Combining dependent annotations for relational algebra
Combining dependent annotations for relational algebra
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组合关系代数的依赖注释
DOI：
10.1145/2274576.2274597
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
P. Buneman
中科院分区：
文献类型：
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作者：
Egor V. Kostylev;P. Buneman
注释是添加到现有数据库中的某种形式的数据。它可以是由于某种原因无法存储在原始数据库中的附加数据，也可以是某种形式的元数据，例如通常不被视为基本数据库设计的一部分的注释、概率、时间戳。最近有人观察到，为了确定注释应该如何通过数据库查询传播，我们需要对它们进行某种结构化处理。尽管已经详细考虑了各种形式的注释，但每种形式都是单独考虑的。
在本文中，我们考虑会发生什么情况时，不同形式的注释相结合。我们表明，有许多情况下，注释，出于很自然的原因，相互依赖。什么是适当的结构放置在这样的注释？我们提供了一种方法，结合不同的形式，并提供了一个正常的形式，这是有用的，在决定是否两个或两个以上的组合注释是等效的。
Annotation is some form of data that is added to an existing database. It could be additional data that for whatever reason cannot be stored in the original database, or it could be some form of metadata such as comments, probabilities, timestamps that are not normally regarded part of the basic database design. It has recently been observed that, in order to determine how annotations should be propagated through database queries, we need to have some structure on them. Although various forms of annotation have been considered in some detail, each form has been considered in isolation.
In this paper we consider what happens when different forms of annotation are combined. We show that there are many cases in which annotations, for quite natural reasons, depend on one another. What is the appropriate structure to place on such annotations? We provide a method for combining different forms and provide a normal form which is useful in deciding whether two or more combined annotations are equivalent.
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影响因子：
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作者：
Buneman P
通讯作者：
Buneman P