Database sampling is commonly used in applications like data mining and approximate query evaluation in order to achieve a compromise between the accuracy of the results and the computational cost of the process. The authors have recently proposed the ...
Recently, a lot of approaches and systems were proposed to store the ontology-based data to the relational database. In this paper, we present a novel approach to store the ontology-based data with integrity constraints. Integrity constraint (IC) is a ...
We present an efficient implementation method for temporal integrity constraints formulated in Past Temporal Logic. Although the constraints can refer to past states of the database, their checking does not require that the entire database history be ...
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