【摘要】 本文提出一种新的异构数据查询技术,该技术可以有效地对异构数据进行统一查询,从而避免了传统数据集成中语义转换的问题,提高了查询效率,在理论和实践中具有广泛的应用价值。更多还原

【Abstract】 The paper presents a new query technology of heterogeneous data source which will query efficiently in order to avoid time-cost semantic transformatio n. It has been proved to be valuable not only in the theory aspect but also in t he application field.更多还原