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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html">
<style type="text/css">
</style>
<title>Libxml2 Parsers Interfaces tutorial</title>
</head>
<body bgcolor="#fffacd" text="#000000">
<h1 align="center">Libxml2 Parsers Interfaces tutorial</h1>
<p></p>
<p>This document provides an overview of the the different parsers interfaces
provided by libxml2. There is 2 parsers available to deal with both XML and
HTML, which can be used with 3 groups of APIs offering callbacks, streaming
or tree results, and then there is different ways to provide the data to the
parser. This document describes the set of interfaces available in version
2.6.5:</p>
<ul>
<li><a href="#Descriptio">Description of the parsers</a></li>
<li><a href="#callback">The callback based SAX(2) interface</a></li>
<li><a href="#xmlReader">The xmlReader interface</a></li>
<li><a href="#tree">The tree interface</a></li>
<li><a href="#Parser">Parser in pull mode</a></li>
<li><a href="#Parser1">Parser in push mode</a></li>
</ul>
<h2><a name="Descriptio">Description of the parsers</a></h2>
<p>The parser are the core piece of the library which consumes the data,
analyze and check the content and structure and returns the the informations
and errors in a structured fashion to the application. The C structure <a
href="html/libxml-tree.html#xmlParserCtxt">xmlParserCtxt </a>driving this
process is public but should rather be used through the available APIs. It is
the same for the HTML and XML parsers though most of the data are used only
for XML parsing.</p>
<h2><a name="callback">The callback based SAX(2) interface</a></h2>
<p>The SAX callback interface is the lowest level interface available from
the parsers, all the other interfaces are actually built on top of this very
low level layer. It is really fast but somewhat complex due to the callback
programming model and lack of advanced features like validation. The
principle is that as the parser is making progresses through the document
data it will indicate the application of the informations found using
callback registered when building the parser. </p>
<h2><a name="xmlReader">The xmlReader interface</a></h2>
<h2><a name="tree">The tree interface</a></h2>
<h2><a name="Parser">Parser in pull mode</a></h2>
<h2><a name="Parser1">Parser in push mode</a></h2>
<p><a href="mailto:veillard@redhat.com">Daniel Veillard</a></p>
<p>$Id$</p>
<p></p>
</body>
</html>
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