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R101 / Generalization
Anchored Binary Stem is a Projecting Binary Stem or Counterpart Binary Stem
These are the two roles played by a Binary Stem that has a user specified anchor position. In the projecting case, the Stem serves to establish the x or y coordinate of a line shared by a corresponding Floating Binary Stem. In the counterpart case, two Anchored Binary Stems are the terminating points of a line bent at least once.