| \chapter{Structured Markup Processing Tools | 
 |          \label{markup}} | 
 |  | 
 | Python supports a variety of modules to work with various forms of | 
 | structured data markup.  This includes modules to work with the | 
 | Standard Generalized Markup Language (SGML) and the Hypertext Markup | 
 | Language (HTML), and several interfaces for working with the | 
 | Extensible Markup Language (XML). | 
 |  | 
 | It is important to note that modules in the \module{xml} package | 
 | require that there be at least one SAX-compliant XML parser available. | 
 | Starting with Python 2.3, the Expat parser is included with Python, so | 
 | the \refmodule{xml.parsers.expat} module will always be available. | 
 | You may still want to be aware of the \ulink{PyXML add-on | 
 | package}{http://pyxml.sourceforge.net/}; that package provides an | 
 | extended set of XML libraries for Python. | 
 |  | 
 | The documentation for the \module{xml.dom} and \module{xml.sax} | 
 | packages are the definition of the Python bindings for the DOM and SAX | 
 | interfaces. | 
 |  | 
 | \localmoduletable | 
 |  | 
 | \begin{seealso} | 
 |   \seetitle[http://pyxml.sourceforge.net/] | 
 |            {Python/XML Libraries} | 
 |            {Home page for the PyXML package, containing an extension | 
 |             of \module{xml} package bundled with Python.} | 
 | \end{seealso} |