本文重点介绍了适合于时态数据库的时态关系代数。
It discuss the temporal relation algebra operations fit to temporal database.
结果证明时态关系代数运算与传统关系代数运算是相容的。
The conclusion is that the algebra operations of temporal relation and traditional relation are similituded.
最后，用时态映射定义的元组对双时态关系进行定义，并由此给出双时态关系代数运算的形式化描述。
Finally, bitemporal relation is defined as the set of the temporal mapping tuple, and the bitemporal relational algebra operations are described formally.
最后，用时态映射定义的元组对双时态关系进行定义，并由此给出双时态关系代数运算的形式化描述。
Finally, bitemporal relation is defined as the set of the temporal mapping tuple, and the bitemporal relational algebra operations are described formally.
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