Saxon
S9API interface
Command line interfaces
XSLT 2.0 implementation
XPath 2.0 implementation
Saxon extensions to the W3C XSLT/XQuery specifications
XML Schema 1.0 implementation
System Programming Interfaces
Changes specific to .NET
XQJ (JSR 225) interface
Pull processing
Serialization
Localization (natural language support)
Optimizations and performance improvements
Diagnostics and tracing
Internal changes