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Institute
In this paper we investigate German idioms which contain phraseologically fixed clauses (PCl). To provide a comprehensive HPSG theory of PCls we extend the idiom theory of Soehn 2006 in such a way that it can distinguish different degrees of regularity in idiomatic expressions. An in-depth analysis of two characteristic PCls shows how our two-dimensional theory of idiomatic expressions can be applied and illustrates the scope of the theory.
The result of questionnaire studies are presented which shows (i) that conjuncts are scope islands in Japanese and (ii) that left-node raising can nullify such scope islands. This finding confirms the theory advanced in Yatabe (2001), in which semantic composition is almost entirely carried out within order domains, and arguably contradicts the theory proposed in Beavers and Sag (2004), which introduces a mechanism called Optional Quantifier Merger to deal with the fact that right-node raising and left-node raising can have semantic effects.
The so-called floating quantifier constructions in languages like Korean display intriguing properties whose successful processing can prove the robustness of a parsing system. This paper shows that a constraint-based analysis, in particular couched upon the framework of HPSG, can offer us an efficient way of analyzing these constructions together with proper semantic representations. It also shows how the analysis has been successfully implemented in the LKB (Linguistic Knowledge Building) system.
In this paper I suggest an interface level of semantic representations, that on the one hand corresponds to morpho-syntactic entities such as phrase structure rules, function words and inflections, and that on the other hand can be mapped to lexical semantic representations that one ultimately needs in order to give good predictions about argument frames of lexical items. This interface level consists of basic constructions that can be decomposed into five sub-constructions (arg1-role, arg2-role ... arg5-role). I argue in favour of phrasal constructions in order to account for altering argument frames and maybe also coercion without having to use lexical rules or multiple lexical entries.
This paper provides a background on the role of world knowledge in disambiguating modals and proposes treating the disambiguation of counterfactuals as a slightly more tractable sub-case of the general problem. Using a model theoretic possible worlds approach, counterfactuals are disambiguated with respect to a world of evaluation resembling classic Formal Semantic treatments (e.g., Kratzer 1977, 1981, 1989; Lewis 1973; Veltman 2005). The world, which provides a context of evaluation, is located through the interaction of the antecedent and consequent propositions with world knowledge axioms. This approach to modal disambiguation provides a connection between a grammar and the type of inferences typically handled in Knowledge Representation Systems (e.g., Hobbs et al. 1990) in a limited domain. The model theoretic semantics are linked with typed feature structures in an HPSG syntax (Pollard and Sag 1994). This grammar is implemented in TRALE, Penn's (2004) Prolog-based framework for typed feature structure grammar development. The compositional semantics in TRALE is specified in Penn and Richters' (2004, 2005) Constraint Language for Lexical Resource Semantics (CLLRS). This semantic component provides a semantic parse in which heads and arguments are combined systematically and the scope of negation or quantification can be accurately reflected. In the case of counterfactuals, the CLLRS semantic parse is passed to a model-theoretic interpreter. The mapping between the CLLRS semantic parse and the well-formed formulas of the model is defined by checking the parseability of the formula in the compositional semantics. Sets of possible worlds interact with constraints on world knowledge and constraints defining counterfactual validity. The truth value for a counterfactual is returned to the grammar relative to a context of evaluation. The results of counterfactual evaluation are returned in a form consistent with the grammar's internal compositional semantics. By the method described above, the interpreter provides a grammar-external component in which inferences involving world knowledge have the potential to be more efficiently evaluated. Through the development of model-checking techniques, for instance, it could be shown whether or not well-formed formulas and constraints hold in larger models and move towards capturing more fine-grained modal inferences in a larger domain.
We propose a formulation of 'relative tense theory' as applied to the complex tenses in Japanese using an HPSG grammar with its semantics represented based on Discourse Representation Theory. Specifically, a mechanism of tense interpretation which consecutively combines Discourse Representation Structures in parallel with an otherwise motivated hierarchical syntactic structure is presented. The framework provides a concise and comprehensive account of the Japanese simplex and complex tenses; it is made possible by the use of a hypothetical temporal point temporal axis, which relates the location time of the relevant clause to an outer temporal point, and a modal semantic operator woll.
Focusing on the examples of multiple degree modification, this paper argues that the class of degree expressions in English is syntactically and semantically diverse, subdivided both according to the semantic effects of its members and according to the extent to which they permit, and participate in, multiple layers of modification. We argue that these two factors are linked, and result in (at least) a three-way distinction between ˋtrue degree morphemes', which map gradable adjectives to properties of individuals and combine with their arguments in a Head-Specifier structure; ˋintensifiers', which are syntactic and semantic modifiers of properties constructed out of gradable adjectives; and ˋscale modifiers', which are also syntactic and semantic modifiers, but which combine with ˋbare' gradable adjectives (relations between individuals and degrees) rather than properties formed out of gradable adjectives.
A compound matrix
(2004)
This paper presents a suplement to the Grammar Matrix, namely what I call a Compound Matrix ; in reality, it is not a matrix, since the type file includes a fully specified cross-linguistic inventory of compound types. The idea is that the grammar writer can comment out the ungrammatical types for his or her own language. The theory behind the typology is presented here in a bottom-up fashion, from the basic assumptions to the actual linguistic types.
This paper summarizes the architecture of Lexical Resource Semantics (LRS). It demonstrates how to encode the language of two-sorted theory (Ty2; Gallin, 1975) in typed feature logic (TFL), and then presents a formal constraint language that can be used to extend conventional description logics for TFL to make direct reference to Ty2 terms. A reduction of this extension to Constraint Handling Rules (CHR; Fruehwirth & Abdennadher, 1997) for the purposes of implementation is also presented.
Recent analyses of mismatches at the syntax-semantics interface investigate e.g. modification of agentive nouns (Larson, 1998), modification of quantifying pronouns (Abney, 1987), or recursive modification (Kasper, to appear). Each of these analyses is tailored to a specific set of data, and it is not immediately obvious how they could be generalised to cover a larger set of data. I propose a unified analysis for these mismatches that attempts to bring out their common ground. This analysis shares some of its basic intuitions with the one of Kasper, but is more general because the mismatches are handled locally in the CONT feature. Its pivot is an elaborate syntax-semantics interface that is based on a surface-oriented syntactic analysis. This analysis generalises easily to the mismatches at the morphology-semantics interface for German separable-prefix verbs that were discussed in (Müller, 2003).