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Developing a model and a language to identify and specify the integrity constraints in spatial datacubes
| Content Provider | Semantic Scholar |
|---|---|
| Author | Salehi, Mehrdad |
| Copyright Year | 2009 |
| Abstract | Data quality in spatial datacubes is an important topic, since these databases are used as a basis for decision making in large organizations dealing with health care, environmental management, and transportation, to name only a few. Indeed, po or quality data in these datacubes may lead to poor decisions, which may eventually have significant social and economic impacts. Integrity constraints play a key role in improving logical consistency, one of the major elements of data quality. More precisely, integrity constraints are assertions typically defined in the conceptual model of a database application in order to prevent the insertion of incorrect data into the database. A number of models for spatial datacubes have been proposed in the recent years. However, none of these models explicitly includes integrity constraints. Consequently, integrity constraints of spatial datacubes are treated in non-systematic and pragmatic ways that make the process of verifying data consistency in spatial datacubes cumbersome and inefficient. This thesis provides a framework for the identification and specification of integrity constraints for spatial datacubes. To achieve this, we first propose a formaI model for spatial datacubes. This model describes the different components of spatial datacubes at both the schema and instance levels. Based on thismodel , we identify and categorize different types of integrity constraints in spatial datacubes. These integrity constraints include both traditional integrity constraints (in the context of spatial datacubes) and cube-specific integrity constraints. In addition, since spatial datacubes typically involve both spatial and temporal data, we propose a formaI classification for the integrity constraints of databases dealing with space and time. At the end, we present a formaI language for the specification of integrity constraints in the conceptual model of spatial datacubes. This language is based on controlled natural languages as weIl as natural hybrid languages with pictograms. Several examples ofintegrity constraints of spatial datacubes are defined using this language. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://corpus.ulaval.ca/jspui/bitstream/20.500.11794/20953/1/26325.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
