[libxml2]Add libxml2 library

libxml2/test/c14n/with-comments/doc.dtd

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+<!-- Empty DTD -->

libxml2/test/c14n/with-comments/example-1.xml

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+<?xml version="1.0"?>
+
+<?xml-stylesheet   href="doc.xsl"
+   type="text/xsl"   ?>
+
+<!DOCTYPE doc SYSTEM "doc.dtd">
+
+<doc>Hello, world!<!-- Comment 1 --></doc>
+
+<?pi-without-data     ?>
+
+<!-- Comment 2 -->
+
+<!-- Comment 3 -->

libxml2/test/c14n/with-comments/example-2.xml

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+<doc>
+   <clean>   </clean>
+   <dirty>   A   B   </dirty>
+   <mixed>
+      A
+      <clean>   </clean>
+      B
+      <dirty>   A   B   </dirty>
+      C
+   </mixed>
+</doc>

libxml2/test/c14n/with-comments/example-3.xml

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+<!DOCTYPE doc [<!ATTLIST e9 attr CDATA "default">]>
+<doc>
+   <e1   />
+   <e2   ></e2>
+   <e3    name = "elem3"   id="elem3"    />
+   <e4    name="elem4"   id="elem4"    ></e4>
+   <e5 a:attr="out" b:attr="sorted" attr2="all" attr="I'm"
+       xmlns:b="http://www.ietf.org" 
+       xmlns:a="http://www.w3.org"
+       xmlns="http://www.uvic.ca"/>
+   <e6 xmlns="" xmlns:a="http://www.w3.org">
+       <e7 xmlns="http://www.ietf.org">
+           <e8 xmlns="" xmlns:a="http://www.w3.org">
+               <e9 xmlns="" xmlns:a="http://www.ietf.org"/>
+           </e8>
+       </e7>
+   </e6>
+</doc>

libxml2/test/c14n/with-comments/example-4.xml

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+<!DOCTYPE doc [<!ATTLIST normId id ID #IMPLIED>]>
+<doc>
+   <text>First line&#x0d;&#10;Second line</text>
+   <value>&#x32;</value>
+   <compute><![CDATA[value>"0" && value<"10" ?"valid":"error"]]></compute>
+   <compute expr='value>"0" &amp;&amp; value&lt;"10" ?"valid":"error"'>valid</compute>
+   <norm attr=' &apos;   &#x20;&#13;&#xa;&#9;   &apos; '/>
+   <normId id=' &apos;   &#x20;&#13;&#xa;&#9;   &apos; '/>
+</doc>

libxml2/test/c14n/with-comments/example-5.xml

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+<!DOCTYPE doc [
+<!ATTLIST doc attrExtEnt ENTITY #IMPLIED>
+<!ENTITY ent1 "Hello">
+<!ENTITY ent2 SYSTEM "world.txt">
+<!ENTITY entExt SYSTEM "earth.gif" NDATA gif>
+<!NOTATION gif SYSTEM "viewgif.exe">
+]>
+<doc attrExtEnt="entExt">
+   &ent1;, &ent2;!
+</doc>
+
+<!-- Let world.txt contain "world" (excluding the quotes) -->

libxml2/test/c14n/with-comments/example-6.xml

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+<?xml version="1.0" encoding="ISO-8859-1"?>
+<doc>&#169;</doc>

libxml2/test/c14n/with-comments/example-7.xml

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+<!DOCTYPE doc [
+<!ATTLIST e2 xml:space (default|preserve) 'preserve'>
+<!ATTLIST e3 id ID #IMPLIED>
+]>
+<doc xmlns="http://www.ietf.org" xmlns:w3c="http://www.w3.org">
+   <e1>
+      <e2 xmlns="">
+         <e3 id="E3"/>
+      </e2>
+   </e1>
+</doc>

libxml2/test/c14n/with-comments/example-7.xpath

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+<XPath xmlns:ietf="http://www.ietf.org" >
+    (//.|//@*|//namespace::*)
+    [
+	self::ietf:e1
+	    or
+	(parent::ietf:e1 and not(self::text() or self::e2))
+	    or
+	count(id("E3")|ancestor-or-self::node()) = count(ancestor-or-self::node())
+    ]
+</XPath>

libxml2/test/c14n/with-comments/world.txt

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+world