Version 2.2 of XQilla, an open source XQuery 1.0 and XPath 2.0 library and command line utility written in C++, has been released. XQilla is implemented on top of Xerces-C++ and derives from Pathan. Version 2.0 implements the DOM 3 XPath API, and conforms to the both the XQuery and XPath 2.0 recommendations. "This release adds a debugger and debugging API, partial support for XSLT 2.0, and a prototype implementation of higher order functions for XQuery....Although it is possible to run a number of complex transformations there are significant features missing from the implementation, including xsl:include, xsl:import, xsl:output, xsl:result-document, and xsl:sort. If there are any developers interested in helping complete the XSLT 2.0 support, please get in touch with us at email@example.com." XQilla is published under the Apache 2.0 licence.