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+<h1><a class="anchor" name="tutorial0">TinyXML Tutorial</a></h1><h1>Tutorial Preliminary </h1>
+<p>
+These pages contains a bunch of examples of using TinyXml.<p>
+Each demo is written in a standalone function. If you want to try the code, all you need to do is copy/paste the code into a file, then have a main to call it.<p>
+So if the example has a function:<p>
+<div class="fragment"><pre class="fragment">	void write_simple_doc()
+	{
+		...
+	}
+	</pre></div><p>
+then the *complete* program you need to try it is:<p>
+<div class="fragment"><pre class="fragment">	#include "stdafx.h" // &lt;-- you MIGHT need this
+	#include "tinyxml.h" // &lt;-- you definitely need this ;)
+
+	void write_simple_doc()
+	{
+		...
+	}
+
+	void main( void )
+	{
+		write_simple_doc();
+	}
+	</pre></div><p>
+Two example XML datasets/files will be used. The first looks like this:<p>
+<div class="fragment"><pre class="fragment">	&lt;?xml version="1.0" ?&gt;
+	&lt;Hello&gt;World&lt;/Hello&gt;
+	</pre></div><p>
+The other:<p>
+<div class="fragment"><pre class="fragment">	&lt;?xml version="1.0" ?&gt;
+	&lt;poetry&gt;
+		&lt;verse&gt;
+			Alas
+			  Great Whatever
+				Alas (again)
+		&lt;/verse&gt;
+	&lt;/poetry&gt;
+	</pre></div><p>
+<h1>Getting Started </h1>
+<p>
+<h2>Load XML from a file </h2>
+<p>
+Loading a file is as simple as:<p>
+<div class="fragment"><pre class="fragment">	void load_file( )
+	{
+		TiXmlDocument doc( "demo.xml" );
+		bool loadOkay = doc.LoadFile();
+
+		if ( loadOkay )
+		{
+			// Your document is loaded - do what you like
+			// with it.
+			//
+			// Here we'll dump the structure to STDOUT,
+			// just for example
+			dump_to_stdout( &amp;doc );
+		}
+		else
+		{
+			// load failed
+		}
+	}
+	</pre></div><p>
+The ``dump_to_stdout`` function is defined in the section `Dump structure of a Document to STDOUT` below. If you run this program with this XML:<p>
+<div class="fragment"><pre class="fragment">	&lt;?xml version="1.0" ?&gt;
+	&lt;Hello&gt;World&lt;/Hello&gt;
+	</pre></div><p>
+You'll see this:<p>
+<div class="fragment"><pre class="fragment">	DOCUMENT
+	+ DECLARATION
+	+ ELEMENT Hello
+	  + TEXT[World]
+	</pre></div><p>
+<h2>Building Documents Programatically </h2>
+<p>
+Example:<p>
+<div class="fragment"><pre class="fragment">	void write_simple_doc( )
+	{
+		// Make xml: &lt;?xml ..&gt;&lt;Hello&gt;World&lt;/Hello&gt;
+		TiXmlDocument doc;
+		TiXmlDeclaration * decl = new TiXmlDeclaration( "1.0", "", "" );
+		TiXmlElement * element = new TiXmlElement( "Hello" );
+		TiXmlText * text = new TiXmlText( "World" );
+		element-&gt;LinkEndChild( text );
+		doc.LinkEndChild( decl );
+		doc.LinkEndChild( element );
+		
+		dump_to_stdout( &amp;doc );
+		doc.SaveFile( "madeByHand.xml" );
+	}
+	</pre></div><p>
+Alternatively:<p>
+<div class="fragment"><pre class="fragment">	void write_simple_doc2( )
+	{
+		// same as write_simple_doc1 but add each node
+		// as early as possible into the tree.
+	
+		TiXmlDocument doc;
+		TiXmlDeclaration * decl = new TiXmlDeclaration( "1.0", "", "" );
+		doc.LinkEndChild( decl );
+		
+		TiXmlElement * element = new TiXmlElement( "Hello" );
+		doc.LinkEndChild( element );
+		
+		TiXmlText * text = new TiXmlText( "World" );
+		element-&gt;LinkEndChild( text );
+		
+		dump_to_stdout( &amp;doc );
+		doc.SaveFile( "madeByHand2.xml" );
+	}
+	</pre></div><p>
+Both of these produce the same XML, namely:<p>
+<div class="fragment"><pre class="fragment">	&lt;?xml version="1.0" ?&gt;
+	&lt;Hello&gt;World&lt;/Hello&gt;
+	</pre></div><p>
+Or in structure form:<p>
+<div class="fragment"><pre class="fragment">	DOCUMENT
+	+ DECLARATION
+	+ ELEMENT Hello
+	  + TEXT[World]
+	</pre></div><p>
+<h2>Saving Documents to File </h2>
+<p>
+This function:<p>
+<div class="fragment"><pre class="fragment">	void write_simple_doc3( )  
+	{  
+		// This example courtesy of polocolege
+	 
+		TiXmlDocument doc;  
+		TiXmlDeclaration * decl = new TiXmlDeclaration( "1.0", "", "" );  
+		doc.LinkEndChild( decl );  
+	 
+		TiXmlElement * element = new TiXmlElement( "Hello" );  
+		doc.LinkEndChild( element );  
+	 
+		TiXmlText * text = new TiXmlText( "Opening a new salutation" );  
+		element-&gt;LinkEndChild( text );  
+	 
+		TiXmlElement * element2 = new TiXmlElement( "Greeting" );  
+		element-&gt;LinkEndChild( element2 );  
+	 
+		TiXmlText * text2 = new TiXmlText( "How are you?" );  
+		element2-&gt;LinkEndChild( text2 );  
+	 
+		TiXmlElement * element3 = new TiXmlElement( "Language" );  
+		element2-&gt;LinkEndChild( element3 );  
+	 
+		TiXmlText * text3 = new TiXmlText( "English" );  
+		element3-&gt;LinkEndChild( text3 );  
+	 
+		TiXmlElement * element4 = new TiXmlElement( "Exclamation" );  
+		element-&gt;LinkEndChild( element4 );  
+	 
+		TiXmlText * text4 = new TiXmlText( "You have children!" );  
+		element4-&gt;LinkEndChild( text4 );  
+	 
+		dump_to_stdout( &amp;doc );
+		doc.SaveFile( "madeByHand3.xml" );  
+	}  
+	</pre></div><p>
+Produces this structure:<p>
+<div class="fragment"><pre class="fragment">	Document
+	+ Declaration
+	+ Element "Hello"
+	  + Text: [Opening a new salutation]
+	  + Element "Greeting"
+		+ Text: [How are you?]
+		+ Element "Language"
+		  + Text: [English]
+	  + Element "Exclamation"
+		+ Text: [You have children!]
+	</pre></div><p>
+The file ``madeByHand3.xml`` looks exactly like this (including indents):<p>
+<div class="fragment"><pre class="fragment">	&lt;?xml version="1.0" ?&gt;
+	&lt;Hello&gt;Opening a new salutation
+	    &lt;Greeting&gt;How are you?
+	        &lt;Language&gt;English&lt;/Language&gt;
+	    &lt;/Greeting&gt;
+	    &lt;Exclamation&gt;You have children!&lt;/Exclamation&gt;
+	&lt;/Hello&gt;
+	</pre></div><p>
+I was surprised that TinyXml, by default, writes the XML in what other APIs call a "pretty" format - it modifies the whitespace of text of elements that contain other nodes so that writing the tree includes an indication of nesting level.<p>
+I haven't looked yet to see if there is a way to turn off indenting when writing a file - its bound to be easy.<p>
+[Lee: It's easy in STL mode, just use cout &lt;&lt; myDoc. Non-STL mode is always in "pretty" format. Adding a switch would be a nice feature and has been requested.]<p>
+<h1>Iterating Over Documents </h1>
+<p>
+<h2>Dump structure of a Document to STDOUT </h2>
+<p>
+Often when you're starting its helpful and reassuring to know that you're document got loaded as you expect it to.<p>
+Below I've defined a function to walk a document and write contents to STDOUT:<p>
+<div class="fragment"><pre class="fragment">	// a utility function defining a very simple method to indent a line of text
+	const char * getIndent( unsigned int numIndents )
+	{
+		static const char * pINDENT = "                                      + ";
+		static const unsigned int LENGTH = strlen( pINDENT );
+	
+		if ( numIndents &gt; LENGTH ) numIndents = LENGTH;
+	
+		return &amp;pINDENT[ LENGTH-numIndents ];
+	}
+	
+	void dump_to_stdout( TiXmlNode * pParent, unsigned int indent = 0 )
+	{
+		if ( !pParent ) return;
+	
+		TiXmlText *pText;
+		int t = pParent-&gt;Type();
+		printf( "%s", getIndent( indent));
+	
+		switch ( t )
+		{
+		case TiXmlNode::DOCUMENT:
+			printf( "Document" );
+			break;
+	
+		case TiXmlNode::ELEMENT:
+			printf( "Element \"%s\"", pParent-&gt;Value() );
+			break;
+	
+		case TiXmlNode::COMMENT:
+			printf( "Comment: \"%s\"", pParent-&gt;Value());
+			break;
+	
+		case TiXmlNode::UNKNOWN:
+			printf( "Unknown" );
+			break;
+	
+		case TiXmlNode::TEXT:
+			pText = pParent-&gt;ToText();
+			printf( "Text: [%s]", pText-&gt;Value() );
+			break;
+	
+		case TiXmlNode::DECLARATION:
+			printf( "Declaration" );
+			break;
+		default:
+			break;
+		}
+		printf( "\n" );
+	
+		TiXmlNode * pChild;
+	
+		for ( pChild = pParent-&gt;FirstChild(); pChild != 0; pChild = pChild-&gt;NextSibling()) 
+		{
+			dump_to_stdout( pChild, indent+2 );
+		}
+	}
+	</pre></div><p>
+To load a file and dump its structure:<p>
+<div class="fragment"><pre class="fragment">	void load_and_display( )
+	{
+		// important for the poetry demo, but you may not need this 
+		// in your own projects
+		TiXmlBase::SetCondenseWhiteSpace( false );
+	
+		TiXmlDocument doc( "demo.xml" );
+		bool loadOkay = doc.LoadFile();
+	
+		if ( loadOkay )
+		{
+			dump_to_stdout( &amp;doc );
+		}
+		else
+		{
+			printf( "Something went wrong\n" );
+		}
+	}
+	</pre></div><p>
+If you run this with the first XML file you'll see this on STDOUT:<p>
+<div class="fragment"><pre class="fragment">	DOCUMENT
+	+ DECLARATION
+	+ ELEMENT Hello
+	  + TEXT[World]
+	</pre></div><p>
+and on the second XML file:<p>
+<div class="fragment"><pre class="fragment">	DOCUMENT
+	+ DECLARATION
+	+ ELEMENT poetry
+	  + COMMENT:  my great work of art
+	  + ELEMENT verse
+	    + TEXT[
+	Alas
+	  Great Whatever
+	    Alas (again)
+	]
+	</pre></div><p>
+Note that if you call dump_to_stdout like this:<p>
+<div class="fragment"><pre class="fragment">	dump_to_stdout( doc.RootElement());
+	</pre></div><p>
+You'll see this instead:<p>
+<div class="fragment"><pre class="fragment">	ELEMENT Hello
+	+ TEXT[World]
+	</pre></div><p>
+and:<p>
+<div class="fragment"><pre class="fragment">	ELEMENT poetry
+	+ COMMENT:  my great work of art
+	+ ELEMENT verse
+  	+ TEXT[
+	Alas
+	  Great Whatever
+	    Alas (again)
+	] 
+	</pre></div><p>
+<em> Authors and Changes <ul>
+<li>
+Written by Ellers, April 2005  </li>
+<li>
+Minor edits and integration into doc system, Lee Thomason September 2005  </li>
+</ul>
+</em> <hr size="1"><address style="align: right;"><small>Generated on Sat Oct 8 14:15:30 2005 for TinyXml by&nbsp;
+<a href="http://www.doxygen.org/index.html">
+<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.4 </small></address>
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