A Relational Model for the Possibilistic Valid-time Approach
نویسندگان
چکیده
منابع مشابه
A Relational Model for the Possibilistic Valid-time Approach
In real world, it is very common that some objects or concepts have properties with a time-variant or timerelated nature. Modelling this kind of objects or concepts in a (relational) database schema is possible, but time-variant and time-related attributes have an impact on the consistency of the entire database and must be appropriately managed. Therefore, temporal database models have been pr...
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Information in databases can be imperfect and this imperfection has several forms and causes. In some cases, a single value should be stored, but it is (partially) unknown. The uncertainty about which value to store leads to the aforementioned imperfection. In temporal databases, uncertainty can arise, concerning which temporal notion needs to be stored. Because in temporal databases, temporal ...
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A temporal database schema models objects or concepts with time-related or time-variant properties and a derived database contains measurements or descriptions concerning these temporal properties. The modelling of temporal information in a temporal database has an impact on the consistency of the database. Of course, this temporal information can be queried. In some cases, information in the q...
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ژورنال
عنوان ژورنال: International Journal of Computational Intelligence Systems
سال: 2012
ISSN: 1875-6891,1875-6883
DOI: 10.1080/18756891.2012.747662