tailieunhanh - Báo cáo khoa học: "Bilingual Hebrew-English Generation of Possessives and Partitives: Raising the Input Abstraction Level"

Syntactic realization grammars have traditionally attempted to accept inputs with the highest possible level of abstraction, in order to facilitate the work of the components (sentence planner) preparing the input. Recently, the search for higher abstraction has been, however, challenged (E1hadad and Robin, 1996)(Lavoie and Rambow, 1997)(Busemann and Horacek, 1998). | Bilingual Hebrew-English Generation of Possessives and Partitives Raising the Input Abstraction Level Yael Dahan Netzer and Michael Elhadad Ben Gurion University Department of Mathematics and Computer Science Beer Sheva 84105 Israel yaelnIelhadad @ Abstract Syntactic realization grammars have traditionally attempted to accept inputs with the highest possible level of abstraction in order to facilitate the work of the components sentence planner preparing the input. Recently the search for higher abstraction has been however challenged El-hadad and Robin 1996 Lavoie and Rambow 1997 Busemann and Horacek 1998 . In this paper we contribute to the issue of selecting the ideal abstraction level in the input to syntactic realization grammar by considering the case of partitives and pos-sessives in a bilingual Hebrew-English generation grammar. In the case of bilingual generation the ultimate goal is to provide a single input structure where only the openclass lexical entries are specific to the language. In that case the minimal abstraction required must cover the different syntactic constraints of the two languages. We present a contrastive analysis of the syntactic realizations of possessives and partitives in Hebrew and English and conclude by presenting an input specification for complex NPs which is slightly more abstract than the one used in SURGE. We define two main features - possessor and ref-set and discuss how the grammar handles complex syntactic co-occurrence phenomena based on this input. We conclude by evaluating how the resulting input specification language is appropriate for both languages. 1 Introduction One of the first issues to address when selecting a syntactic realization component is whether its input specification language fits the desired application. Traditionally syntactic realization components have attempted to raise the abstraction level of input specifications for two reasons 1 to preserve the possibility of paraphrasing and 2

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