By Gabriel G. Bes, Thierry Guillotin
This publication offers very important effects from the ESPRIT undertaking 393 "Construction and Interrogation of data Bases utilizing average Language textual content and photos" (ACORD). The venture concerned greater than fifty humans overfive years, and incorporated business and educational companions from 3 nations. the most results of the undertaking is a hugely refined human-machine interface permitting the development and interrogation of a typical wisdom base in English, French, and German, utilizing either normal language and pics. bankruptcy 1 offers an summary of the undertaking. Chapters 2-4 improve particular matters bearing on thegrammar versions used (functional grammars and unification categorial grammars). bankruptcy five discusses anaphora answer and bankruptcy 6 textual content new release. bankruptcy 7 explains the combination of textual content and images, and bankruptcy eight discusses the information base module. The contributions are theoretically orientated and strongly serious about generalization and the underlying heritage of capability additional advancements.
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Additional info for A Natural Language and Graphics Interface: Results and Perspectives from the ACORD Project
Unbounded dependencies are lexically handled, without using gap threading like in standard UCG or functional composition like in CCG (cf. Steedman (1986» or in FOP. Furthermore, some non local order constraints are accounted for without problem, like the distribution of negative particles, or the necessity for an inverted sentence (with a lexical NP subject on the right of the verb) to incorporate a wh-element on the left of the verb. 3 Conclusion In extending UCG to allow the treatment of unbounded dependency constructions and partially free word order, heavy use is made of unary rules (Wittenburg (1986), Calder et al.
2 Expressing the Variables Underlying Word Order Constraints In FG, there are no post and pre primitive values associated with specific verb valencies. Instead, features interact with combination rules to enforce the constraints on word order. ~cal NP can be subject or object. If it is subject and it is to the left of the verb, it cannot be immediately followed by a wh-constituent. If it is subject and it is placed to the right of the verb, it must be immediately adjacent to it. These constraints can be stated using unification along the following lines.
Tp E T) Boolean combinations of these primitive predicates will be called lexical predicates; they are denoted by <,', lp •••• We write <,'(x) or x E <,' if x is an element of the subset of E denoted by rp. 1\, V, - , - , ...... are the classical Boolean connectors (conjunction, disjunction, implication, equivalence, negation), V and 3 are the classical quantifiers. ( d) A set of lexical axioms of one of the following forms. e. 2 t/J(a) Example 1 E is a set of phonological representations of words or complex noun phrases.