Objektorientierte Schema-evolution Seminar " Schema Evolution " (ws 05/06) Objektorientierte Schema-evolution Inhaltsverzeichnis
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Conceptual XML Schema Evolution - the CoDEX Approach for Design and Redesign
Most available approaches for XML schema evolution specify the evolution steps for an XML schema or a DTD. This article will show that schema evolution can also be realized on a conceptual model. Schema evolution always requires propagating the changes to the XML documents that are already associated to the schema. This article suggests a method for conceptual schema evolution concerning all th...
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Data Warehouse systems aim at integrating data from multiple heterogeneous, distributed, autonomous data sources. Due to changing business needs the data warehouse systems are never meant to be static. Changes in the data source structure or business requirements would result in the evolution of data warehouse schema structure. When data warehouse schema evolves the dependent modules such as it...
متن کاملArchitecture for Dynamic Schema Evolution in Heterogeneous Database Environments: A Prototype System and Its Evaluation
Dynamic schema evolution is the process of evolving a database schema by incorporating changes in a timely manner, without loss of existing data, and without significantly affecting the day-to-day operations of the database. Systems that manage schema evolution are described in the literature, but address schema evolution single, stand-alone, object-oriented databases. Organizations typically u...
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When an (accounting) database schema does not meet the requirements of a fmn, the schema must be changed. Such schema evolution can be considered as realizable via a sequence of operators. This research proceeds in the following three steps. First, we define a set of basic evolution schema operators and employ the evolution heuristics to guide the evolution process. Second, we explore how domai...
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Data warehouse is considered as the core component of the modern decision support systems. Due to the major support of data warehouse in the daily transaction of an enterprise, the requirements for the design and the implementation of DW are dynamic and subjective. This dynamic nature of the data warehouse may reflect the evolution in the data warehouse. Data warehouse evolution may be focused ...
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تاریخ انتشار 2006