in categories. $name = str_replace(',', '', $name); } $person_tag = $category ? '<span class="person-tag"></span>' : ''; return '<a class="h-card" href="'.$link.'">'.$person_tag.$name.'</a>'; } } return isset($data['value']) ? $data['value'] : ''; } private function parse_microformats(&$data, $url) { $feed_title = ''; $feed_author = NULL; $author_cache = array(); $items = array(); $entries = array(); $mf = Mf2\parse($data, $url); // First look for an h-feed. $h_feed = array(); foreach ($mf['items'] as $mf_item) { if (in_array('h-feed', $mf_item['type'])) { $h_feed = $mf_item; break; } // Also look for h-feed or h-entry in the children of each top level item. if (!isset($mf_item['children'][0]['type'])) continue; if (in_array('h-feed', $mf_item['children'][0]['type'])) { $h_feed = $mf_item['children'][0]; // In this case the parent of the h-feed may be an h-card, so use it as // the feed_author. if (in_array('h-card', $mf_item['type'])) $feed_author = $mf_item; break; } else if (in_array('h-entry', $mf_item['children'][0]['type'])) { $entries = $mf_item['children']; // In this case the parent of the h-entry list may be an h-card, so use // it as the feed_author. if (in_array('h-card', $mf_item['type'])) $feed_author = $mf_item; break; } } if (isset($h_feed['children'])) { $entries = $h_feed['children']; // Also set the feed title and store author from the h-feed if available. if (isset($mf['items'][0]['properties']['name'][0])) { $feed_title = $mf['items'][0]['properties']['name'][0]; } if (isset($mf['items'][0]['properties']['author'][0])) { $feed_author = $mf['items'][0]['properties']['author'][0]; } } else if (count($entries) === 0) { $entries = $mf['items']; } for ($i = 0; $i < count($entries); $i++) { $entry = $entries[$i]; if (in_array('h-entry', $entry['type'])) { $item = array(); $title = ''; $description = ''; if (isset($entry['properties']['url'][0])) { $link = $entry['properties']['url'][0]; if (isset($link['value'])) $link = $link['value']; $item['link'] = array(array('data' => $link)); } if (isset($entry['properties']['uid'][0])) { $guid = $entry['properties']['uid'][0]; if (isset($guid['value'])) $guid = $guid['value']; $item['guid'] = array(array('data' => $guid)); } if (isset($entry['properties']['name'][0])) { $title = $entry['properties']['name'][0]; if (isset($title['value'])) $title = $title['value']; $item['title'] = array(array('data' => $title)); } if (isset($entry['properties']['author'][0]) || isset($feed_author)) { // author is a special case, it can be plain text or an h-card array. // If it's plain text it can also be a url that should be followed to // get the actual h-card. $author = isset($entry['properties']['author'][0]) ? $entry['properties']['author'][0] : $feed_author; if (!is_string($author)) { $author = $this->parse_hcard($author); } else if (strpos($author, 'http') === 0) { if (isset($author_cache[$author])) { $author = $author_cache[$author]; } else { $mf = Mf2\fetch($author); foreach ($mf['items'] as $hcard) { // Only interested in an h-card by itself in this case. if (!in_array('h-card', $hcard['type'])) { continue; } // It must have a url property matching what we fetched. if (!isset($hcard['properties']['url']) || !(in_array($author, $hcard['properties']['url']))) { continue; } // Save parse_hcard the trouble of finding the correct url. $hcard['properties']['url'][0] = $author; // Cache this h-card for the next h-entry to check. $author_cache[$author] = $this->parse_hcard($hcard); $author = $author_cache[$author]; break; } } } $item['author'] = array(array('data' => $author)); } if (isset($entry['properties']['photo'][0])) { // If a photo is also in content, don't need to add it again here. $content = ''; if (isset($entry['properties']['content'][0]['html'])) { $content = $entry['properties']['content'][0]['html']; } $photo_list = array(); for ($j = 0; $j < count($entry['properties']['photo']); $j++) { $photo = $entry['properties']['photo'][$j]; if (!empty($photo) && strpos($content, $photo) === false) { $photo_list[] = $photo; } } // When there's more than one photo show the first and use a lightbox. // Need a permanent, unique name for the image set, but don't have // anything unique except for the content itself, so use that. $count = count($photo_list); if ($count > 1) { $image_set_id = preg_replace('/[[:^alnum:]]/', '', $photo_list[0]); $description = '<p>'; for ($j = 0; $j < $count; $j++) { $hidden = $j === 0 ? '' : 'class="hidden" '; $description .= '<a href="'.$photo_list[$j].'" '.$hidden. 'data-lightbox="image-set-'.$image_set_id.'">'. '<img src="'.$photo_list[$j].'"></a>'; } $description .= '<br><b>'.$count.' photos</b></p>'; } else if ($count == 1) { $description = '<p><img src="'.$photo_list[0].'"></p>'; } } if (isset($entry['properties']['content'][0]['html'])) { // e-content['value'] is the same as p-name when they are on the same // element. Use this to replace title with a strip_tags version so // that alt text from images is not included in the title. if ($entry['properties']['content'][0]['value'] === $title) { $title = strip_tags($entry['properties']['content'][0]['html']); $item['title'] = array(array('data' => $title)); } $description .= $entry['properties']['content'][0]['html']; if (isset($entry['properties']['in-reply-to'][0])) { $in_reply_to = ''; if (is_string($entry['properties']['in-reply-to'][0])) { $in_reply_to = $entry['properties']['in-reply-to'][0]; } else if (isset($entry['properties']['in-reply-to'][0]['value'])) { $in_reply_to = $entry['properties']['in-reply-to'][0]['value']; } if ($in_reply_to !== '') { $description .= '<p><span class="in-reply-to"></span> '. '<a href="'.$in_reply_to.'">'.$in_reply_to.'</a><p>'; } } $item['description'] = array(array('data' => $description)); } if (isset($entry['properties']['category'])) { $category_csv = ''; // Categories can also contain h-cards. foreach ($entry['properties']['category'] as $category) { if ($category_csv !== '') $category_csv .= ', '; if (is_string($category)) { // Can't have commas in categories. $category_csv .= str_replace(',', '', $category); } else { $category_csv .= $this->parse_hcard($category, true); } } $item['category'] = array(array('data' => $category_csv)); } if (isset($entry['properties']['published'][0])) { $timestamp = strtotime($entry['properties']['published'][0]); $pub_date = date('F j Y g:ia', $timestamp).' GMT'; $item['pubDate'] = array(array('data' => $pub_date)); } // The title and description are set to the empty string to represent // a deleted item (which also makes it an invalid rss item). if (isset($entry['properties']['deleted'][0])) { $item['title'] = array(array('data' => '')); $item['description'] = array(array('data' => '')); } $items[] = array('child' => array('' => $item)); } } // Mimic RSS data format when storing microformats. $link = array(array('data' => $url)); $image = ''; if (!is_string($feed_author) && isset($feed_author['properties']['photo'][0])) { $image = array(array('child' => array('' => array('url' => array(array('data' => $feed_author['properties']['photo'][0])))))); } // Use the name given for the h-feed, or get the title from the html. if ($feed_title !== '') { $feed_title = array(array('data' => htmlspecialchars($feed_title))); } else if ($position = strpos($data, '<title>')) { $start = $position < 200 ? 0 : $position - 200; $check = substr($data, $start, 400); $matches = array(); if (preg_match('/<title>(.+)<\/title>/', $check, $matches)) { $feed_title = array(array('data' => htmlspecialchars($matches[1]))); } } $channel = array('channel' => array(array('child' => array('' => array('link' => $link, 'image' => $image, 'title' => $feed_title, 'item' => $items))))); $rss = array(array('attribs' => array('' => array('version' => '2.0')), 'child' => array('' => $channel))); $this->data = array('child' => array('' => array('rss' => $rss))); return true; } private function declare_html_entities() { // This is required because the RSS specification says that entity-encoded // html is allowed, but the xml specification says they must be declared. return '<!DOCTYPE html [ <!ENTITY nbsp "&#x00A0;"> <!ENTITY iexcl "&#x00A1;"> <!ENTITY cent "&#x00A2;"> <!ENTITY pound "&#x00A3;"> <!ENTITY curren "&#x00A4;"> <!ENTITY yen "&#x00A5;"> <!ENTITY brvbar "&#x00A6;"> <!ENTITY sect "&#x00A7;"> <!ENTITY uml "&#x00A8;"> <!ENTITY copy "&#x00A9;"> <!ENTITY ordf "&#x00AA;"> <!ENTITY laquo "&#x00AB;"> <!ENTITY not "&#x00AC;"> <!ENTITY shy "&#x00AD;"> <!ENTITY reg "&#x00AE;"> <!ENTITY macr "&#x00AF;"> <!ENTITY deg "&#x00B0;"> <!ENTITY plusmn "&#x00B1;"> <!ENTITY sup2 "&#x00B2;"> <!ENTITY sup3 "&#x00B3;"> <!ENTITY acute "&#x00B4;"> <!ENTITY micro "&#x00B5;"> <!ENTITY para "&#x00B6;"> <!ENTITY middot "&#x00B7;"> <!ENTITY cedil "&#x00B8;"> <!ENTITY sup1 "&#x00B9;"> <!ENTITY ordm "&#x00BA;"> <!ENTITY raquo "&#x00BB;"> <!ENTITY frac14 "&#x00BC;"> <!ENTITY frac12 "&#x00BD;"> <!ENTITY frac34 "&#x00BE;"> <!ENTITY iquest "&#x00BF;"> <!ENTITY Agrave "&#x00C0;"> <!ENTITY Aacute "&#x00C1;"> <!ENTITY Acirc "&#x00C2;"> <!ENTITY Atilde "&#x00C3;"> <!ENTITY Auml "&#x00C4;"> <!ENTITY Aring "&#x00C5;"> <!ENTITY AElig "&#x00C6;"> <!ENTITY Ccedil "&#x00C7;"> <!ENTITY Egrave "&#x00C8;"> <!ENTITY Eacute "&#x00C9;"> <!ENTITY Ecirc "&#x00CA;"> <!ENTITY Euml "&#x00CB;"> <!ENTITY Igrave "&#x00CC;"> <!ENTITY Iacute "&#x00CD;"> <!ENTITY Icirc "&#x00CE;"> <!ENTITY Iuml "&#x00CF;"> <!ENTITY ETH "&#x00D0;"> <!ENTITY Ntilde "&#x00D1;"> <!ENTITY Ograve "&#x00D2;"> <!ENTITY Oacute "&#x00D3;"> <!ENTITY Ocirc "&#x00D4;"> <!ENTITY Otilde "&#x00D5;"> <!ENTITY Ouml "&#x00D6;"> <!ENTITY times "&#x00D7;"> <!ENTITY Oslash "&#x00D8;"> <!ENTITY Ugrave "&#x00D9;"> <!ENTITY Uacute "&#x00DA;"> <!ENTITY Ucirc "&#x00DB;"> <!ENTITY Uuml "&#x00DC;"> <!ENTITY Yacute "&#x00DD;"> <!ENTITY THORN "&#x00DE;"> <!ENTITY szlig "&#x00DF;"> <!ENTITY agrave "&#x00E0;"> <!ENTITY aacute "&#x00E1;"> <!ENTITY acirc "&#x00E2;"> <!ENTITY atilde "&#x00E3;"> <!ENTITY auml "&#x00E4;"> <!ENTITY aring "&#x00E5;"> <!ENTITY aelig "&#x00E6;"> <!ENTITY ccedil "&#x00E7;"> <!ENTITY egrave "&#x00E8;"> <!ENTITY eacute "&#x00E9;"> <!ENTITY ecirc "&#x00EA;"> <!ENTITY euml "&#x00EB;"> <!ENTITY igrave "&#x00EC;"> <!ENTITY iacute "&#x00ED;"> <!ENTITY icirc "&#x00EE;"> <!ENTITY iuml "&#x00EF;"> <!ENTITY eth "&#x00F0;"> <!ENTITY ntilde "&#x00F1;"> <!ENTITY ograve "&#x00F2;"> <!ENTITY oacute "&#x00F3;"> <!ENTITY ocirc "&#x00F4;"> <!ENTITY otilde "&#x00F5;"> <!ENTITY ouml "&#x00F6;"> <!ENTITY divide "&#x00F7;"> <!ENTITY oslash "&#x00F8;"> <!ENTITY ugrave "&#x00F9;"> <!ENTITY uacute "&#x00FA;"> <!ENTITY ucirc "&#x00FB;"> <!ENTITY uuml "&#x00FC;"> <!ENTITY yacute "&#x00FD;"> <!ENTITY thorn "&#x00FE;"> <!ENTITY yuml "&#x00FF;"> <!ENTITY OElig "&#x0152;"> <!ENTITY oelig "&#x0153;"> <!ENTITY Scaron "&#x0160;"> <!ENTITY scaron "&#x0161;"> <!ENTITY Yuml "&#x0178;"> <!ENTITY fnof "&#x0192;"> <!ENTITY circ "&#x02C6;"> <!ENTITY tilde "&#x02DC;"> <!ENTITY Alpha "&#x0391;"> <!ENTITY Beta "&#x0392;"> <!ENTITY Gamma "&#x0393;"> <!ENTITY Epsilon "&#x0395;"> <!ENTITY Zeta "&#x0396;"> <!ENTITY Eta "&#x0397;"> <!ENTITY Theta "&#x0398;"> <!ENTITY Iota "&#x0399;"> <!ENTITY Kappa "&#x039A;"> <!ENTITY Lambda "&#x039B;"> <!ENTITY Mu "&#x039C;"> <!ENTITY Nu "&#x039D;"> <!ENTITY Xi "&#x039E;"> <!ENTITY Omicron "&#x039F;"> <!ENTITY Pi "&#x03A0;"> <!ENTITY Rho "&#x03A1;"> <!ENTITY Sigma "&#x03A3;"> <!ENTITY Tau "&#x03A4;"> <!ENTITY Upsilon "&#x03A5;"> <!ENTITY Phi "&#x03A6;"> <!ENTITY Chi "&#x03A7;"> <!ENTITY Psi "&#x03A8;"> <!ENTITY Omega "&#x03A9;"> <!ENTITY alpha "&#x03B1;"> <!ENTITY beta "&#x03B2;"> <!ENTITY gamma "&#x03B3;"> <!ENTITY delta "&#x03B4;"> <!ENTITY epsilon "&#x03B5;"> <!ENTITY zeta "&#x03B6;"> <!ENTITY eta "&#x03B7;"> <!ENTITY theta "&#x03B8;"> <!ENTITY iota "&#x03B9;"> <!ENTITY kappa "&#x03BA;"> <!ENTITY lambda "&#x03BB;"> <!ENTITY mu "&#x03BC;"> <!ENTITY nu "&#x03BD;"> <!ENTITY xi "&#x03BE;"> <!ENTITY omicron "&#x03BF;"> <!ENTITY pi "&#x03C0;"> <!ENTITY rho "&#x03C1;"> <!ENTITY sigmaf "&#x03C2;"> <!ENTITY sigma "&#x03C3;"> <!ENTITY tau "&#x03C4;"> <!ENTITY upsilon "&#x03C5;"> <!ENTITY phi "&#x03C6;"> <!ENTITY chi "&#x03C7;"> <!ENTITY psi "&#x03C8;"> <!ENTITY omega "&#x03C9;"> <!ENTITY thetasym "&#x03D1;"> <!ENTITY upsih "&#x03D2;"> <!ENTITY piv "&#x03D6;"> <!ENTITY ensp "&#x2002;"> <!ENTITY emsp "&#x2003;"> <!ENTITY thinsp "&#x2009;"> <!ENTITY zwnj "&#x200C;"> <!ENTITY zwj "&#x200D;"> <!ENTITY lrm "&#x200E;"> <!ENTITY rlm "&#x200F;"> <!ENTITY ndash "&#x2013;"> <!ENTITY mdash "&#x2014;"> <!ENTITY lsquo "&#x2018;"> <!ENTITY rsquo "&#x2019;"> <!ENTITY sbquo "&#x201A;"> <!ENTITY ldquo "&#x201C;"> <!ENTITY rdquo "&#x201D;"> <!ENTITY bdquo "&#x201E;"> <!ENTITY dagger "&#x2020;"> <!ENTITY Dagger "&#x2021;"> <!ENTITY bull "&#x2022;"> <!ENTITY hellip "&#x2026;"> <!ENTITY permil "&#x2030;"> <!ENTITY prime "&#x2032;"> <!ENTITY Prime "&#x2033;"> <!ENTITY lsaquo "&#x2039;"> <!ENTITY rsaquo "&#x203A;"> <!ENTITY oline "&#x203E;"> <!ENTITY frasl "&#x2044;"> <!ENTITY euro "&#x20AC;"> <!ENTITY image "&#x2111;"> <!ENTITY weierp "&#x2118;"> <!ENTITY real "&#x211C;"> <!ENTITY trade "&#x2122;"> <!ENTITY alefsym "&#x2135;"> <!ENTITY larr "&#x2190;"> <!ENTITY uarr "&#x2191;"> <!ENTITY rarr "&#x2192;"> <!ENTITY darr "&#x2193;"> <!ENTITY harr "&#x2194;"> <!ENTITY crarr "&#x21B5;"> <!ENTITY lArr "&#x21D0;"> <!ENTITY uArr "&#x21D1;"> <!ENTITY rArr "&#x21D2;"> <!ENTITY dArr "&#x21D3;"> <!ENTITY hArr "&#x21D4;"> <!ENTITY forall "&#x2200;"> <!ENTITY part "&#x2202;"> <!ENTITY exist "&#x2203;"> <!ENTITY empty "&#x2205;"> <!ENTITY nabla "&#x2207;"> <!ENTITY isin "&#x2208;"> <!ENTITY notin "&#x2209;"> <!ENTITY ni "&#x220B;"> <!ENTITY prod "&#x220F;"> <!ENTITY sum "&#x2211;"> <!ENTITY minus "&#x2212;"> <!ENTITY lowast "&#x2217;"> <!ENTITY radic "&#x221A;"> <!ENTITY prop "&#x221D;"> <!ENTITY infin "&#x221E;"> <!ENTITY ang "&#x2220;"> <!ENTITY and "&#x2227;"> <!ENTITY or "&#x2228;"> <!ENTITY cap "&#x2229;"> <!ENTITY cup "&#x222A;"> <!ENTITY int "&#x222B;"> <!ENTITY there4 "&#x2234;"> <!ENTITY sim "&#x223C;"> <!ENTITY cong "&#x2245;"> <!ENTITY asymp "&#x2248;"> <!ENTITY ne "&#x2260;"> <!ENTITY equiv "&#x2261;"> <!ENTITY le "&#x2264;"> <!ENTITY ge "&#x2265;"> <!ENTITY sub "&#x2282;"> <!ENTITY sup "&#x2283;"> <!ENTITY nsub "&#x2284;"> <!ENTITY sube "&#x2286;"> <!ENTITY supe "&#x2287;"> <!ENTITY oplus "&#x2295;"> <!ENTITY otimes "&#x2297;"> <!ENTITY perp "&#x22A5;"> <!ENTITY sdot "&#x22C5;"> <!ENTITY lceil "&#x2308;"> <!ENTITY rceil "&#x2309;"> <!ENTITY lfloor "&#x230A;"> <!ENTITY rfloor "&#x230B;"> <!ENTITY lang "&#x2329;"> <!ENTITY rang "&#x232A;"> <!ENTITY loz "&#x25CA;"> <!ENTITY spades "&#x2660;"> <!ENTITY clubs "&#x2663;"> <!ENTITY hearts "&#x2665;"> <!ENTITY diams "&#x2666;"> ]>'; } }