Key And Key Attributes Set, Non-Key Attributes Set with Translation of Block Schemes

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Trinh Dinh Thang


The report proposes and demonstrates some properties of key and the sets of primitive, non primitive attributes with the translation of block scheme. The relationship between the key of block and the key of slice through the translation, the results of key through the translation... From the properties have been demonstrated, which more clearly shows the key structure of the block scheme in the particular case of data model for block form.

Keywords: key, non-key, block schemes, attributes


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