xterm selection 

Newsgroups: comp.unix.shell
> Is it possible to make xterm select a whole word ( file.txt ) for example
> when I double click it, instead of the part before the dot only ?

man xterm:

charClass (class CharClass)
        Specifies comma-separated lists of  character  class
        bindings  of  the  form [low-]high:value.  These are
        used in determining which sets of characters  should
        be  treated  the same when doing cut and paste.  See
        the section on specifying character classes.

Thomas E. Dickey