A temporal database model using nested relations
نویسنده
چکیده
................................................................................................................................................................3 ACKNOWLEDGMENTS ......................................................................................................................................10
منابع مشابه
Querying Nested Historical Relations in Heterogeneous Databases Environment
We study schema integration problems for consolidating historical information from nested relational databases in heterogeneous databases environment. These nested relations are for supporting complex objects. In heterogeneous databases systems, probabilistic partial values have been used to resolve some schema integration problems. In this paper, we extend the concept of probabilistic partial ...
متن کاملNF-NR: A practical normal form for nested relations
We propose a normal form for nested relations, called NF-NR, which removes undesirable anomalies from a nested relational database schema. Both functional dependencies and multivalued dependencies are considered. NF-NR reduces to 3NF/4NF if the nested relation considered is actually a flat relation. Especially, NF-NR removes global redundancies among a set of nested relations. Two approaches to...
متن کاملMaintaining Semi-structured Spatio-Temporal Data Based on Nesting-Relation-Oriented Model
semi-structured spatio-Temporal data has become prevalent with growth of GIS. In this paper, we propose to use “Nested” natural of spatio-Temporal data to storing & maintaining it efficiently in an Object-Relational Database based on Nesting-Relation-Oriented data Model– one of N1NF database. This model not only reflects the nested structure of semi-structured spatio-Temporal data, but also dis...
متن کاملNormalization of Single Level Nested Structure in Object-Relational Data Model
Object-Relational Data Model (ORM) has included various Object-Oriented (OO) conceptual implementations in a relational environment. One of the advances is the inclusion of ROW type feature to facilitate nested relation structure. In this paper, we propose a new normalization technique for relations with single nested structure using ROW type attribute. In our best knowledge, there is no work o...
متن کاملTemporal Reasoning in Nested Temporal Networks with Alternatives
Temporal networks play a crucial role in modeling temporal relations in planning and scheduling applications. Temporal Networks with Alternatives (TNAs) were proposed to model alternative and parallel processes in production scheduling, however the problem of deciding which nodes can be consistently included in such networks is NP-complete. A tractable subclass, called Nested TNAs, can still co...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2004