Download Applications of Logic Databases by Oris Friesen, Gilles Gauthier-Villars (auth.), Raghu PDF

By Oris Friesen, Gilles Gauthier-Villars (auth.), Raghu Ramakrishnan (eds.)

The premise in the back of constructing robust declarative database languages is compelling: via permitting clients to specify their queries (and their integrity constraints) in a transparent, non-operational manner, they make the user's job more uncomplicated, and supply the database process with extra possibilities for optimization. Relational database platforms provide a awesome facts that this premise is certainly legitimate. the preferred relational question language, SQL, relies upon relational algebra and calculus, i.e., a small fragment of first-order common sense, and the convenience of writing queries in SQL (in comparability to extra navigational languages) has been an immense consider the industrial luck of relational databases. it really is recognized that SQL has a few vital barriers, regardless of its good fortune and recognition. significantly, the question language is non-recursive, and aid for integrity constraints is restricted. certainly, spotting those difficulties, the most recent common, SQL-92, offers elevated help for integrity constraints, and it really is expected that the successor to the SQL-92 general, referred to as SQL3, RECURSIVE UNION operation [1]. good judgment database structures have will comprise a focused on those extensions to the relational database paradigm, and a few structures (e.g., Bull's DEL prototype) have even included object-oriented gains (another extension more likely to look in SQL3).

Show description

Read or Download Applications of Logic Databases PDF

Best logic books

Ecological Ethics and Living Subjectivity in Hegel's Logic: The Middle Voice of Autopoietic Life

Via interweaving Hegelian dialectic and the center voice, this ebook develops a holistic account of lifestyles, nature, and the moral orientation of people with admire to them, with out falling into the seize of both subjecting human rights to totality or relegating non-human beings and their habitats to instrumentalism.

Rewriting Logic and Its Applications: 8th International Workshop, WRLA 2010, Held as a Satellite Event of ETAPS 2010, Paphos, Cyprus, March 20-21, 2010, Revised Selected Papers

This publication constitutes the refereed lawsuits of the eighth overseas Workshop on Rewriting good judgment and its functions, WRLA 2010, held as a satellite tv for pc occasion of ETAPS 2010, Paphos, Cyprus, in March 2010. The thirteen revised complete papers provided have been rigorously reviewed and chosen from 29 submissions. The papers are prepared in topical sections on termination and narrowing; instruments; the ok framework; purposes and semantics; maude version checking and debugging; and rewrite engines.

Domain Theory, Logic and Computation: Proceedings of the 2nd International Symposium on Domain Theory, Sichuan, China, October 2001

Domain names are mathematical constructions for info and approximation; they mix order-theoretic, logical, and topological principles and supply a normal framework for modelling and reasoning approximately computation. the speculation of domain names has proved to be a great tool for programming languages and different parts of desktop technology, and for functions in arithmetic.

Fields of Logic and Computation II: Essays Dedicated to Yuri Gurevich on the Occasion of His 75th Birthday

This Festschrift is released in honor of Yuri Gurevich's seventy fifth birthday. Yuri Gurevich has made basic contributions at the large spectrum of common sense and desktop technology, together with choice methods, the monadic idea of order, summary nation machines, formal tools, foundations of laptop technological know-how, protection, and masses extra.

Additional resources for Applications of Logic Databases

Sample text

The first two are expressed in LDL by the following: LocationRefIntegViolation(EntCode)

While managing the yard, placement rules must be applied. So, once some dangerous goods are stored in a slot, the surrounding slots must not contain goods of certain kinds. We consider the following scenario: (1) The manager decides to store a new container in a given slot and chooses a slot for the container. Is this decision acceptable, considering the applicable rules? (2) An accident occurs requiring the intervention of the fire brigade on a given container. Prior to any action, firemen will want to get all relevant information concerning dangerous goods stored near the accident.

Prolog for string matching: Advantages Another major sub-task in Q-Data was to determine whether two strings were duplicates of each other. A special kind of rule called a "soft string match" was needed which would match two strings even if there were misspellings, abbreviations, letter transpositions and/or different word order in the two strings. We found Prolog to be very suitable for this sub-task because: • The logic program for the "soft string match" naturally lends itself to a top down computation.

Download PDF sample

Rated 4.52 of 5 – based on 31 votes