Temporal Data Exchange
Temporal Data Exchange
复制标题
时态数据交换
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
W. Tan
中科院分区：
文献类型：
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作者：
Ladan Golshanara;J. Chomicki;W. Tan
在这项工作中，我们研究了时态数据的数据交换。有两种与时态数据相关的视图：具体时态视图，描述了时态数据是如何被复杂地表示的，以及实现的基础;抽象时态视图，定义了时态数据的语义。基于关系数据交换的基本工具chase过程，提出了两种新的chase过程：抽象时态视图的抽象chase过程和具体时态视图的具体chase过程。虽然标记空值对于关系数据交换已经足够了，但是它们必须在时态数据交换中进行细化，以保持具体追逐产生的结果与抽象追逐的结果之间的联系。我们表明，具体的追逐尊重的语义定义的抽象追逐，并提供了一个基础，查询回答
In this work, we study data exchange for temporal data. There are two views associated with temporal data: the concrete temporal view, which depicts how temporal data is compactly represented and on which implementations are based, and the abstract temporal view, which defines the semantics of temporal data. Based on the chase procedure, which is a fundamental tool in relational data exchange, two new kinds of chase are proposed in this paper: the abstract chase for the abstract temporal view and the concrete chase for the concrete temporal view. While labeled nulls are sufficient for relational data exchange, they have to be refined in temporal data exchange to keep the connection between the result produced by the concrete chase and the result of the abstract chase. We show that the concrete chase respects the semantics defined by the abstract chase and provides a foundation for query answering