Packaging, installation, and licensing changes
XSLT 2.0 implementation
XQuery 1.0 implementation
Functions, operators, and data types for XPath 2.0
XML Schema 1.0 implementation
Serialization
Schema-aware XSLT and XQuery processing
Saxon extensions to the W3C XSLT/XQuery specifications
Extensibility mechanisms
System Programming Interfaces
Internal changes
Support for DOM and other external tree models