  It is well known that the internal suplattices in the topos of sheaves on a
locale are precisely the modules on that locale. Using enriched category theory
and a lemma on KZ doctrines we prove (the generalization of) this fact in the
case of ordered sheaves on a small quantaloid. Comparing module-equivalence
with sheaf-equivalence for quantaloids and using the notion of centre of a
quantaloid, we refine a result of F. Borceux and E. Vitale.
