Objetivo
COMPULOG II has the long term goal of developing the foundations for an integrated, logic-based software environment, including associated software development tools, that deals with all aspects of computing. The language and tools will extend the logic programming paradigm by incorporating enhancements from related paradigms in the areas of databases, artificial intelligence and mathematical logic. COMPULOG II will develop and use the G?del language developed in COMPULOG to integrate many of the other developments.
The research is concerned with the extension of logic programming to improve its knowledge representation and problem solving capabilities.
Two approaches towards an integration of object oriented features with deductive systems have been considered on the one hand the deductive object oriented database (OODB) system ConceptBase, developed has been enriched by concept language characteristics. On the other hand, more features have been added to concept language in order to make them applicable to practical systems, where ConceptBase has been chosen as a testbed when possible. Both approaches concentrated on procedures for querying knowledge bases and for reasoning about queries.
With respect to nonmonotonic and metareasoning, emphasis was placed on the following main research topics:
analysis of various forms of nonmonotonic reasoning, including abduction, belief revision, and counterfactuals;
computational aspects of nonmonotonic reasoning;
design and semantics of metalevel features, and their applications to various forms of reasoning.
The program development work focused on control issues and specification issues. More specifically the following topics were studied for logic programming languages: specification, synthesis and transformation of programs, program analysis, termination, occur check problem, partial deduction.
With respect to knowledge base systems, the ConceptBase deductive object oriented database was further developed with the aim of using it as a platform for testing the integration of solutions from deductive databases, object oriented databases and concept languages. Also the subject of belief revision, dealing with time in deductive databases, and the problem of diagnosis and repair were studied.
Ways of efficient implementation of Goedel metaprogramming facilities were studied. Also, the problem of emitting code which is as clean as possible was investigated.
Legal reasoning work focused on the interpretation of legal knowledge and its formalization in declarative systems. A number of extensions of logic programming needed to make it closer to the natural language used in legislation have been identified.
APPROACH AND METHODS
The work is organised into four themes. The first two are concerned with extending the expressive power of logic programming and developing methodologies for building applications. Special emphasis will be given to integrating objects and logic in the context of data and knowledge based systems. Work on non-monotonic reasoning will be concerned both with extensions and restrictions of negation as failure, and with its use to formalise common sense reasoning. Special attention will be given to the computational behaviour of such formalisation. Work on meta-reasoning will concentrate on improving the technology for meta-programming and on treating theories (programs, program specifications, databases, and knowledge representations) as objects. The third theme, program development, is concerned with the dynamics of constructing, maintaining and analysing appropriately extended logic programs, program specifications, databases, and knowledge representations. The fourth will implement and integrate appropriate results from COMPULOG, using the Goedel language as a platform for integrating work on types, meta-reasoning and program development, and integrating the same techniques with techniques of non-monotonic reasoning for knowledge base systems. This work will focus on the development of structured knowledge representations and on query evaluation and integrity checking methods. Extensions needed to make logic programming closer to the natural language used in legal documents (types, non-monotonic reasoning, and meta-reasoning) will also be investigated.
POTENTIAL
The knowledge gained from the research carried out in this project will have an impact on the design of logic-based software environment. The programming language Goedel will be a useful tool for declarative programming based on logic programming in which non-monotonic and meta- reasoning can be properly formalised. The deductive object-oriented database system ConceptBase will be a sophisticated tool for database applications.
Ámbito científico (EuroSciVoc)
CORDIS clasifica los proyectos con EuroSciVoc, una taxonomía plurilingüe de ámbitos científicos, mediante un proceso semiautomático basado en técnicas de procesamiento del lenguaje natural. Véas: El vocabulario científico europeo..
CORDIS clasifica los proyectos con EuroSciVoc, una taxonomía plurilingüe de ámbitos científicos, mediante un proceso semiautomático basado en técnicas de procesamiento del lenguaje natural. Véas: El vocabulario científico europeo..
- ciencias naturales informática y ciencias de la información inteligencia artificial
- ciencias naturales informática y ciencias de la información base de datos
- ciencias naturales matemáticas matemáticas puras matemáticas discretas lógica matemática
- ciencias naturales informática y ciencias de la información ingeniería del conocimiento
- ciencias naturales informática y ciencias de la información software desarrollo de software
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Las convocatorias de propuestas se dividen en temas. Un tema define una materia o área específica para la que los solicitantes pueden presentar propuestas. La descripción de un tema comprende su alcance específico y la repercusión prevista del proyecto financiado.
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Régimen de financiación (o «Tipo de acción») dentro de un programa con características comunes. Especifica: el alcance de lo que se financia; el porcentaje de reembolso; los criterios específicos de evaluación para optar a la financiación; y el uso de formas simplificadas de costes como los importes a tanto alzado.
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Coordinador
1009 AB/10 AMSTERDAM
Países Bajos
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