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Wyświetlanie 1-2 z 2
Tytuł:
Implementing semantic frames as typed feature structures with XMG
Autorzy:
Lichte, T.
Petitjean, S.
Powiązania:
https://bibliotekanauki.pl/articles/103937.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Instytut Podstaw Informatyki PAN
Tematy:
metagrammar
typed feature structures
models of type constraints
type hierarchy
unification
Opis:
This work1 presents results on the integration of frame-based representations into the framework of eXtensible MetaGrammar (XMG). Originally XMG allowed for the description of tree-based syntactic structures and underspecified representations of predicate-logical formulae, but the representation of frames as a sort of typed feature structure, particularly type unification, was not supported. Therefore, we introduce an extension that is capable of handling frame representations directly by means of a novel -dimension. The aim is not only to make possible a straightforward specification of frame descriptions, but also to offer various ways to specify constraints on types, be it as a connected type hierarchy or a loose set of feature structure constraints. The presented extensions to XMG are fully operational in a new prototype.
Źródło:
Journal of Language Modelling; 2015, 3, 1; 185-228
2299-856X
2299-8470
Pojawia się w:
Journal of Language Modelling
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Syntax-driven semantic frame composition in Lexicalized Tree Adjoining Grammars
Autorzy:
Kallmeyer, L.
Osswald, R.
Powiązania:
https://bibliotekanauki.pl/articles/103941.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Podstaw Informatyki PAN
Tematy:
lexicalized tree adjoining grammars
syntax-semantics interface
decompositional frame semantics
elementary constructions
metagrammar
feature structures
dative alternation
directed motion expressions
Opis:
The grammar framework presented in this paper combines Lexicalized Tree Adjoining Grammar (LTAG) with a (de)compositional frame semantics. We introduce elementary constructions as pairs of elementary LTAG trees and decompositional frames. The linking between syntax and semantics can largely be captured by such construction since in LTAG, elementary trees represent full argument projections. Substitution and adjunction in the syntax then trigger the unification of the associated semantic frames, which are formally defined as base-labelled feature structures. Moreover, the system of elementary constructions is specified in a metagrammar by means of tree and frame descriptions. This metagrammatical factorization gives rise to a fine-grained decomposition of the semantic contributions of syntactic building blocks, and it allows us to separate lexical from constructional contributions and to carve out generalizations across constructions. In the second half of the paper, we apply the framework to the analysis of directed motion expressions and of the dative alternation in English, two well known examples of the interaction between lexical and constructional meaning.
Źródło:
Journal of Language Modelling; 2013, 1, 2; 267-330
2299-856X
2299-8470
Pojawia się w:
Journal of Language Modelling
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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