International Journal of Information Systems and Management
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International Journal of Information Systems and Management (2 papers in press)
Bi-temporal Versioning of Changing Measures in Bitemporal Data Warehouses 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.
A Proposed Ontological Model for Preparing an Egyptian Public Budget by Soha Ahmed, Shimaa Ouf, Mahmoud Abd Ellatif, Yehia Helmy Abstract: The Egyptian public sector environment is still suffering from the lack of reliance on the technology resources, in the application of complex financial processes, like the budget process which still prepared using the traditional way. The traditional way is paper-based, has lack of technical aspect, consume time and need a high volume of workers to be done, Which results to unreal budget estimation. Ontology is defined as a shared understanding of a domain that could help to store, retrieve, share, and reuse knowledge of a domain in an effective way. This paper is going to apply the ontology which considered the backbone of the semantic web. It is used to enhance the integrity, transparency, reliability, and accuracy of Egyptian public budget. In this paper, ontology is used for the first time to build a budget ontological model to represent the public budget structure for the Egyptian public sector domain and make quality budget knowledge more accessible and usable. Keywords: Egyptian Public Budget; Ontology; Budget Ontology; Financial Ontology; Business Ontology; Software Architecture; Semantic Web.