Implementing mapping composition
نویسندگان
چکیده
منابع مشابه
Implementing Mapping Composition ( Extended Technical Report )
Mapping composition is a fundamental operation in metadata driven applications. Given a mapping over schemas σ1, σ2, and σ3, the composition problem is to find an equivalent mapping over only σ1 and σ3. We describe a new composition algorithm that targets practical applications. It incorporates view unfolding. It eliminates as many σ2 symbols as possible, even if not all can be eliminated. It c...
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Constraint propagation is a general algorithmic approach for pruning the search space of a constraint satisfaction problem. In a uniform way, K. R. Apt [1] has defined computation as an iteration of reduction functions over a domain. In [2], he has also demonstrated the need for integrating static properties of reduction functions (commutativity and semi-commutativity) to design specialized alg...
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Schema mappings and data mappings constitute essential building blocks of data integration, data exchange and peer-to-peer data sharing systems. At present, either schema-level mappings or datalevel mappings are used for data sharing purposes. In this paper we consider the semantics of bi-level mapping that combines the schema-level and data-level mappings. Tabular representation of the mapping...
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Mappings between different representations of data are the essential building blocks for many information integration tasks. A schema mapping is a high-level specification of the relationship between two schemas, and represents a useful abstraction that specifies how the data from a source format can be transformed into a target format. The development of schema mappings is laborious and time-c...
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There is an increasing need to interconnect biomedical ontologies. We investigate a simple but promising approach to generate mappings between ontologies by reusing and composing existing mappings across intermediate ontologies. Such an approach is especially promising for highly interconnected ontologies such as in the life science domain. There may be many ontologies that can be used for comp...
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ژورنال
عنوان ژورنال: The VLDB Journal
سال: 2007
ISSN: 1066-8888,0949-877X
DOI: 10.1007/s00778-007-0059-9