'''[https://www.tcl-lang.org/man/tcl/TclCmd/filename.htm%|%filename]''' is a section in the reference manual that describes file names in Tcl. ** Description ** A [vfs%|%virtual filesystem] can use an arbitrary scheme for separating components of a file name, so a literal separator character should never appear in a Tcl [script], since it would presume something about a filesystem that it doesn't know. Instead, `[file join]` should always be used to join file names. ** Page Authors ** [pyk]: <<categories>> Documentation | [Arts and crafts of Tcl-Tk programming]