in i3 I can use just an F Key (ie f2) and asign it to a shotcut to start an 
application -- when using the same metholid in dwm it's not working, I have 
yet to find any documentaion on this. what syntex to use for F keys 

 this is what i am doing 

in i3 config it's as easy as this

bindsym F2  exec --no-startup-id terminology

in DWM wm this is what I used, but it is not accepting the syntex a simple 
F2 

static const Rule rules[] = {
        /* class      instance    title       tags mask     isfloating   
monitor */
 
        { "terminology", NULL,              0,            True,        -1 },



};

...

static const char *terminologycmd[] = {"terminology", NULL};


.......
{ SUPKEY,                       F2,        spawn,         {.v = 
terminologycmd }},