Title :
Representing imprecise information in NF2 relations
Author_Institution :
Dept. of Comput. Sci., Tulane Univ., New Orleans, LA, USA
Abstract :
A model which can represent imprecise information and store it as an extension of normal-form (NF2) relations with one level of nesting is proposed. It is shown by example that the model is more general than the ordinary NF2 relational model. This generality is accomplished by an operator that can manipulate imprecise data and precise data and can have the same properties as the nest and the pack operators defined for NF2 relations. This operator, called the merge operator, is defined. A representation framework for representing incomplete data, including range values and various null values, is also proposed
Keywords :
database theory; relational databases; NF2 relational model; NF2 relations; imprecise information; incomplete data; merge operator; nesting; null values; range values; representation framework; Algebra; Data models; Databases; Noise measurement;
Conference_Titel :
Southeastcon '90. Proceedings., IEEE
Conference_Location :
New Orleans, LA
DOI :
10.1109/SECON.1990.117976
