  A map Y -> P^n is determined by a line bundle quotient of (O_Y)^{n+1}. In
this paper, we generalize this description to the case of maps from Y to an
arbitrary smooth toric variety. The data needed to determine such a map
consists of a collection of line bundles on Y together with a section of each
line bundle. Further, the line bundles must satisfy certain compatbility
conditions, and the sections must be nondegenerate in an appropriate sense. In
the case of maps from P^m to a smooth toric variety, we get an especially
simple description that generalizes the usual way of specifying maps between
projective spaces in terms of homogeneous polynomials (of the same degree) that
don't vanish simultaneously.
