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Changes in Release 9.9.1

About Saxon
Change History
Licensing
Configuration
Using XSLT
Using XQuery
Source Documents
Schema Processing
XPath API for Java
Saxon on .NET
Extensibility
Saxon Extensions
Sample Saxon Applications
Saxon SQL Extension
XSLT Element Reference
XPath Expression Syntax
Function Library
Standards Conformance
Using this Documentation

Changes in Release 9.9.1 (21 January 2019)

XSLT 3.0 implementation
XPath 3.1 implementation
Functions, operators, and data types for XPath 3.1
XML Schema 1.1 implementation
Saxon extensions to the W3C XSLT/XQuery specifications
S9API interface
Changes specific to .NET
Internal changes
Optimizations and performance improvements
Diagnostics and tracing

Saxon Developer Guide (Non-JavaScript Version)