Search: in, TODS / VLDBJ

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EXPRESS: A Data EXtraction, PRocessing, and REStructuring System

... for accessing source data. The restructuring specified in CONVERT is compiled into a set of customized PL/l procedures to derive ... requests. The architecture of EXPRESS allows efficiency in execution by avoiding unnecessary secondary storage references while at the ...

Publication - erhard - 04/17/2013 - 10:16 - 0 comments - 0 attachments

A Model for Compound Type Changes Encountered in Schema Evolution

... and then produces a transformer that can update data in a database to correspond to a newer version of the schema. (no paper ...

Publication - erhard - 04/17/2013 - 10:05 - 0 comments - 1 attachment

Update Semantics of Relational Views

... A database view is a portion of the data structured in a way suitable to a specific on views must be translated into updates on the underlying database. This translation process in the relational model. The procedure is as follows: first, a “complete” ...

Publication - erhard - 04/17/2013 - 09:38 - 0 comments - 0 attachments

An Axiomatic Model of Dynamic Schema Evolution in Objectbase Systems

... model is proposed for dynamic schema evolution (DSE) in objectbase systems (OBSs) that supports the fundamental concepts of ...

Publication - erhard - 04/17/2013 - 08:49 - 0 comments - 0 attachments

A Survey of Approaches to Automatic Schema Matching

... 191.63 KB Schema matching is a basic problem in many database application domains, such as data integration, Ebusiness, data warehousing, and semantic query processing. In current implementations, schema matching is typically performed manually, ...

Publication - cat - 04/16/2013 - 22:16 - 0 comments - 1 attachment

Composing Schema Mappings: Second-Order Dependencies to the Rescue

... effect as applying successively the two schema mappings. In this paper, we give a rigorous semantics to the composition of schema ... We first study the important case of schema mappings in which the specification is given by a finite set of source-to-target ...

Publication - cat - 04/16/2013 - 19:16 - 0 comments - 1 attachment

Relational languages for metadata integration

... 676.21 KB In this article, we develop a relational algebra for metadata integration, ... where the number of relations and/or the number of columns in relations of the output varies dynamically with the input instance. Among ... generalized dynamic output schemas, where the values in any (fixed) number of input columns can determine output schemas.Further ...

Publication - cat - 04/16/2013 - 18:27 - 0 comments - 1 attachment

On the computation of relational view complements

... parts of a given data collection play an important role in many database applications. In dynamic environments where data is updated, not only information provided by ...

Publication - cat - 04/16/2013 - 18:16 - 0 comments - 1 attachment

Schema Mediation for Large-Scale Semantic Data Sharing

... tools should be well suited for exchanging information in a semantically meaningful way. Unfortunately, they suffer from two ... easily extensible data management architecture in which any user can contribute new data, schema information, or even mappings ... paper considers the problem of schema mediation in a PDMS. Our first contribution is a flexible language for mediating between ...

Publication - admin - 04/16/2013 - 17:27 - 0 comments - 1 attachment

Semantic and schematic similarities between database objects: a context-based approach

... 266.26 KB In a multidatabase system, schematic conflicts between two objects are ... content at the federation level are modeled as changes in the context and the associated schema correspondences. We try to reconcile ...

Publication - admin - 04/16/2013 - 13:27 - 0 comments - 1 attachment

A framework for modeling and evaluating automatic semantic reconciliation

... , new tools for automating the process were proposed.In this work we present a formal model of semantic reconciliation and analyze in a systematic manner the properties of the process outcome, primarily the ...

Publication - admin - 04/16/2013 - 13:16 - 0 comments - 1 attachment

Automatic integration of Web search interfaces with WISE-Integrator

... engines selling similar products is of great importance in allowing users to search and compare products from multiple sites with ease. ... which is inefficient and difficult to maintain. In this paper, we present WISE-Integrator – a tool that performs automatic ...

Publication - cat - 04/16/2013 - 07:27 - 0 comments - 0 attachments