well, it's a bit more complicated than that, though. what do you make of willow/tara? in your definition it's not slash. at what point, however, did it stop being so? when it became clear text? So the same fic set earlier in the season is slash and then it becomes not slash? who decides when it's text?

All i'm trying to say here, i guess, is that the edges are very unclear. As i just argued extensively in my journal. What if you do an AU where you change the names and the guys are barely recognizable. At what point would you stop calling it slash? Or, asked differently, if I give you an OC slash fic and tell you it's based on a little known tv series, you'll read it as slash, right? I've started thinking of OC slash today as a simulacrum, a copy/derivation without an original :-)

I think terminology changes and fandom certainly has a tendency to change definitions over time and as needed. [b/c in your definition RPS isn't slash either, right?]