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Logic Programming and Databases

Logic Programming and Databases PDF Author: Stefano Ceri
Publisher: Springer Science & Business Media
ISBN: 3642839525
Category : Computers
Languages : en
Pages : 284

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Book Description
The topic of logic programming and databases. has gained in creasing interest in recent years. Several events have marked the rapid evolution of this field: the selection, by the Japanese Fifth Generation Project, of Prolog and of the relational data model as the basis for the development of new machine archi tectures; the focusing of research in database theory on logic queries and on recursive query processing; and the pragmatic, application-oriented development of expert database systems and of knowledge-base systems. As a result, an enormous amount of work has been produced in the recent literature, coupled with the spontaneous growth of several advanced projects in this area. The goal of this book is to present a systematic overview of a rapidly evolving discipline, which is presently not described with the same approach in other books. We intend to introduce stu dents and researchers to this new discipline; thus we use a plain, tutorial style, and complement the description of algorithms with examples and exercises. We attempt to achieve a balance be tween theoretical foundations and technological issues; thus we present a careful introduction to the new language Datalog, but we also focus on the efficient interfacing of logic programming formalisms (such as Prolog and Datalog) with large databases.

Logic Programming and Databases

Logic Programming and Databases PDF Author: Stefano Ceri
Publisher: Springer Science & Business Media
ISBN: 3642839525
Category : Computers
Languages : en
Pages : 284

View

Book Description
The topic of logic programming and databases. has gained in creasing interest in recent years. Several events have marked the rapid evolution of this field: the selection, by the Japanese Fifth Generation Project, of Prolog and of the relational data model as the basis for the development of new machine archi tectures; the focusing of research in database theory on logic queries and on recursive query processing; and the pragmatic, application-oriented development of expert database systems and of knowledge-base systems. As a result, an enormous amount of work has been produced in the recent literature, coupled with the spontaneous growth of several advanced projects in this area. The goal of this book is to present a systematic overview of a rapidly evolving discipline, which is presently not described with the same approach in other books. We intend to introduce stu dents and researchers to this new discipline; thus we use a plain, tutorial style, and complement the description of algorithms with examples and exercises. We attempt to achieve a balance be tween theoretical foundations and technological issues; thus we present a careful introduction to the new language Datalog, but we also focus on the efficient interfacing of logic programming formalisms (such as Prolog and Datalog) with large databases.

Datalog and Logic Databases

Datalog and Logic Databases PDF Author: Sergio Greco
Publisher: Morgan & Claypool Publishers
ISBN: 1627051147
Category : Computers
Languages : en
Pages : 169

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Book Description
The use of logic in databases started in the late 1960s. In the early 1970s Codd formalized databases in terms of the relational calculus and the relational algebra. A major influence on the use of logic in databases was the development of the field of logic programming. Logic provides a convenient formalism for studying classical database problems and has the important property of being declarative, that is, it allows one to express what she wants rather than how to get it. For a long time, relational calculus and algebra were considered the relational database languages. However, there are simple operations, such as computing the transitive closure of a graph, which cannot be expressed with these languages. Datalog is a declarative query language for relational databases based on the logic programming paradigm. One of the peculiarities that distinguishes Datalog from query languages like relational algebra and calculus is recursion, which gives Datalog the capability to express queries like computing a graph transitive closure. Recent years have witnessed a revival of interest in Datalog in a variety of emerging application domains such as data integration, information extraction, networking, program analysis, security, cloud computing, ontology reasoning, and many others. The aim of this book is to present the basics of Datalog, some of its extensions, and recent applications to different domains.

Logic Programming in Action

Logic Programming in Action PDF Author: Gerard Comyn
Publisher: Springer Science & Business Media
ISBN: 9783540559306
Category : Business & Economics
Languages : en
Pages : 324

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Book Description
Logic programming enjoys a privileged position. It is firmly rooted in mathematical logic, yet it is also immensely practical, as a growing number of users in universities, research institutes, and industry are realizing. Logic programming languages, specifically Prolog, have turned out to be ideal as prototyping and application development languages. This volume presents the proceedings of the Second Logic Programming Summer School, LPSS'92. The First Logic Programming Summer School, LPSS '90, addressed the theoretical foundations of logic programming. This volume focuses onthe relationship between theory and practice, and on practical applications. The introduction to the volume is by R. Kowalski, one of the pioneers in the field. The following papers are organized into sections on constraint logic programming, deductive databases and expert systems, processing of natural and formal languages, software engineering, and education.

Foundations of Deductive Databases and Logic Programming

Foundations of Deductive Databases and Logic Programming PDF Author: Jack Minker
Publisher: Morgan Kaufmann
ISBN: 1483221121
Category : Computers
Languages : en
Pages : 752

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Book Description
Foundations of Deductive Databases and Logic Programming focuses on the foundational issues concerning deductive databases and logic programming. The selection first elaborates on negation in logic programming and towards a theory of declarative knowledge. Discussions focus on model theory of stratified programs, fixed point theory of nonmonotonic operators, stratified programs, semantics for negation in terms of special classes of models, relation between closed world assumption and the completed database, negation as a failure, and closed world assumption. The book then takes a look at negation as failure using tight derivations for general logic programs, declarative semantics of logic programs with negation, and declarative semantics of deductive databases and logic programs. The publication tackles converting AND-control to OR-control by program transformation, optimizing dialog, equivalences of logic programs, unification, and logic programming and parallel complexity. Topics include parallelism and structured and unstructured data, parallel algorithms and complexity, solving equations, most general unifiers, systems of equations and inequations, equivalences of logic programs, and optimizing recursive programs. The selection is a valuable source of data for researchers interested in pursuing further studies on the foundations of deductive databases and logic programming.

Applications of Logic Databases

Applications of Logic Databases PDF Author: Raghu Ramakrishnan
Publisher: Springer Science & Business Media
ISBN: 1461522072
Category : Computers
Languages : en
Pages : 280

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Book Description
The premise behind developing powerful declarative database languages is compelling: by enabling users to specify their queries (and their integrity constraints) in a clear, non-operational way, they make the user's task easier, and provide the database system with more opportunities for optimization. Relational database systems offer a striking proof that this premise is indeed valid. The most popular relational query language, SQL, is based upon relational algebra and calculus, i.e., a small fragment of first-order logic, and the ease of writing queries in SQL (in comparison to more navigational languages) has been an important factor in the commercial success of relational databases. It is well-known that SQL has some important limitations, in spite of its success and popUlarity. Notably, the query language is non-recursive, and support for integrity constraints is limited. Indeed, recognizing these problems, the latest standard, SQL-92, provides increased support for integrity constraints, and it is anticipated that the successor to the SQL-92 standard, called SQL3, RECURSIVE UNION operation [1]. Logic database systems have will include a concentrated on these extensions to the relational database paradigm, and some systems (e.g., Bull's DEL prototype) have even incorporated object-oriented features (another extension likely to appear in SQL3).

Logic Programming

Logic Programming PDF Author: Jan Maluszynski
Publisher: MIT Press
ISBN: 9780262631808
Category : Computers
Languages : en
Pages : 443

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Book Description
The themes of the 1997 conference are new theoretical and practical accomplishments in logic programming, new research directions where ideas originating from logic programming can play a fundamental role, and relations between logic programming and other fields of computer science. The annual International Logic Programming Symposium, traditionally held in North America, is one of the main international conferences sponsored by the Association of Logic Programming. The themes of the 1997 conference are new theoretical and practical accomplishments in logic programming, new research directions where ideas originating from logic programming can play a fundamental role, and relations between logic programming and other fields of computer science. Topics include theoretical foundations, constraints, concurrency and parallelism, deductive databases, language design and implementation, nonmonotonic reasoning, and logic programming and the Internet.

Building a Deductive Database

Building a Deductive Database PDF Author: Miguel Nussbaum
Publisher: Intellect Books
ISBN: 9780893917685
Category : Computers
Languages : en
Pages : 259

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Book Description
This text illustrates the main issues and concepts behind deductive databases through the description of a real system. Both theory and practice combine to advance a pragmatic approach. The book covers all related topics from basic theory to its coupling with a known database management system and its implementation on a commerical multiprocessor. An overview describes the problems related to the field. In the introduction, basic tools and references to related work give the necessary background context. Chapter two slowly begins building the concepts that finally lead to the kern algorithm used throughout the book - mixed top-down, bottom-up computation. Upon completion of the book, the reader should be able to build a deductive database. Implementation problems are exposed and solved and new strategies and algorithms with their performance behaviour are presented. Additionally the reader should also learn the benefits and drawbacks of working with an existing database and the usefulness of a parallel machine.

LOGIDATA+: Deductive Databases with Complex Objects

LOGIDATA+: Deductive Databases with Complex Objects PDF Author: Paolo Atzeni
Publisher: Springer Science & Business Media
ISBN: 9783540569749
Category : Computers
Languages : en
Pages : 273

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Book Description
This book presents a collection of coordinated scientific papers describing the work conducted and the results achieved within the LOGIDATA+ project, a research action funded by the Italian national research council CNR. Theaim of the LOGIDATA+ project is the definition of advanced database systems which significantly extend the functionalities of the current systems, with specific reference to the application areas for which relational systemsare not considered satisfactory. These new systems will allow the definitionof data with complex structures, the representation of semantic relationships between objects, and the use of powerful query and update languages. They will be based on a combination of techniques originatingfrom relational databases and logic programming, with contributions from object-oriented programming. The goal of the LOGIDATA+ project is the design, definition, and prototype implementation of a database management system with complex structures and a class hierarchy, to be accessed through a rule-based language. This book presents an integrated view of the project at the end of the first phase. The second phase will be mainly concerned with the implementation of prototypes.

Proceedings of the Second International Workshop on Database Programming Languages

Proceedings of the Second International Workshop on Database Programming Languages PDF Author: Richard Hull
Publisher: Morgan Kaufmann
ISBN: 9781558600720
Category : Computers
Languages : en
Pages : 442

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Book Description


Special Issue on Logic Programming in Databases

Special Issue on Logic Programming in Databases PDF Author: Giorgio Orsi
Publisher:
ISBN:
Category :
Languages : en
Pages : 117

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Book Description