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Tree Database
The Tree Database contains the tree templates that are
lexicalized by following the various steps given above. The lexical
items are inserted into distinguished nodes in the tree template
called the anchor nodes. The part of speech of each word in the
sentence corresponds to the label of the anchor node of the trees.
Hence the tagset used by the POS Tagger corresponds exactly to the
labels of the anchor nodes in the trees. The tagset used in the XTAG
system is given in Table 3.3. The tree templates are
subdivided into tree families (for verbs and other predicates), and
tree files which are simply collections of trees for lexical items
like prepositions, determiners, etc
3.2
.
XTAG Project
1998-09-14