XSLT 2.0 implementation
XQuery 1.0 implementation
Functions, operators, and data types for XPath 2.0
XML Schema 1.0 implementation
Changes specific to .NET
JAXP interface (transformation, XPath, schema processing)
System Programming Interfaces
Internal changes
Optimizations and performance improvements
Handling of source documents
Using Saxon from Ant
Support for DOM and other external tree models