VTD-XML is a next generation XML parser that goes beyond DOM and SAX in terms of performance, memory, and ease of use. Currently, it only supports built-in entity references (" &s; ' > <). Other features include XML indexing (due to inherent persistence of VTD) and incremental updating. Its memory usage is typically between 1.3 to 1.5 times the size of the XML document. The new release 1.6 introduces a new C# version in addition to usability enhancements with minor bugfixes.