  It has been suggested that a $dS_{d+1}$ spacetime of radius $R_{ds}$ has a
holographic dual, living at future space-like infinity ${\cal I}^+$, with the
bulk wave function being dual to the partition function of the boundary theory,
[arXiv:astro-ph/0210603v5]. We consider some aspects of this correspondence.
For under damped scalars with mass $M^2R_{ds}^2>{d^2\over4}$, belonging to the
principal series, we show that for the Bunch Davies vacuum a suitable source in
the boundary theory can be identified in terms of the coherent state
representation of the wave function. We argue that terms in the resulting
correlation functions, which are independent of the late time cut-off, satisfy
the Ward identities of a conformal field theory. We also discuss other ways to
identify sources, both in the under damped and the over damped case, where
$M^2R_{ds}^2<{d^2\over4}$, and argue that these too can lead to correlators
satisfying the Ward identities of a CFT. Some comments on the violation of
reflection positivity, and the cut-off dependent terms, along with some
explicit checks and sample calculations, are also included.
