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On The Use Of Negation In Boolean Ir Queries

机译:论布尔否定查询中否定的使用

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摘要

The negation operator, in various forms in which it appears in Information Retrieval queries, is investigated. The applications include negated terms in Boolean queries, more specifically in the presence of metrical constraints, but also negated characters used in the definition of extended keywords by means of regular expressions. Exact definitions are suggested and their usefulness is shown on several examples. Finally, some implementation issues are discussed, in particular as to the order in which the terms of long queries, with or without negated keywords, should be processed, and efficient heuristics for choosing a good order are suggested.
机译:否定运算符以各种形式出现在Information Retrieval查询中。这些应用程序包括布尔查询中的否定项(更具体地讲,在存在度量约束的情况下),还包括通过正则表达式定义扩展关键字时使用的否定字符。提出了确切的定义,并在几个示例中显示了它们的有用性。最后,讨论了一些实现问题,尤其是关于长查询条件(带有或不带有否定关键字)的处理顺序,并提出了选择良好顺序的有效启发式方法。

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