Xalan XSLT processor

Xalan is a tool developed as part of the Apache XML project that transforms DITA source files into rendered output using the DITA XSLT stylesheets.

You need to install either the Xalan XSLT compiler or the SAXON XSLT processor in your DITA processing environment for DITA Open Toolkit to function, but neither processor is part of the Toolkit installation package.

Related information
http://xml.apache.org/xalan-j/