To be able to extend BinProlog and possibly embedd it as logic engine in your no run-time fee application you will need a BinProlog C-source code licence. See the files SOURCE.LICENCE and PRICING for more information. You can also interact with other languages under UNIX using the bidireactional pipe based interface starting from BinProlog's Tcl/Tk interfaced (see directory TCL).
The following sequence of quick examples shows how it works.