By Palmira Marrafa, Patrick Saint-Dizier (auth.), Tomek Strzalkowski (eds.)
Reversible grammar permits computational types to be equipped which are both well matched for the research and new release of traditional language utterances. This job might be seen from very assorted views via theoretical and computational linguists, and machine scientists. The papers during this quantity current a large variety of methods to reversible, bi-directional, and non-directional grammar structures that experience emerged lately. this can be additionally the 1st assortment solely dedicated to the issues of reversibility in typical language processing.
such a lot papers accrued during this quantity are derived from displays at a workshop held on the collage of California at Berkeley in the summertime of 1991 organised below the auspices of the organization for Computational Linguistics.
This e-book should be a worthwhile connection with researchers in linguistics and computing device technological know-how with pursuits in computational linguistics, ordinary language processing, and computing device translation, in addition to in useful elements of computability.
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Extra info for Reversible Grammar in Natural Language Processing
On H defined by: rTI ( X ) def == X [; Tl V X [; T2 V ... V x [; Tk V ... We say that rj. is the operational semantics of the main predicate specialization T, relative to interpreter intpr. l' of P, for Keeping the same notations as above, consider now the denotational semantics 1'( x) of l' relative to P, and consider its specialization rT (x). (x). and to be complete iff: Soundness is a minimal requirement for an interpreter, and we will always assume it, but completeness is a requirement which is not always met in practice.
Our description language is, in the same time, well-adapted to deal with lexical-based approaches to language processing (those approaches like lexicon grammars where the lexicon plays a central role) and to describe representations developed within lexical semantics. Finally, a constraint like pending generalises the notion of long-distance dependency to several other kinds of dependencies. This generalization is in particular a consequence of the fact that type structures do not have any ordering on subtypes and they cannot, thus, directly express the difference between remote and close constituents.
The variables which are used by active constraints are thus global variables. 9 CONCLUSION We have first defined a formalism based on types and active constraints of the Logic Programming framework and have shown that it is well-appropriate to describe language constructions. We have in particular illustrated it by focussing on secondary predications and small clauses, two important phenomena in language processing. Finally, we have shown that our formalism is particularly appropriate to be used by a parser and by a generator, in a symmetric way, and we have defined for that prupose two abstract machines.
Reversible Grammar in Natural Language Processing by Palmira Marrafa, Patrick Saint-Dizier (auth.), Tomek Strzalkowski (eds.)