include "basics/types.ma". include "ASM/BitVectorTrie.ma". include "common/Identifiers.ma". axiom LabelTag : String. definition label ≝ identifier LabelTag. definition label_eq : ∀x,y:label. (x=y) + (x≠y) ≝ identifier_eq ?. definition graph : Type[0] → Type[0] ≝ identifier_map LabelTag.