This is the old XML parsing library provided in the GNOME framework.
XML is a standard to build tag based structured documents.  The
internal document repesentation is as close as possible to the
DOM interfaces.  The interfaces of the XML library are by principle
low level, there is nearly zero abstration.

Some features are:

	- C++ support
	- Updated code to follow more recent specs, added
	  compatibility flag
	- Error handling, use a dedicated, overridable error
	  handling function.
	- Support for CDATA.
	- Keep track of line numbers for better error reporting.
	- Support for PI (SAX one).