Microsoft Core XML Services (MSXML) 6.0 gives the server-safe and client components for XML over HTTP and provides a redistributable 64-bit package. It also provides implementations that are standards-conformant of: XSLT 1.0, XPath 1.0, XML Schema (XSD) 1.0, and XML 1.0 (SAX2 & DOM APIs). This software has improved a number of significant stability areas specifically in resource-constrained scenarios. It is compatible to System.Xml 2.0 and W3C Conformant — extensive testing has been done to address several issues in an effort to improve System.Xml 2.0 and W3C compatibility especially in relation to the recommendations of XML Schema 1.0. It is an upgrade for MSXML4 and MSXML3 users but not for those that use older technologies and ProgIDs in MSXML4 and MSXML3.