In Preprint 1 we write numerical labels 0 or 1 at each vertex of a Dynkin diagram $D$. We call it a labeling of the graph (Dynkin diagram) $D$.
In Preprint 2 we consider an extended (affine) Dynkin diagram $\tilde{D}$. At each vertex of $\tilde{D}$ we write numerical labels 0, 1, or 2 such that a certain integer linear combination of the labels equals 2. We call it a Kac 2-labeling of $\tilde{D}$.
Now I am going to write Preprint 3, where I would like to use both labelings and Kac 2-labelings. I would like to use a better term than "Kac 2-labelings" in order not to confuse the reader.
Question. What synonyms to "Kac 2-labelings" of a graph (affine Dynkin diagram) can I use? Maybe "Kac 2-markings"? Anything else?