  We update the constraints on the parameters of the quark flavour mixing
matrix $V_{CKM}$ in the standard model using the latest experimental and
theoretical results as input. We present the 95$\%$ C.L. allowed region of the
unitarity triangle and the corresponding ranges for the ratio $\vert
V_{td}/V_{ts} \vert$ and for the quantities $\sin 2\alpha$, $\sin 2\beta$ and
$\sin^2\gamma$, which characterize CP-violating rate asymmetries in $B$-decays.
The SM prediction for the $\bs$-$\bsb$ mixing ratio $\xs$ is also presented.
