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Schema Evolution
- Schema Evolution (3)
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... 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
... and then produces a transformer that can update data in a database to correspond to a newer version of the schema.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
... 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
... 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
... 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
... , 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
... 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