We examine the issue of how to measure the degree to which a functional dependency (FD)
is approximate. The primary motivation lies in the fact that approximate FDs represent …

This paper introduces possibilistic functional dependencies. These dependencies are
associated with a particular possibility distribution over possible worlds of a classical …

Similarity search and related issues are current topic in databases. Over the last ten years
more then 6500 papers dealing with similarity in databases were published according to …

摘要模式匹配是模式集成, 数据仓库, 电子商务以及语义查询等领域中的一个难点.
它主要利用元素自身信息(如元素名, 数据类型等信息), 数据实例信息(模式中的数据) …

Approximate functional dependencies (AFDs) are functional dependencies (FDs) that"
almost" hold in a relation. While various measures have been proposed to quantify the level …

A common practice of human learning and knowledge management is to use general rules,
exception rules, and exceptions to rules. One of the crucial issues is to find a right mixture of …

ABSTRACT Approximate Functional Dependencies (AFD) mined from database relations
represent potentially interesting patterns and have proven to be useful for various tasks like …

We study the representation, derivation and utilization of a special kind of constraints in
multidatabase systems. A major challenge is when component database schemas are …

结构信息是模式匹配的重要辅助信息, 当模式中出现多个自身信息相似的元素时,
结构信息是正确区分其匹配关系最有效的依据, 这在匹配大型模式时显得尤为重要 …

摘要各应用领域信息量爆炸性地增长带来了大量的劣质数据. 数据质量低劣经常导致灾难性后果
, 极大地限制了数据的正常使用. 数据的劣质性概括性地表现为数据的不一致性, 不准确性 …