  We consider a boundary value problem of the stationary transport equation
with the incoming boundary condition in two or three dimensional bounded convex
domains. We discuss discontinuity of the solution to the boundary value problem
arising from discontinuous incoming boundary data, which we call the
boundary-induced discontinuity. In particular, we give two kinds of sufficient
conditions on the incoming boundary data for the boundary-induced
discontinuity. We propose a method to reconstruct attenuation coefficient from
jumps in boundary measurements.
