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Japanese is often taken to be strictly head-final in its syntax. In our work on a broad-coverage, precision implemented HPSG for Japanese, we have found that while this is generally true, there are nonetheless a few minor exceptions to the broad trend. In this paper, we describe the grammar engineering project, present the exceptions we have found, and conclude that this kind of phenomenon motivates on the one hand the HPSG type hierarchical approach which allows for the statement of both broad generalizations and exceptions to those generalizations and on the other hand the usefulness of grammar engineering as a means of testing linguistic hypotheses.
We present a broad coverage Japanese grammar written in the HPSG formalism with MRS semantics. The grammar is created for use in real world applications, such that robustness and performance issues play an important role. It is connected to a POS tagging and word segmentation tool. This grammar is being developed in a multilingual context, requiring MRS structures that are easily comparable across languages.
Based on a detailed case study of parallel grammar development distributed across two sites, we review some of the requirements for regression testing in grammar engineering, summarize our approach to systematic competence and performance profiling, and discuss our experience with grammar development for a commercial application. If possible, the workshop presentation will be organized around a software demonstration.
We explore the interaction of sentential negation and word order in Basque using a small experimental implemented grammar based on the Grammar Matrix (Bender et al., 2002, 2010) to test the analyses. We find that the analysis of free word order (Fokkens, 2010) provided by the Grammar Matrix customization system can be adapted to handle the Basque facts, and that the constructional approach taken in that analysis supports the integration of negation.
While the sortal constraints associated with Japanese numeral classifiers are well-studied, less attention has been paid to the details of their syntax. We describe an analysis implemented within a broad-coverage HPSG that handles an intricate set of numeral classifier construction types and compositionally relates each to an appropriate semantic representation, using Minimal Recursion Semantics.
While the sortal constraints associated with Japanese numeral classifiers are wellstudied, less attention has been paid to the details of their syntax. We describe an analysis implemented within a broadcoverage HPSG that handles an intricate set of numeral classifier construction types and compositionally relates each to an appropriate semantic representation, using Minimal Recursion Semantics.
This paper hypothesizes that transfer-based machine translation systems can be improved by encoding information structure in both the source and target grammars, and preserving information structure in the transfer stage. We explore how information structure can be represented within the HPSG/MRS formalism (Pollard and Sag, 1994; Copestake et al., 2005) and how it can help refine multilingual MT. Building upon that framework, we provide a sample translation between English and Japanese and check the feasibility of the proposals in small-scale translation systems built with the HPSG/MRS-based LOGON MT infrastructure (Oepen et al., 2007). Our experiment shows the information structure-based MT system that we propose in this paper reduces the number of translations 75.71% for Japanese and 80.23% for Korean. The dramatic reductions in the number of translations is expected to make a contribution to our HPSG/MRS-based MT in terms of latency as well as accuracy.
Japanese is often taken to be strictly head-final in its syntax. In our work on a broad-coverage, precision implemented HPSG for Japanese, we have found that while this is generally true, there are nonetheless a few minor exceptions to the broad trend. In this paper, we describe the grammar engineering project, present the exceptions we have found, and conclude that this kind of phenomenon motivates on the one hand the HPSG type hierarchical approach which allows for the statement of both broad generalizations and exceptions to those generalizations and on the other hand the usefulness of grammar engineering as a means of testing linguistic hypotheses.
Case is traditionally approached as a lexical phenomenon in HPSG. The LinGO Grammar Matrix customization system, an HPSG-based grammar engineering toolkit and also a typological meta-resource, includes several options for case assignment, and one of them, 'focus case', assumes that case of the participants in basic clauses is handled via lexical rules rather than lexical entries. This phenomenon was previously only attributed to a group of Austronesian languages, and thus the focus case differed from all other case options in the Matrix which were attested for across language families. Our analysis of Kolyma Yukaghir, a nearly extinct language of North-Eastern Russia, shows that focus case can be successfully used outside of Austronesian family and therefore that the option is more universal than it was previously thought.
We address three properties of Turkish morphology and VP coordination: the identification of tense and aspect values across conjuncts, the optional omission of affixes on non-final conjuncts coordinated with the word ve and the obligatory sharing of scopal modals across conjuncts in coordination structures with the affix -ip. For the modals in an -ip structure, we propose an analysis that uses syntactic features to trigger the application of a construction at the level of the coordinated VP introducing the scopal predications. Our analysis is implemented in a small HPSG grammar and tested against datasets confirming the functionality and consistency of the analysis.