Lexicalized Tree-Adjoining Grammars (LTAG) - ad-teaching.infor...
Lexicalized Tree-Adjoining Grammars (LTAG) - ad-teaching.infor...
Lexicalized Tree-Adjoining Grammars (LTAG) - ad-teaching.infor...
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Auxiliary <strong>Tree</strong>s<br />
Definition (Auxiliary <strong>Tree</strong>)<br />
An auxiliary tree has the same properties as an initial tree apart<br />
from one exception:<br />
Example<br />
Exactly one of the leaves labeled by a non-terminal is marked<br />
as the foot node (indicated by the symbol “∗”) inste<strong>ad</strong> of<br />
being marked for substitution. The label of the foot node<br />
must be identical to the label of the root node.<br />
N<br />
A<br />
S<br />
S<br />
A<br />
N ∗<br />
Adv<br />
A ∗<br />
Adv<br />
S ∗<br />
NP↓<br />
VP<br />
green<br />
very<br />
yesterday<br />
V<br />
S<br />
thinks<br />
Comp<br />
that<br />
S ∗<br />
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