Query processing is one of the key techniques in HIIS, and query decomposition,scheduling and optimization are the central problems for query processing.
查询处理是异构信息集成系统的关键技术之一,查询分解、查询调度和查询优化是查询处理的核心内容。
参考来源 - 异构信息集成中的查询处理与优化研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Query decomposition focused mainly on the FLWR expressions.
查询分解主要侧重于FLWR表达式。
The paper introduces the steps of query process, gives the particular way of the query decomposition, and also analyses the query optimize method.
介绍了查询处理的步骤，给出了查询分解的具体方法，并对查询的优化问题进行研究分析。
Query processing is one of the key techniques in HIIS, and query decomposition, scheduling and optimization are the central problems for query processing.
查询优化是异构信息集成系统中非常重要而又十分复杂的问题。
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