Title: E-Metadata versioning system for data warehouse schema

Authors: Vinay Gautam; N. Parimala

Addresses: School of Computer and Systems Sciences, Jawaharlal Nehru University, New Delhi 110067, India ' School of Computer and Systems Sciences, Jawaharlal Nehru University, New Delhi 110067, India

Abstract: In our proposal, E-Metadata is a combination of the technical metadata and the ontology. Whenever the data warehouse schema is modified, the changes are reflected in the technical metadata. As a consequence, a new version of E-Metadata has to be created. The E-Metadata versioning system proposed in this study creates the new version. The version creation process uses three steps to create the different versions of the E-Metadata. First, the changes in the technical metadata schema are identified. Towards this, we propose XSD-Diff algorithm which generates the difference between two XML schemas (technical metadata). It generates the Delta file which contains the information that has changed. Second, the changed information in the Delta file is used to incorporate the changes in the ontology. Third, the version information dictionary is updated reflecting the new version of E-Metadata.

Keywords: data warehousing; metadata versioning; ontology; e-metadata; electronic metadata.

DOI: 10.1504/IJMSO.2012.050015

International Journal of Metadata, Semantics and Ontologies, 2012 Vol.7 No.2, pp.101 - 113

Received: 29 Dec 2011
Accepted: 27 Feb 2012
Published online: 31 Dec 2014 *

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