UV node (complex)

Have a UV node that allows you to specify the min U, max U, min V, max V. It would output a UV node gradated to match those ranges.
Purpose: This would simplify node setups for sampling / reversing textures.

UV (uMin 0, uMax 0.25, vMin 0.25, vMax 0.5) = Could be used to sample the first column, second row of a 4x4 grid of images.
UV (uMin 1, uMax 0, vMin 0, vMax 1) = Reversed U map