Utterance = Interjection / Vocative / Answer / Sentence
Interjection = I / NP (a)
Vocative = NP o
Answer = NP / VP / PP
Sentence = (taso) (Cond la) (o) NP+ VP (li VP)
Cond = NP / Sentence
NP+ = o / mi / sina / Oword li / NP- li
Oword = any word in tp except: li. la. e, o, pi, mi, sina, [en, anu, a, mu] (probably but status to be decided)
Word = Oword / mi /sina
NP = Word / NP-
NP- = NP Word /
NP pi NP- /
NP Conj NP /
NP Num /
NP pi PP
Conj = en / anu
PP = XPrep NP
XPrep = Prep /
Prep = P / poka / sama /[kepeken] (doesn't work in verb slot) (surely there will be more)
Num = (nanpa) Dig x
Dig = ala / wan / tu / mute / lili [luka / ale / ali] (probably more, like the last, frowned on)
VP = VC (e NP) x (PP)x
VC = NP
= XM VP
XM = M /
The first word in NP is called noun, the words added to the right are modifiers. The first word in VP is a verb, words added to the right are modifiers. If the VP contains e the verb is verb t, otherwise verb i. The NP after e is DO..
This lets in a lot of nonsense, but cutting the weirdies off is more trouble than it is worth -- until someone makes a clear case against them.
o o > o
There is no rule for kin here. It probably belongs in Group F, with one additional use. But, again, ...
The first refinement I see is to narrow the set of NP that can go into XPrep and XM.