Dealing with conjunctions in a machine translation environment
EACL '83 Proceedings of the first conference on European chapter of the Association for Computational Linguistics
A flexible natural language parser based on a two-level representation of syntax
EACL '83 Proceedings of the first conference on European chapter of the Association for Computational Linguistics
An improved heuristic for ellipsis processing
ACL '82 Proceedings of the 20th annual meeting on Association for Computational Linguistics
Building non-normative systems: the search for robustness an overview
ACL '82 Proceedings of the 20th annual meeting on Association for Computational Linguistics
Scruffy text understanding: design and implementation of 'tolerant' understanders
ACL '82 Proceedings of the 20th annual meeting on Association for Computational Linguistics
Language As a Cognitive Process: Syntax
Language As a Cognitive Process: Syntax
Surface-marker-based dialog modelling: A progress report on the MAREDI project
Natural Language Engineering
Analysis of conjunctions in a rule-based parser
ACL '85 Proceedings of the 23rd annual meeting on Association for Computational Linguistics
Syntactic normalization of spontaneous speech
COLING '90 Proceedings of the 13th conference on Computational linguistics - Volume 3
A logical formalism for the representation of determiners
COLING '86 Proceedings of the 11th coference on Computational linguistics
Weighted interaction of syntax and semantics in natural language analysis
IJCAI'85 Proceedings of the 9th international joint conference on Artificial intelligence - Volume 2
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The paper discusses three different kinds of syntactic ill-formedness: ellipsis, conjunctions, and actual syntactic errors. It is shown how a new grammatical formalism, based on a two-level representation of the syntactic knowledge is used to cope with ill-formed sentences. The basic control structure of the parser is briefly sketched; the paper shows that it can be applied without any substantial change both to correct and to ill-formed sentences. This is achieved by introducing a mechanism for the hypothesization of syntactic structures, which is largely independent of the rules defining the well-formedness. On the contrary, the second level of syntactic knowledge embodies those rules and is used to validate the hypotheses emitted by the first level. Alternative hypotheses are obtained, when needed, by means of local reorganizations of the parse tree. Sentence fragments are handled by the same mechanism, but in this case the second level rules are used to detect the absence of one (or more) constituents.