Range: containment, clamp, normalization, iteration, subdivision, intersection.Vector: magnitude, normalization, dot/cross, projection, distance, interpolation.Timeline: time-domain named events.Dataset: rows/columns, filter/map/group/stats.Size,Point,Color: geometry/color convenience types.Matrix: shape, transpose, arithmetic, matrix/vector multiplication.TreeDDM: child hierarchy, DFS/BFS walk, find, depth, size.
They integrate with DDM rather than attempting to replace scientific/dataframe libraries.