Whats the difference between MSXML, MSXML2, and MSXML3?
XML has undergone a number of iterations in the past three years, and it’s perhaps not surprising that there are different versions of the Microsoft XML parser in existence. Internet Explorer 4.0 contained an early version of the XML parser, one that predates the existence of XSL, XML data, or most other XML technologies (and that has a completely different DOM model). This early version of the parser is contained in the MSXML.dll library. You can upgrade your parser to a more current one from the MSDN XML Developer Center. It is highly recommended that you upgrade to the new parser because it is far superior. Internet Explorer 5.0 includes the MSXML 2.0 parser, which contained preliminary versions of XSL and XML Schema. MSXML2 is the version of the parser that ships with SQL Server 2000. MSXML2 contains many performance-enhancing features and, in general, has improved performance and scalability. MSXML3 is the version that is currently shipping as a Technology Preview. MSXML3 includes
