Titlebook: Deductive and Object-Oriented Databases; Second International C. Delobel,M. Kifer,Y. Masunaga Conference proceedings 1991 Springer-Verlag B

outrage

A comparison between deductive and object-oriented database systems,ments. We close with an examination of the prospects for “classless” data, which is motivated by the prospect of databases where the number of distinct classes would be too large to name systematically. There are a number of challenges to implementing such facilities in either paradigm, and we propose some appropriate research questions.

insincerity

是突襲

ALOFT

Vertebra

Genome

Institutionen?konomik, Effizienz und Machts and algebra are equivalent, and both support expressive set-based and nondeterministic updates. Finally, we introduce a formal notion of answers of updates with respect to a database, and develop a sound and complete algorithm for update evaluation.

冥界三河

BORE

農(nóng)學(xué)

G-Log: A declarative graphical query language,procedural” way. Furthermore, it provides an intuitive and flexible graphical tool for non-expert database users. We prove that G-Log is a graphical equivalent of the first order predicate calculus. Finally, we study its features as a non-deterministic language and compare it with other existing non-deterministic languages.

Blazon

Syntactic characterizations of 1-bounded Datalog programs,e both uniform 1-boundedness for single-rule programs and 1-boundedness for two-rule programs, when the programs belong to certain classes studied previously for the problem of boundedness. In addition, we provide an exact characterization for 1-boundedness of two-rule programs in which no EDB predicate is repeated in the recursive rule.