I modified your original input: 
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"[
<!ENTITY atad 'data'>
<!ATTLIST html
    xmlns:xsi CDATA #FIXED "http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation CDATA #IMPLIED  > ]>
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.w3.org/1999/xhtml
    http://www.w3.org/2002/08/xhtml/xhtml1-strict.xsd">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"
+ />
    <title>Hello, World</title>
    <script type="text/javascript">
//<![CDATA[
console.log(' <div class="data" id="Hello">World</div> ');
//]]>
    </script>
</head>
<body>
<div class="data" id="Zero" />
<div class="data" id="One">Monday</div><div class="data" id="Two">Tues
+day</div>
<div id="Three" class='data'>Wednes<div id="day">day</div></div>
<div class="&atad;" id='Four'><b>Thursday</b></div>

[download]
etc. Four was missing from the output for both the libraries.

($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,

[download]

In reply to Re^5: Parsing HTML/XML with Regular Expressions by choroba
in thread Parsing HTML/XML with Regular Expressions by haukex

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