I'm going to keep writing this post until I actually say something close to what I mean to say.
Let's start with the "material." First, Heidegger from "The End of Philosophy and the Task of Thinking:"
The forest clearing [or opening] is experienced in contrast to dense forest, called Dickung in our older language. The substantive Lichtung goes back to the verb lichten. The adjective licht is the same word as “open.” To open something means to make it light, free and open, e.g., to make the forest free of trees at one place. The free space thus originating is the clearing. What is light in the sense of being free and open has nothing in common with the adjective “light” which means “bright,” neither linguistically nor factually. This is to be observed for the difference between openness and light. Still, it is possible that a factual relation between the two exists. Light can stream into the clearing, into its openness, and let brightness play with darkness in it. But light never first creates openness. Rather, light presupposes openness. However, the clearing, the open region, is not only free for brightness and darkness but also for resonance and echo, for sound and the diminishing of sound. The clearing is the open region for everything that becomes present and absent.
Next, Charles Olson on projective verse
if he stays inside himself, if he is contained within his nature as he is participant in the larger force, he will be able to listen, and his hearing through himself will give him secret objects share. And by an inverse law his shapes will make their own way. It is in this sense that the projective act, which is the artist's act in the larger field of objects, leads to dimensions larger than the man. For a man's problem, the moment he takes up speech in all its fullness, is to give his work his seriousness, a seriousness sufficient to cause the thing he makes to try to take its place alongside the things of nature. This is not easy. Nature works from reverence, even in her destructions (species go down with a crash). But breath is man's special qualificiation as animal. Sound is a dimension he has extended. Language is one of his proudest acts. And when a poet rests in these as they are in himself (in his physiology, if you like, but the life in him, for all that) then he, if he chooses to speak from these roots, works in that area where nature has given him size, projective size.
The inevitable (for me) Deleuze and Guattari passage (from A Thousand Plateaus):
weapons have a priveleged relation with projection. Anything that throws or is thrown is fundamentally a weapon and propulsion is its essential moment. The weapon is ballistic; the very notion of the problem is related to the war machine ... One could also say that the tool encounters resistances, to be conquered or put to use, while the weapon has to do with counterattack, to be avoided or invented (the counterattack is in fact the precipitating and inventive fact in the war machine, to the extent that it is not simply reducible to a quantitative rivalry or defensive parade). (395)
Finally, Derrida from Aporias, where, echoing the passage above, we can see that the word problem:
can signifiy projection or protection, that which one poses or throws in front of oneself, either as the projection of a project, of a task to accomplish, or as the protection created by a substitute, a prosthesis that we put forth in order to represent, replace, shelter, or dissimulate ourselves, or so as to hide something unavowable--like a shield (11).
Ok, that's enough material. Now for some serial integration of these concepts with punceptual(?) notions of open and composition.