Date: Jan. 26, 2000
Link: http://msdn.microsoft.com/downloads/webtechnology/xml/xsltconv.asp
Source Author or Organization: Microsoft Corporation

Microsoft's xsl-xslt-converter uses an XSLT style sheet to perform a number of changes on "MSXSL-compliant" stylesheets including: changing the XSL namespace value to the correct URI, adding the new required XSLT version attribute, and converts the outdated XSL pattern syntax implemented from over a year ago to an XPath-compliant syntax. Unfortunately, according to Microsoft's own documentation:

"The resulting style sheet will conform to the subset of the XSLT and XPath recommendations implemented in the Microsoft XML Technology Preview Parser but might also contain elements that will not be processed by XSLT processors from other vendors. Vendor-specific implementations of extension functions will need to be added for full interoperability."