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EXPRESS: A Data EXtraction, PRocessing, and REStructuring System

... prototype data translation system which can access a wide variety of data and restructure it for new uses. The system is driven ... presented. The DEFINE description is compiled into a customized PL/l program for accessing source data. The restructuring ...

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

A Model for Compound Type Changes Encountered in Schema Evolution

... 420.56 KB Schema evolution is a problem that is faced by long-lived data. When a schema changes, existing persistent data can become inaccessible unless the ... the database maintainer can perform. We have developed a model of type changes involving multiple types. The model describes both type ...

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

Update Semantics of Relational Views

... 100 - 499 A database view is a portion of the data structured in a way suitable to a specific on views ...

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

An Axiomatic Model of Dynamic Schema Evolution in Objectbase Systems

... 50 - 99 A sound and complete axiomatic model is proposed for dynamic schema evolution ... an OBS. The inference mechanism performed by the model has a proven termination. (object-oriented, Theory, TODS / VLDBJ) ...

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

Comment on Bancilhon and Spyratos' "Update semantics and relational views"

... Keller, A.M. Author:  Keller, A Year:  ...

Publication - huliganka - 04/17/2013 - 00:16 - 0 comments - 1 attachment

On the computation of relational view complements

... range:  n/a Attachment Size ... 311.36 KB Views as a means to describe parts of a given data collection play an important role in many database applications. ...

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