Updated results from the appearance searches for nu(mu) --> nu(tau) and nu(
e) --> nu(tau) oscillations in the full NOMAD data sample are reported. The
increased data and the use of more refined kinematic schemes for the nu(ta
u) CC selection allow a significant improvement of the overall sensitivity.
The "blind analysis" of both the deep-inelastic and the low multiplicity s
amples yields no evidence for an oscillation signal. In the two-family osci
llation scenario, this sets a 90% C.L. region in the sin(2)2 theta(mu tau)
- Delta m(2) plane which includes sin(2)2 theta(mu tau) < 4.4 X 10(-4) at l
arge Delta m(2) and Delta m(2) < 0.8 eV(2)/c(4) at sin(2)2 theta(mu tau) =
1. The corresponding contour in the nu(e) --> nu(tau) oscillation hypothesi
s results in sin(2)2 theta(e tau) < 2.2 X 10(-2) at large Delta m(2) and De
lta m(2) < 6.5 eV(2)/c(4) at sin(2)2 theta(e tau) = 1. (C) 2000 Elsevier Sc
ience B.V. All rights reserved.