Measurement of the structure functions F2 and xF3 and comparison with QCD predictions including kinematical and dynamical higher twist effects by Varvell, K, Cooper-Sarkar, A, Parker, M, Sansum, R, Aderholz, M, Armenise, N, Baton, J, Bullock, F, Berggren, M, Bertrand, D, Brisson, V, Burkot, W, Calcchio, M, Claytoh, E, Coghen, T, Erriquez, O, Fitch, P, Gerbier, G, Guy, J, Hulth, P, Iaselli, G, Jones, G, Kasper, P, Klein, H, Kochowski, C