Abstract
Various applications require storing and handling data at different granularities due to the nature of the data, diverse data origins, and resource-constraint specifications. The work in this paper introduces domain schemas, which extend the concept of domain to consider different granularities and the relationships among them. Relying on this definition, we introduce a multi-granular database model and its integrity constraints and query language. In particular, we extend traditional and conditional dependency constraints to deal with data at different granularities and study the satisfiability and consistency problems associated with them. The query language corresponds to SQL extended with operators specifically design to deal with granularities. As a case study, we focus on the spatial and temporal domains, which have extensive use in the literature and highlight the notion of granularity.
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Bravo, L., Rodríguez, M.A. (2014). A Multi-granular Database Model. In: Beierle, C., Meghini, C. (eds) Foundations of Information and Knowledge Systems. FoIKS 2014. Lecture Notes in Computer Science, vol 8367. Springer, Cham. https://doi.org/10.1007/978-3-319-04939-7_17
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DOI: https://doi.org/10.1007/978-3-319-04939-7_17
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