Due to ever demanding decisions that needs to be made right on time technologies that enhance decision making have evolved. These technologies have evolved to integrate heterogeneous information sources for analysis purposes. Transactional databases (Information sources) are progressively becoming autonomous and they change their content rapidly due to continuous transactions (data changes) and may change their structure due to continual users' requirements evolving (schema changes). Using such data sources for decision making becomes strenuous and nearly impossible. Governments all over the world are faced with challenging decision making which is the very livelihood to their very existence Download
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