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62
Generation and Synchronous TreeAdjoining Grammars
, 1990
"... Treeadjoining grammars (TAG) have been proposed as a formalism for generation based on the intuition that the extended domain of syntactic locality that TAGs provide should aid in localizing semantic dependencies as well, in turn serving as an aid to generation from semantic representations. We dem ..."
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Cited by 635 (39 self)
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Treeadjoining grammars (TAG) have been proposed as a formalism for generation based on the intuition that the extended domain of syntactic locality that TAGs provide should aid in localizing semantic dependencies as well, in turn serving as an aid to generation from semantic representations. We demonstrate that this intuition can be made concrete by using the formalism of synchronous treeadjoining grammars. The use of synchronous TAGs for generation provides solutions to several problems with previous approaches to TAG generation. Furthermore, the semantic monotonicity requirement previously advocated for generation gram mars as a computational aid is seen to be an inherent property of synchronous TAGs.
Characterizing Structural Descriptions Produced By Various Grammatical Formalisms
 IN PROCEEDINGS OF THE 25TH ANNUAL MEETING OF THE ASSOCIATION FOR COMPUTATIONAL LINGUISTICS
, 1987
"... We consider the structural descriptions produced by various grammatical formalisms in terms of the complexity of the paths and the relationship between paths in the sets of structural descriptions that each system can generate. In considering the relationship between formalisms, we show that it is u ..."
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Cited by 80 (9 self)
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We consider the structural descriptions produced by various grammatical formalisms in terms of the complexity of the paths and the relationship between paths in the sets of structural descriptions that each system can generate. In considering the relationship between formalisms, we show that it is useful to abstract away from the details of the formalism, and examln the nature of their derivation process as reflected by properties of their derivation trees. We find that several of the formalisms considered can be seen as being closely related since they have derivation ee sets with the same structure as those produced by ContextFree Grammars. On the basis of this observation, we describe a class of formalisms which we call Linear Context Free Rewritin Systems, and show they are recognizable in polynomial time and generate only semilinear languages.
The Equivalence Of Four Extensions Of ContextFree Grammars
 Mathematical Systems Theory
, 1994
"... There is currently considerable interest among computational linguists in grammatical formalisms with highly restricted generative power. This paper concerns the relationship between the class of string languages generated by several such formalisms viz. Combinatory Categorial Grammars, Head Grammar ..."
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Cited by 79 (5 self)
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There is currently considerable interest among computational linguists in grammatical formalisms with highly restricted generative power. This paper concerns the relationship between the class of string languages generated by several such formalisms viz. Combinatory Categorial Grammars, Head Grammars, Linear Indexed Grammars and Tree Adjoining Grammars. Each of these formalisms is known to generate a larger class of languages than ContextFree Grammars. The four formalisms under consideration were developed independently and appear superficially to be quite different from one another. The result presented in this paper is that all four of the formalisms under consideration generate exactly the same class of string languages. 1 Introduction There is currently considerable interest among computational linguists in grammatical formalisms with highly restricted generative power. This is based on the argument that a grammar formalism should not merely be viewed as a notation, but as part o...
The Computational Analysis of the Syntax and Interpretation of "Free" Word Order in Turkish
, 1995
"... ..."
Parsing Some Constrained Grammar Formalisms
 Computational Linguistics
, 1994
"... this paper we present a scheme to extend a recognition algorithm for ContextFree Grammars (CFG) that can be used to derive polynomialtime recognition algorithms for a set of formalisms that generate a superset of languages generated by CFG. We describe the scheme by developing a CockeKasamiYoung ..."
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Cited by 56 (6 self)
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this paper we present a scheme to extend a recognition algorithm for ContextFree Grammars (CFG) that can be used to derive polynomialtime recognition algorithms for a set of formalisms that generate a superset of languages generated by CFG. We describe the scheme by developing a CockeKasamiYounger (CKY)like pure bottomup recognition algorithm for Linear Indexed Grammars and show how it can be adapted to give algorithms for Tree Adjoining Grammars and Combinatory Categorial Grammars. This is the only polynomialtime recognition algorithm for Combinatory Categorial Grammars that we are aware of
String Variable Grammar: A Logic Grammar Formalism For The Biological Language Of DNA
, 1993
"... this paper, we present a generalized form of SVG, which supports additional biologicallyrelevant operations by going beyond homomorphisms, instead uniformly applying substitutions in either a forward or reverse direction (see Definition 2.1) to bindings of logic variables. We give a constructive pr ..."
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Cited by 43 (2 self)
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this paper, we present a generalized form of SVG, which supports additional biologicallyrelevant operations by going beyond homomorphisms, instead uniformly applying substitutions in either a forward or reverse direction (see Definition 2.1) to bindings of logic variables. We give a constructive proof of our conjecture [26] that the languages describable by SVG are contained in the indexed languages, and furthermore show that the containment is proper, thus refining the position of an important class of biological sequences in the hierarchy of languages. We also describe a simple grammar translator, give a number of examples of mathematical and biological languages, discuss the distinctions between SVG, DG, TAG, and RPDAs, and suggest extensions wellsuited to the overlapping languages of genes. Finally, we describe a largescale implementation of a domainspecific parser called GenLang which incorporates a practical version of these ideas, and which has been successful in parsing several types of genes from DNA sequence data [9, 30], in a form of patternmatching search termed syntactic pattern recognition [10]. 6 2. STRING VARIABLE GRAMMAR
Grammatical Acquisition: Inductive Bias and Coevolution of Language and the Language Acquisition Device
 Language
, 2000
"... An account of grammatical acquisition is developed within the parametersetting framework applied to a generalized categorial grammar (GCG). The GCG is embedded in a default inheritance network yielding a natural partial ordering (reflecting generality) of parameters which determines a partial ord ..."
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Cited by 39 (0 self)
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An account of grammatical acquisition is developed within the parametersetting framework applied to a generalized categorial grammar (GCG). The GCG is embedded in a default inheritance network yielding a natural partial ordering (reflecting generality) of parameters which determines a partial order for parameter setting. Computational simulation shows that several resulting acquisition procedures are effective on a parameter set expressing major typological distinctions based on constituent order, and defining 70 distinct full languages and over 200 subset languages. The effects on acquisition of inductive bias, that is, of differing initial parameter settings, are explored via computational simulation. Computational simulation of populations of language learners and users instantiating the acquisition model show: 1) that variant acquisition procedures, with differing inductive biases, exert differing selective pressures on the evolution of language(s); 2) acquisition proc...
The acquisition and use of contextdependent grammars for English
 Computational Linguistics
, 1993
"... This paper introduces a paradigm of contextdependent grammar (CDG) and an acquisition system that, through interactive teaching sessions, accumulates the CDG rules. The resulting contextsensitive rules are used by a stackbased, shift~reduce parser to compute unambiguous syntactic structures of se ..."
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Cited by 37 (0 self)
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This paper introduces a paradigm of contextdependent grammar (CDG) and an acquisition system that, through interactive teaching sessions, accumulates the CDG rules. The resulting contextsensitive rules are used by a stackbased, shift~reduce parser to compute unambiguous syntactic structures of sentences. The acquisition system and parser have been applied to the phrase structure and case analyses of 345 sentences, mainly from newswire stories, with 99 % accuracy. Extrapolation from our current grammar predicts that about 25 thousand CDG rule examples will be sufficient to train the system in phrase structure analysis of most news stories. Overall, this research concludes that CDG is a computationally and conceptually tractable approach for the construction of sentence grammar for large subsets of natural language text. 1.