section ‹Basic DFS Framework› theory DFS_Framework imports Param_DFS "Invars/DFS_Invars_Basic" "Impl/Structural/Tailrec_Impl" "Impl/Structural/Rec_Impl" "Impl/Data/Simple_Impl" "Impl/Data/Restr_Impl" begin text ‹Entry point for the DFS framework, with basic invariants, tail-recursive and recursive implementation, and basic state data structures.› end