Journal ArticleDOI
Federated database systems for managing distributed, heterogeneous, and autonomous databases
Amit P. Sheth,James A. Larson +1 more
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In this paper, the authors define a reference architecture for distributed database management systems from system and schema viewpoints and show how various FDBS architectures can be developed, and define a methodology for developing one of the popular architectures of an FDBS.Abstract:
A federated database system (FDBS) is a collection of cooperating database systems that are autonomous and possibly heterogeneous. In this paper, we define a reference architecture for distributed database management systems from system and schema viewpoints and show how various FDBS architectures can be developed. We then define a methodology for developing one of the popular architectures of an FDBS. Finally, we discuss critical issues related to developing and operating an FDBS.read more
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A survey of approaches to automatic schema matching
Erhard Rahm,Philip A. Bernstein +1 more
TL;DR: A taxonomy is presented that distinguishes between schema-level and instance-level, element- level and structure- level, and language-based and constraint-based matchers and is intended to be useful when comparing different approaches to schema matching, when developing a new match algorithm, and when implementing a schema matching component.
Journal ArticleDOI
Federated Machine Learning: Concept and Applications
TL;DR: This work introduces a comprehensive secure federated-learning framework, which includes horizontal federated learning, vertical federatedLearning, and federated transfer learning, and provides a comprehensive survey of existing works on this subject.
Journal ArticleDOI
Data fusion
Jens Bleiholder,Felix Naumann +1 more
TL;DR: This article places data fusion into the greater context of data integration, precisely defines the goals of data fusion, namely, complete, concise, and consistent data, and highlights the challenges of data Fusion.
Journal ArticleDOI
Query evaluation techniques for large databases
TL;DR: This survey describes a wide array of practical query evaluation techniques for both relational and postrelational database systems, including iterative execution of complex query evaluation plans, the duality of sort- and hash-based set-matching algorithms, types of parallel query execution and their implementation, and special operators for emerging database application domains.
Journal ArticleDOI
Ontology mapping: the state of the art
TL;DR: Ontology mapping is seen as a solution provider in today's landscape of ontology research as mentioned in this paper and provides a common layer from which several ontologies could be accessed and hence could exchange information in semantically sound manners.
References
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Journal ArticleDOI
An intermediate database language and its rule-based transformation to different database languages
G. Piatetsky-Shapiro,G. Jakobson +1 more
TL;DR: This work describes the intermediate database language GTE DELPHI, which combines the power of relational algebra with practically important database operations, including output to a file, grouping, aggregate computations, and nested queries, and indicates how a conversion program can be generated from examples.
Proceedings ArticleDOI
Local query translation and optimization in a distributed system
TL;DR: The optimization minimizes the number of disk accesses by taking advantage of the access paths available to the CODASYL local database management systems and the relationship information of the variables used in the relational commands.
Proceedings Article
UNIBASE - An Integrated Access to Databases
TL;DR: The relational model is established as a common view of different databases as well as a formula language used for the definition of query, assertion, constraint, and transformation rules.
Journal ArticleDOI
Granting and revoking discretionary authority
TL;DR: A range of strategies for automatic authority revocation is presented, each of which supports a different degree of automatic revocation of authority from subordinates, and may be applied to organizational structures with distributed authority.