Kambayashi, Y., Tanaka, K. and Takeda,K., Synthesis of Unnormalized Relations Incorporating more meaning, Information Sciences, 1983. Home/Search Document Not in Database Summary Related Articles Check |
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A New Normal Form for Nested Relations - Ozsoyoglu, Yuan (1987) (32 citations) (Correct)
....relations, and defines a normal form by incorporating extended dependencies into 4NF definition. In [Mak] however, a method to obtain a database scheme in this normal form is not given. Utilizing non first normal form relations for structuring database outputs is discussed by Kambayashi et al. [KTT]. Fischer and Gucht study one level nested relations and their characterization by a new family of dependencies [FG] Roth, Korth and Silberschatz define a normal form called Partitioned Normal Form for nested relations [RKS] Recently, several researchers have reported query languages for ....
....to show the properties of keys and conflict free MVDs later in the paper. Lemma 2.4 [BFMY] If M is a conflict free set of MVDs, then M satisfies intersection property. 2. 3 Nested Relations, Scheme Trees Nested relations (or nonfirst normal form relations) are discussed by several researchers [AB, FG, JS, KTT, Mak, OO]. Informally, a nested relation is a relation whose tuple components are atomic values or repeating group instances. In this paper, we consider a special type of nested relations that are structured as a tree. Let U be a universal scheme, and T be a tree whose vertices are labeled by pairwise ....
Kambayashi, Y., Tanaka, K. and Takeda,K., Synthesis of Unnormalized Relations Incorporating more meaning, Information Sciences, 1983.
Handling Fuzzy Complex Objects In Knowledge-Based Systems - Turhan (1994) (Correct)
....representations of information may provide a more intuitive user view of data. 3. Non first normal form reduces the number of tuples and eliminates redundancy. 4. Related to the stated three reasons, querying is also simplified [41] The nested relational data model (Non first normal form) [2, 24, 35, 41, 46, 47, 48, 18, 28] was developed in order to extend the support for the complex objects in the relational data model. Nested relations can naturally represent the hierarchy of complex objects by allowing recursively defined relation valued attributes in addition to atomic attributes. We will give a more formal ....
Y. Kambayashi, K. Tanaka, and K. Takeda. Synthesis of Unnormalized Relations Incorporating More Meaning. Information Sciences Journal, 29:201--247, 1983.
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