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Computational Grammars can be adapted to detect ungrammatical sentences, effectively transforming them into error detection (or correction) systems. In this paper we provide a theoretical account of how to adapt implemented HPSG grammars for grammatical error detection. We discuss how a single ungrammatical input can be reconstructed in multiple ways and, in turn, be used to provide specific, high-quality feedback to language learners. We then move on to exemplify this with a few of the most common error classes made by learners of Mandarin Chinese. We conclude with some notes concerning the adaptation and implementation of the methods described here in ZHONG, an open-source HPSG grammar for Mandarin Chinese.
Development of maximally reusable grammars: Parallel development of Hebrew and Arabic grammars
(2015)
We show how linguistic grammars of two different yet related languages can be developed and implemented in parallel, with language-independent fragments serving as shared resources, and language-specific ones defined separately for each language. The two grammars in the focus of this paper are of Modern Hebrew and Modern Standard Arabic, and the basic infrastructure, or core, of the grammars is based on "standard" HPSG. We identify four types of relations that exist between the grammars of two languages and demonstrate how the different types of relations can be implemented in parallel grammars with maximally shared resources. The examples pertain to the grammars of Modern Hebrew and Modern Standard Arabic, yet similar issues and considerations are applicable to other pairs of languages that have some degree of similarity.
The aim of this paper is to give a unified account of the way that German demonstrative pronouns (henceforth: D-pronouns) like der, die and das behave (a) in sentences where they receive a coreferential interpretation, and (b) in sentences where they receive a covarying interpretation because they are in some way dependent on a quantificational expression – either via direct binding or indirectly, because the value they receive varies with the value that is assigned to the variable bound by an indefinite determiner.
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.
I discuss the status of WH-words for interrogative interpretations, and show that the derivation of constituent questions evolves from a specific interplay of syntactic and semantic representations with pragmatics. I argue that WH-pronouns are not ‘interrogative’. Rather, they are underspecified elements; due to this underspecification, WH-words can form a constitutive part not only of interrogative, but also of exclamative and declarative clauses. WH-words introduce a variable of a particular conceptual domain into the semantic representation. Accordingly, they have to be specified for interpretation. Different WH-contexts give rise to different interpretations. In a cross-linguistic overview, I discuss the characteristic elements contributing to the derivation of interrogatives. I argue that specific particles or their phonologically empty counterparts in the head of CP contribute the interrogative aspect. The speech act of ‘asking’ is then carried out via an intonational contour that identifies a question. By default, this intonational contour operates on interrogative sentences; however, other sentence formats – in particular, those of declarative sentences – are possible as well. The distinction of (a) grammatical (syntactic, semantic and phonological) sentence formats for interrogative and declarative sentences, and (b) intonational contours serving the discrimination of speech acts like questions and assertions, can be related to psychological and neurological evidence.