Refereed Publications
- Yukiko Sasaki Alam, “Lexicon Divided According
to the Division of Labor,” in Zygmunt Vetulani (ed.),
Human Language Technologies as a Challenge for Computer
Science and Linguistics, Wydawnictwo Poznanskie Sp.
z. o.o., Poznan, Poland, pp. 134-138. 2005. (ISBN 83-7177-341-2)
Abstract - Focus of
the current research is on the lexicon in natural language
processing. The structure and contents of the lexicon
are a vital issue to be addressed, yet much explicit discussion
on them as a whole is not out. This paper proposes a model
that performs morphological, syntactic and semantic analyses
by using three levels of lexicons. The first level of
lexicon is for morphological analysis, and lists the strings
of the morphemes of a language, the morphological properties
and the syntactic categories, whereas the second level
is for syntactic analysis, and consists of several dictionaries
divided according to the syntactic categories and subcategories.
Each of the second level of dictionaries provides information
on the meanings of words. Verbs are listed in syntactically
subcategorized dictionaries such as a dictionary for NP/V/VCOMPP
or NP/V/SCOMPP and a dictionary for NP/V/NP. The third
level of lexicon is a semantic lexicon, indexed with unique
meanings, and furnished with information on the semantic
classes of the meanings, so that each meaning could attain
more information relating to the class from the table
of semantic classes. The third level of semantic lexicon
is intended for all languages. For a comprehensive view
of the model, the present paper elaborates a step-by-step
process of parsing an English sentence in interaction
with the relevant dictionaries.
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