CodeSynthesis XSD is an XML Data Binding compiler for C++ developed by Code Synthesis and dual-licensed under the GNU GPL and a proprietary license. Given an XML instance specification (XML Schema), it generates C++ classes that represent the given vocabulary as well as parsing and serialization code. It is supported on a large number of platforms, including AIX, GNU/Linux, HP-UX, Mac OS X, Solaris, Windows, HP OpenVMS, and IBM z/OS.