Trees within tree families

Each tree begins with either an (alpha) or a (beta) symbol, indicating whether it is an initial or auxiliary tree, respectively. Following an or a the name may additionally contain one of:

I	imperative
E	ergative
N0,1,2	relative clause{position}
G	NP gerund
D	Determiner gerund
pW0,1,2	wh-PP extraction{position}
W0,1,2	wh-NP extraction{position}
X	ECM (eXceptional case marking)

Numbers are assigned according to the position of the argument in the declarative tree, as follows:

0	subject position
1	first argument (e.g. direct object)
2	second argument (e.g. indirect object)

The body of the name consists of a string of the following components, which corresponds to the leaves of the tree. The anchor(s) of the trees is(are) indicated by capitalizing the part of speech corresponding to the anchor.

s	sentence
a	adjective
arb	adverb
be	be
c	relative complementizer
x	phrasal category
d	determiner
v	verb
lv	light verb
conj	conjunction
comp	complementizer
it	it
n	noun
p	preposition
to	to
pl	particle
by	by
neg	negation

As an example, the transitive declarative tree consists of a subject NP, followed by a verb (which is the anchor), followed by the object NP. This translates into nx0Vnx1. If the subject NP had been extracted, then the tree would be W0nx0Vnx1. A passive tree with the by phrase in the same tree family would be nx1Vbynx0. Note that even though the object NP has moved to the subject position, it retains the object encoding (nx1).