'''[Tcl Dev Kit] Cross Reference Tool''' ** Documentation ** [http://docs.activestate.com/tdk/5.4/Xref.html%|%official reference]: ** Description ** The '''Cross Reference Tool (XRef)''' simplifies building, debugging and maintaining Tcl code. * Understand complex code at a glance with a visual guide to where code is defined, declared, used and located. * Easily view relationships among Tcl code components, including packages, files, namespaces, commands and variables. * Extract Tcl component information from programs and packages contained in TclApp (or Prowrap) projects, Tcl Dev Kit Package definitions (".tap" files) and Komodo IDE project files. <> Tcl Dev Kit