Schema Evolution publication categorizer

... 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

... 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

... 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

... 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

... 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