By Ion Androutsopoulos
Advances in temporal databases make it more and more more uncomplicated to shop time-dependent details, making a want for amenities that would aid end-users entry this knowledge. within the context of normal language interplay, major attempt has been dedicated to interfaces that let database queries to be formulated in normal language. lots of the latest interfaces, in spite of the fact that, don't aid properly the thought of time. Drawing upon annoying and element theories, temporal logics, and temporal databases, this cross-discipline booklet examines suitable concerns from the 3 parts, constructing a unified theoretical framework that may be used to construct average language interfaces to temporal databases. The framework good points an HPSG mapping from English to a officially outlined which means illustration language, and a corresponding mapping to a temporal extension of the SQL database language. The e-book is observed via a freely on hand prototype interface, outfitted in accordance with the framework, and carried out utilizing Prolog and ALE. this can be the 1st in-depth exploration of the thought of time in common language database interfaces. it will likely be fairly attention-grabbing to researchers engaged on typical language interplay, stressful and element, HPSG, temporal logics, and temporal databases, in particular those that desire to know about time-related matters in different disciplines.
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Extra resources for Exploring Time, Tense and Aspect in Natural Language Database Interfaces (Natural Language Processing)
83) is that J. Adams is still a manager. (An alternative reading is that J. 84) carries no implication that J. Adams is still a manager; in fact, it seems to imply that he is no longer a manager. 83) J. Adams has been a manager for two years. 84) J. Adams was a manager for two years. 84). Present perfect and temporal adverbials. The present perfect does not combine felicitously with some temporal adverbials. 89) instead. 90) are acceptable. 90) *Which flights have landed yesterday? Which flights landed yesterday?
63), this could be the covering of a short remaining distance up to the gate. The progressive is then taken to assert that the preparatory process was in progress. 63) At 5:00 pm BA737 was reaching gate 2. In other cases, an iterative reading may be employed in order to add duration to the situation of the verb. 64), for example, the most natural reading is that John is banging his hand repeatedly. 64) John is banging his hand on the table. Figuring out, however, exactly which preparatory process should be attached to an instantaneous situation, or exactly when an iterative reading is licensed is a difficult task for an nlitdb.
Hence, for the purposes of this book, it seems reasonable to assume that punctual adverbials combining with states always have interjacent meanings. 112) J. Adams left Edinburgh early in the morning, and at 8:10 am he was in Glasgow. 113) Who was in Glasgow at 8:10 am? Punctual adverbials with points. 115). 5). 114) Which flight entered sector 2 at 23:02? 115) Which flight reached gate 5 at 23:02? 116) is ambiguous. It may involve the non-habitual homonym of to depart, which is a point verb in the airport domain; in that case, 5:00 pm is the time of the actual departure.