Representing and querying histories of semistructured databases using multidimensional OEM

Stavrakas, Y; Gergatsoulis, M; Doulkeridis, C; Zafeiris, V

dc.contributor.author	Stavrakas, Y	en
dc.contributor.author	Gergatsoulis, M	en
dc.contributor.author	Doulkeridis, C	en
dc.contributor.author	Zafeiris, V	en
dc.date.accessioned	2014-03-01T02:42:57Z
dc.date.available	2014-03-01T02:42:57Z
dc.date.issued	2004	en
dc.identifier.issn	0306-4379	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/31148
dc.subject	Context-dependent data	en
dc.subject	Histories of semistructured databases	en
dc.subject	Multidimensional OEM	en
dc.subject	Multidimensional semistructured data	en
dc.subject	Querying semistructured database histories	en
dc.subject.classification	Computer Science, Information Systems	en
dc.subject.other	Graph theory	en
dc.subject.other	Mapping	en
dc.subject.other	Problem solving	en
dc.subject.other	Query languages	en
dc.subject.other	Software prototyping	en
dc.subject.other	World Wide Web	en
dc.subject.other	Context-dependent data	en
dc.subject.other	Histories of semistructured databases	en
dc.subject.other	Multidimensional OEM	en
dc.subject.other	Multidimensional semistructured data	en
dc.subject.other	Querying semistructured database histories	en
dc.subject.other	Database systems	en
dc.title	Representing and querying histories of semistructured databases using multidimensional OEM	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1016/j.is.2003.10.005	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.is.2003.10.005	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	Multidimensional semistructured data (MSSD) are semistructured data that present different facets under different contexts. Context represents alternative worlds, and is expressed by assigning values to a set of user-defined variables called dimensions. The notion of context has been incorporated in the object exchange model (OEM), and the extended model is called Multidimensional OEM (MOEM), a graph model for MSSD. In this paper, we explain in detail how MOEM can represent the history of an OEM database. We discuss how MOEM properties are applied in the case of representing OEM histories, and show that temporal OEM snapshots can be obtained from MOEM. We present a system that implements the proposed ideas, and we use an example scenario to demonstrate how an underlying MOEM database accommodates changes in an OEM database. Furthermore, we show that MOEM is capable to model changes occurring not only in OEM databases, but in Multidimensional OEM databases as well. The use of multidimensional query language (MQL), a query language for MSSD, is proposed for querying the history of OEM databases and MOEM databases. (C) 2003 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Information Systems	en
dc.identifier.doi	10.1016/j.is.2003.10.005	en
dc.identifier.isi	ISI:000220808000003	en
dc.identifier.volume	29	en
dc.identifier.issue	6	en
dc.identifier.spage	461	en
dc.identifier.epage	482	en