Compilation of a dictionary of japanese functional expressions with hierarchical organization

Authors:
Suguru Matsuyoshi;Satoshi Sato;Takehito Utsuro
Affiliations:
Graduate School of Engineering, Nagoya University, Chikusa, Nagoya, Japan;Graduate School of Engineering, Nagoya University, Chikusa, Nagoya, Japan;Graduate School of Systems and Information Engineering, University of Tsukuba, Tennodai, Tsukuba, Japan
Venue:
ICCPOL'06 Proceedings of the 21st international conference on Computer Processing of Oriental Languages: beyond the orient: the research challenges ahead
Year:
2006

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Abstract

The Japanese language has a lot of functional expressions, which consist of more than one word and behave like a single functional word. A remarkable characteristic of Japanese functional expressions is that each functional expression has many different surface forms. This paper proposes a methodology for compilation of a dictionary of Japanese functional expressions with hierarchical organization. We use a hierarchy with nine abstraction levels: the root node is a dummy node that governs all entries; a node in the first level is a headword in the dictionary; a leaf node corresponds to a surface form of a functional expression. Two or more lists of functional expressions can be integrated into this hierarchy. This hierarchy also provides a way of systematic generation of all different surface forms. We have compiled the dictionary with 292 headwords and 13,958 surface forms, which covers almost all of major functional expressions.