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Temporal object oriented databases within information systems

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The result of the TOOBIS project consists in three different tools: the Temporal Object Oriented Methodology (TOOM), a temporal analysis and design methodology; the TOODBMS which supports both the valid and transaction time dimensions and is compatible with the ODMG standard; and ODL, a software module which adds ODMG-compatible object definition capabilities to the O2 system. The result is a Temporal Object Oriented Database Management System which aims to the development of object-oriented temporal applications by supporting the representation and querying of bitemporal data. The key technical achievements during the development of the O2 ODBMS extension are the conformance to existing ODMG and SQL3 standards, the provision of a formalization of basic temporal data types and operators for temporal objects, a language describing the temporal data which will be stored in an object database including temporal semantics and a high-level SQL-like language that will provide facilities for the retrieval of data from a temporal database. A conceptual modeling methodology based on O* and extending the UML method with temporal guidelines is provided to support the design of temporal applications. The result supports the database market and the new emerging area of data warehousing. The TOODBMS is designed to store large amounts of historical or reference data. Furthermore OLTP systems based on TOODBMS technology can provide powerful functions for data synthesis, analysis and consolidation which are operations falling in the area of multidimensional data analysis. Delta S.A., the largest fresh-products producer in Greece, is using the result to predict the next day milk consumption. Thus an optimal production and loading plan can be formed in order to minimize the expired milk products returned. Glaxo Wellcome, one of the biggest pharmaceutical companies, is using the result for the diagnosis and treatment of asthma by monitoring the evolution of symptoms of a patient as well as its therapeutical protocol. Using the result the expected benefits can be the formalization of temporal object-oriented data, efficient historical data management, data synthesis and analysis through temporal information retrieval. Project URL :

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