  This paper solves the global moduli problem for regular holonomic D-modules
with normal crossing singularities on a nonsingular complex projective variety.
This is done by introducing a level structure (which gives rise to
``pre-D-modules''), and then introducing a notion of (semi-)stability and
applying Geometric Invariant Theory to construct a coarse moduli scheme for
semistable pre-D-modules. A moduli is constructed also for the corresponding
perverse sheaves, and the Riemann-Hilbert correspondence is represented by an
analytic morphism between these moduli spaces.
