CableSwig is used to create interfaces (i.e. "wrappers") to interpreted languages such as Tcl and Python. It was created to produce wrappers for ITK because the toolkit uses C++ structures that SWIG cannot parse (deeply nested template instantiations). CableSwig is a combination tool that uses GCC_XML as the c++ parser. The input files are Cable style input files. The XML produced from the Cable/GCC_XML input files are then parsed and feed into a modified version of SWIG. SWIG is a software development tool that connects programs written in C and C++ with a variety of high-level programming languages. It is used to generate the language bindings to the target language. Currently, Tcl and Python are supported.