Relevant passage of the sutta:
``katamaa ca, raahula, aakaasadhaatu? aakaasadhaatu siyaa ajjhattikaa,
siyaa baahiraa. katamaa ca, raahula, ajjhattikaa aakaasadhaatu? ya.m
ajjhatta.m
paccatta.m aakaasa.m aakaasagata.m upaadinna.m, seyyathida.m --
ka.n.nacchidda.m naasacchidda.m²
"And what, Rahula, is the space element?
The space element may be internal or external.
And what, Rahula, is the internal space element?
That, internally, and individually, is space, empty, and clung to,
namely: the orifice of the ear, nose, mouth.²
cavity in the ear, meaning, opening in the ear, not touched by flesh and
blood, etc.
naasacchiddaadiisupi eseva nayo.
With regard to cavity in the nose etc. this is also (according to) this
system (of teaching).
*****
Remarks: as regards,
<anuppattidhammata.m aapaadessaamii''ti.>
I shall now make him understand what he did not grasp according to the
truth.²
anupattidhammata.m can be read as: anu-patti or as an-upatti. I chose the
latter, thinking of the context, comparing subco, which had unlisted words.
dhammata.m: not sure.
This is subco: sammasanuupagattaa, asammasanuupaga.m aakaasadhaatu.m atha
kasmaa
vitthaaresiiti .