Forthcoming articles

International Journal of Information Systems and Management

International Journal of Information Systems and Management (IJISAM)

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International Journal of Information Systems and Management (1 paper in press)

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  • Bi-temporal Versioning of Changing Measures in Bitemporal Data Warehouses   Order a copy of this article
    by Anjana Gosain, Kriti Saroha 
    Abstract: Bi-temporal data warehouse (BTDW) design that extends the multidimensional model, uses bitemporal (combination of valid time and transaction time) timestamps on the members of multidimensional data in order to manage time-varying data. Various approaches to manage changes of schema and dimension data in BTDW exist that use the combination of both valid-time as well as transaction-time. Also, measures/ facts can undergo change with time However, current BTDWs do not handle or track changes for dynamic measures. This would pose problem for applications like fraud detection, where it is required to know and record the time when changes have occurred in the system; schema, dimension data or measures. Thus, the changes occurring in the measures need to be recorded indicating the time when a specific measure value is valid or updated. In this work, we propose solution for handling time-varying measures using bi-temporal versioning of fact table schema and fact data along with storage options for handling and storing the separate versions of fact table schema and data.
    Keywords: data warehouse; bi-temporal data warehouse; schema versioning; transaction-time; valid-time; bi-temporal; facts; measures.