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<?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
 * 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
 * @author Ryan Parman
 * @author Geoffrey 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 (function_exists('Mf2\parse')) {
			// 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.
			$position = 0;
			while ($position = strpos($data, 'h-feed', $position)) {
				$start = $position < 200 ? 0 : $position - 200;
				$check = substr($data, $start, 400);
				if (preg_match('/class="[^"]*h-feed/', $check)) {
					return $this->parse_microformats($data, $url);
				}
				$position += 7;
			}
			$position = 0;
			while ($position = strpos($data, 'h-entry', $position)) {
				$start = $position < 200 ? 0 : $position - 200;
				$check = substr($data, $start, 400);
				if (preg_match('/class="[^"]*h-entry/', $check)) {
					return $this->parse_microformats($data, $url);
				}
				$position += 7;
			}
		}

// 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>&</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;
		}
		else
		{
			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;
			}
			else
			{
				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 = $category ? '' : '';
				return '<a class="h-card" href="'.$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 = $mf_item;
				break;
			}
			// Also look for an h-feed in the children of each top level item.
			if (!isset($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 = $mf_item;
				break;
			}
		}
		if (isset($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 {
			$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 (strpos($content, $photo) === false) {
							$photo_list[] = $photo;
						}
					}
					// When there's more than one photo show the first and use a lightbox.
					$count = count($photo_list);
					if ($count > 1) {
						$description = '';
						for ($j = 0; $j < $count; $j++) {
							$hidden = $j === 0 ? '' : 'class="hidden" ';
							$description .= '<a href="'.$photo_list[$j].'" '.$hidden.
								'data-lightbox="image-set-'.$i.'">'.
								'<img src="'.$photo_list[$j].'"></a>';
						}
						$description .= ' '.$count.' photos';
					}
					else if ($count == 1) {
						$description = '<img src="'.$photo_list[0].'">';
					}
				}
				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]['value'])) {
						$in_reply_to = $entry['properties']['in-reply-to'][0]['value'];
						$description .= ' '.
							'<a href="'.$in_reply_to.'">'.$in_reply_to.'</a>';
					}
					$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' => $feed_author['properties']['photo'][0]))))));
		}
		// Use the a name given for the h-feed, or get the title from the html.
		if ($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 " "> <!ENTITY iexcl "¡"> <!ENTITY cent "¢"> <!ENTITY pound "£"> <!ENTITY curren "¤"> <!ENTITY yen "¥"> <!ENTITY brvbar "¦"> <!ENTITY sect "§"> <!ENTITY uml "¨"> <!ENTITY copy "©"> <!ENTITY ordf "ª"> <!ENTITY laquo "«"> <!ENTITY not "¬"> <!ENTITY shy ""> <!ENTITY reg "®"> <!ENTITY macr "¯"> <!ENTITY deg "°"> <!ENTITY plusmn "±"> <!ENTITY sup2 "²"> <!ENTITY sup3 "³"> <!ENTITY acute "´"> <!ENTITY micro "µ"> <!ENTITY para "¶"> <!ENTITY middot "·"> <!ENTITY cedil "¸"> <!ENTITY sup1 "¹"> <!ENTITY ordm "º"> <!ENTITY raquo "»"> <!ENTITY frac14 "¼"> <!ENTITY frac12 "½"> <!ENTITY frac34 "¾"> <!ENTITY iquest "¿"> <!ENTITY Agrave "À"> <!ENTITY Aacute "Á"> <!ENTITY Acirc "Â"> <!ENTITY Atilde "Ã"> <!ENTITY Auml "Ä"> <!ENTITY Aring "Å"> <!ENTITY AElig "Æ"> <!ENTITY Ccedil "Ç"> <!ENTITY Egrave "È"> <!ENTITY Eacute "É"> <!ENTITY Ecirc "Ê"> <!ENTITY Euml "Ë"> <!ENTITY Igrave "Ì"> <!ENTITY Iacute "Í"> <!ENTITY Icirc "Î"> <!ENTITY Iuml "Ï"> <!ENTITY ETH "Ð"> <!ENTITY Ntilde "Ñ"> <!ENTITY Ograve "Ò"> <!ENTITY Oacute "Ó"> <!ENTITY Ocirc "Ô"> <!ENTITY Otilde "Õ"> <!ENTITY Ouml "Ö"> <!ENTITY times "×"> <!ENTITY Oslash "Ø"> <!ENTITY Ugrave "Ù"> <!ENTITY Uacute "Ú"> <!ENTITY Ucirc "Û"> <!ENTITY Uuml "Ü"> <!ENTITY Yacute "Ý"> <!ENTITY THORN "Þ"> <!ENTITY szlig "ß"> <!ENTITY agrave "à"> <!ENTITY aacute "á"> <!ENTITY acirc "â"> <!ENTITY atilde "ã"> <!ENTITY auml "ä"> <!ENTITY aring "å"> <!ENTITY aelig "æ"> <!ENTITY ccedil "ç"> <!ENTITY egrave "è"> <!ENTITY eacute "é"> <!ENTITY ecirc "ê"> <!ENTITY euml "ë"> <!ENTITY igrave "ì"> <!ENTITY iacute "í"> <!ENTITY icirc "î"> <!ENTITY iuml "ï"> <!ENTITY eth "ð"> <!ENTITY ntilde "ñ"> <!ENTITY ograve "ò"> <!ENTITY oacute "ó"> <!ENTITY ocirc "ô"> <!ENTITY otilde "õ"> <!ENTITY ouml "ö"> <!ENTITY divide "÷"> <!ENTITY oslash "ø"> <!ENTITY ugrave "ù"> <!ENTITY uacute "ú"> <!ENTITY ucirc "û"> <!ENTITY uuml "ü"> <!ENTITY yacute "ý"> <!ENTITY thorn "þ"> <!ENTITY yuml "ÿ"> <!ENTITY OElig "Œ"> <!ENTITY oelig "œ"> <!ENTITY Scaron "Š"> <!ENTITY scaron "š"> <!ENTITY Yuml "Ÿ"> <!ENTITY fnof "ƒ"> <!ENTITY circ "ˆ"> <!ENTITY tilde "˜"> <!ENTITY Alpha "Α"> <!ENTITY Beta "Β"> <!ENTITY Gamma "Γ"> <!ENTITY Epsilon "Ε"> <!ENTITY Zeta "Ζ"> <!ENTITY Eta "Η"> <!ENTITY Theta "Θ"> <!ENTITY Iota "Ι"> <!ENTITY Kappa "Κ"> <!ENTITY Lambda "Λ"> <!ENTITY Mu "Μ"> <!ENTITY Nu "Ν"> <!ENTITY Xi "Ξ"> <!ENTITY Omicron "Ο"> <!ENTITY Pi "Π"> <!ENTITY Rho "Ρ"> <!ENTITY Sigma "Σ"> <!ENTITY Tau "Τ"> <!ENTITY Upsilon "Υ"> <!ENTITY Phi "Φ"> <!ENTITY Chi "Χ"> <!ENTITY Psi "Ψ"> <!ENTITY Omega "Ω"> <!ENTITY alpha "α"> <!ENTITY beta "β"> <!ENTITY gamma "γ"> <!ENTITY delta "δ"> <!ENTITY epsilon "ε"> <!ENTITY zeta "ζ"> <!ENTITY eta "η"> <!ENTITY theta "θ"> <!ENTITY iota "ι"> <!ENTITY kappa "κ"> <!ENTITY lambda "λ"> <!ENTITY mu "μ"> <!ENTITY nu "ν"> <!ENTITY xi "ξ"> <!ENTITY omicron "ο"> <!ENTITY pi "π"> <!ENTITY rho "ρ"> <!ENTITY sigmaf "ς"> <!ENTITY sigma "σ"> <!ENTITY tau "τ"> <!ENTITY upsilon "υ"> <!ENTITY phi "φ"> <!ENTITY chi "χ"> <!ENTITY psi "ψ"> <!ENTITY omega "ω"> <!ENTITY thetasym "ϑ"> <!ENTITY upsih "ϒ"> <!ENTITY piv "ϖ"> <!ENTITY ensp " "> <!ENTITY emsp " "> <!ENTITY thinsp " "> <!ENTITY zwnj "‌"> <!ENTITY zwj "‍"> <!ENTITY lrm "‎"> <!ENTITY rlm "‏"> <!ENTITY ndash "–"> <!ENTITY mdash "—"> <!ENTITY lsquo "‘"> <!ENTITY rsquo "’"> <!ENTITY sbquo "‚"> <!ENTITY ldquo "“"> <!ENTITY rdquo "”"> <!ENTITY bdquo "„"> <!ENTITY dagger "†"> <!ENTITY Dagger "‡"> <!ENTITY bull "•"> <!ENTITY hellip "…"> <!ENTITY permil "‰"> <!ENTITY prime "′"> <!ENTITY Prime "″"> <!ENTITY lsaquo "‹"> <!ENTITY rsaquo "›"> <!ENTITY oline "‾"> <!ENTITY frasl "⁄"> <!ENTITY euro "€"> <!ENTITY image "ℑ"> <!ENTITY weierp "℘"> <!ENTITY real "ℜ"> <!ENTITY trade "™"> <!ENTITY alefsym "ℵ"> <!ENTITY larr "←"> <!ENTITY uarr "↑"> <!ENTITY rarr "→"> <!ENTITY darr "↓"> <!ENTITY harr "↔"> <!ENTITY crarr "↵"> <!ENTITY lArr "⇐"> <!ENTITY uArr "⇑"> <!ENTITY rArr "⇒"> <!ENTITY dArr "⇓"> <!ENTITY hArr "⇔"> <!ENTITY forall "∀"> <!ENTITY part "∂"> <!ENTITY exist "∃"> <!ENTITY empty "∅"> <!ENTITY nabla "∇"> <!ENTITY isin "∈"> <!ENTITY notin "∉"> <!ENTITY ni "∋"> <!ENTITY prod "∏"> <!ENTITY sum "∑"> <!ENTITY minus "−"> <!ENTITY lowast "∗"> <!ENTITY radic "√"> <!ENTITY prop "∝"> <!ENTITY infin "∞"> <!ENTITY ang "∠"> <!ENTITY and "∧"> <!ENTITY or "∨"> <!ENTITY cap "∩"> <!ENTITY cup "∪"> <!ENTITY int "∫"> <!ENTITY there4 "∴"> <!ENTITY sim "∼"> <!ENTITY cong "≅"> <!ENTITY asymp "≈"> <!ENTITY ne "≠"> <!ENTITY equiv "≡"> <!ENTITY le "≤"> <!ENTITY ge "≥"> <!ENTITY sub "⊂"> <!ENTITY sup "⊃"> <!ENTITY nsub "⊄"> <!ENTITY sube "⊆"> <!ENTITY supe "⊇"> <!ENTITY oplus "⊕"> <!ENTITY otimes "⊗"> <!ENTITY perp "⊥"> <!ENTITY sdot "⋅"> <!ENTITY lceil "⌈"> <!ENTITY rceil "⌉"> <!ENTITY lfloor "⌊"> <!ENTITY rfloor "⌋"> <!ENTITY lang "〈"> <!ENTITY rang "〉"> <!ENTITY loz "◊"> <!ENTITY spades "♠"> <!ENTITY clubs "♣"> <!ENTITY hearts "♥"> <!ENTITY diams "♦"> ]>';
	}
}