Temporal specialization and generalization
نویسندگان
چکیده
منابع مشابه
Temporal Specialization and Generalization
A standard relation is two-dimensional with attributes and tuples as dimensions. A temporal relation contains two additional, orthogonal time dimensions, namely valid time and transaction time. Valid time records when facts are true in the modeled reality, and transaction time records when facts are stored in the temporal relation. While, in general, there are no restrictions between the valid ...
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متن کاملTemporal specialization and generalization - Knowledge and Data Engineering, IEEE Transactions on
A standard relation has two dimensions: attributes and tuples. A temporal relation contains two additional orthogonal time dimensions, namely, valid time and transaction time. Valid time records when facts are true in the modeled reality, and transaction time records when facts are stored in the temporal relation. Although, in general, there are no restrictions between the valid time and transa...
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ژورنال
عنوان ژورنال: IEEE Transactions on Knowledge and Data Engineering
سال: 1994
ISSN: 1041-4347
DOI: 10.1109/69.334885