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Proceedings of 7th International Conference and Workshop on Database and Expert Systems Applications: DEXA 96

9-10 Sept. 1996

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Displaying Results 1 - 25 of 74
  • Proceedings of 7th International Conference and Workshop on Database and Expert Systems Applications: DEXA 96

    Publication Year: 1996
    Request permission for commercial reuse | PDF file iconPDF (131 KB)
    Freely Available from IEEE
  • An approach to multiparadigm programming database systems

    Publication Year: 1996, Page(s):326 - 331
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    One way to tackle the impedance mismatch problem is to build multiparadigm programming database systems. The author analyzes a stratified LDL program by partitioning it into modules. It is shown by example that many embedded SQL programs may be programmed easily and elegantly in nonrecursive LDL. First, multiparadigm programming relational database systems may be built for nonrecursive LDL, which ... View full abstract»

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  • Classifying software process models based on natural language descriptions

    Publication Year: 1996, Page(s):320 - 325
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (752 KB)

    Reuse of the valuable knowledge gained through the realization of software projects is an important step in overcoming well-known problems of the software industry such as wrong schedules and cost estimations, low productivity, and low product quality. To promote this kind of reuse the authors propose an approach relying on an explicit representation of the software processes by process descriptio... View full abstract»

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  • Object-oriented modelling of periodicals

    Publication Year: 1996, Page(s):9 - 14
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (548 KB)

    As new online systems to publish documents are quickly arising, more powerful models for multimedia documents are needed. To achieve new tools for efficiently managing these large data banks, it is not enough to represent the structure of documents in a standard format. To classify and represent properties of these publications are also important considerations. We apply an extended object oriente... View full abstract»

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  • Definition of deductive conceptual models of OODBs

    Publication Year: 1996, Page(s):313 - 318
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (564 KB)

    The definition of deductive conceptual models (DCMs) using Prolog in order to specify different aspects of OODBs is proposed. The result of the specification process using this technique is an executable prototype of the system. Having a prototype directly available, along with the system specifications, is particularly useful in order to define additional elements in the context of OODBs (e.g. sc... View full abstract»

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  • Principled development of knowledge based systems-the importance of domain history

    Publication Year: 1996, Page(s):56 - 61
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (584 KB)

    MEKAS is a methodology for knowledge analysis originally developed at the University of Liverpool. We examine the role of one important aspect of the MEKAS not found in other methods, namely the emphasis placed on the investigation of the history of the domain under investigation. Practical case studies have shown that history can play a key role in identifying the nature of the domain, and the ty... View full abstract»

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  • Lassy-a system for analyzing grammatical dependencies in Latin

    Publication Year: 1996, Page(s):275 - 284
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (800 KB)

    The authors introduce the Latin analysis system Lassy, a system for analyzing Latin sentences. Tools for interacting with a database for morphological features are integrated along with interface for defining and applying a grammar database. They also give a small outline of the grammar model used in Lassy which is a pragmatic integration of linguistic theories known from both dependency and phras... View full abstract»

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  • Supporting large meetings with query awareness

    Publication Year: 1996, Page(s):457 - 462
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (700 KB)

    Computer support for large meetings has more profound effects on productivity than computer support for small meetings. This makes the design of support a particularly worthwhile task. The key design issue of “awareness for large groups” is discussed. “Query awareness” provides large groups and especially their facilitators with an overview over the group's activities. The ... View full abstract»

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  • Managing multiple representations of georeferenced elements

    Publication Year: 1996, Page(s):364 - 370
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    The paper presents a framework for the management of multiple representations of georeferenced elements in a GIS environment. This solution is presented from a database perspective, and is based on extending the DBV version approach with view facilities. Given this environment, users can build consistent views of their modelled world, creating and combining different representation frameworks. The... View full abstract»

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  • Knowledge acquisition and representation through neighborhoods

    Publication Year: 1996, Page(s):49 - 55
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    Knowledge representation is a major component of knowledge acquisition. A theoretical model for the representation of knowledge in a given problem domain is developed through the use of the mathematical notion of neighborhood. The model as flexible enough to support the representation of a semantic structure which can be mathematically encoded as a weak distance, a binary relation, or a topology. ... View full abstract»

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  • Interfacing a relational database using conceptual graphs

    Publication Year: 1996, Page(s):499 - 505
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (588 KB)

    The conceptual graph model is a knowledge representation formalism. Taking this formalism as a basis, the authors proposed a modelisation of relational database notions (schemata, data, queries). The article is based on this modelisation. They propose to use a copy of the structure of a relational database (relation schemata, set of attribute names) represented by a conceptual graph knowledge base... View full abstract»

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  • Conceptual modeling of statistical data

    Publication Year: 1996, Page(s):377 - 382
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (700 KB)

    A conceptual modeling of statistical objects based on a functional approach is presented. The notion of attribute as a basic modeling construct is used. The presented results show how to deal exactly some very known notions and how to extend and precise them. As a logical consequence of using the typed lambda calculus for description of semantics, some new constructs were proposed. A horizontal an... View full abstract»

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  • Object histories as a foundation for an active OODB

    Publication Year: 1996, Page(s):2 - 8
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (656 KB)

    Several links exist between active and temporal databases. These are summarised by the observation that rules are triggered by a specified evolution of the database. We discuss the relation between active and temporal database using DEGAS, an object based active database programming language. To achieve full active database functionality, a DEGAS object records its complete history. Hence, all dat... View full abstract»

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  • Optimizing the user-interface of a knowledge-based system

    Publication Year: 1996, Page(s):166 - 171
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    The knowledge-based system WIWENA was developed at the Technical University of Berlin for supporting design engineers during the selection and dimensioning of standard components. The system was then subjected to user tests in experiments during which design engineers had to solve a small design task in six hours. One set of designers could use WIWENA for selecting and dimensioning standard compon... View full abstract»

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  • Using rough sets for rough classification

    Publication Year: 1996, Page(s):268 - 273
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    Rough sets theory is emerging as a powerful tool for knowledge discovery in databases. The author introduce a rough sets based method for learning classification rules. The author's method will not necessarily derive all the consistent classification rules from a database, nor will the rules derived be totally consistent with the database. Rules are derived when they meet some user specified crite... View full abstract»

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  • Modeling workflow using tasks and transactions

    Publication Year: 1996, Page(s):451 - 456
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (592 KB)

    The need for workflow management is apparent from the recent increase in the number of products (Lotus Note, SAP Business Workflow, Workmanager) that aim to support various business workflow features. However, a conceptual modeling or specification of workflow is paramount if workflows are to be managed. The authors propose using two distinct constructs to model workflow, the transaction and the t... View full abstract»

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  • An incremental update propagation scheme for a cooperative transaction model

    Publication Year: 1996, Page(s):353 - 362
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (872 KB)

    Engineering design applications require the support of long transactions in cooperative environments The problem of the existing copy/update/merge approaches is that the partial effects of a committed transaction may be not part of the merged version. The paper introduces a new cooperative transaction model, which allows updates to be progressively notified or propagated into other transactions ac... View full abstract»

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  • The ARCS data point processor

    Publication Year: 1996, Page(s):40 - 47
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (756 KB)

    The paper presents the main ideas behind our soft real time database system prototype called Data Point Processor (DPP). The main aim in designing such systems is to minimize the application programs part of database management and therefore to avoid heavy data transfers between the database server and the application client due to polling. Our design is based on the observation of data transfer a... View full abstract»

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  • Checking extensional constraints of federated schemata

    Publication Year: 1996, Page(s):398 - 403
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (484 KB)

    The authors describe a federated information system that uses a terminological system for the integration of heterogeneous databases. They present how this system is used for specifying correspondences between knowledge belonging to local schemas. These correspondences are specified as a set of assertions that cover the inter- and intra-schema constraints. They also present an algorithm for checki... View full abstract»

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  • On the query translation in federative relational databases

    Publication Year: 1996, Page(s):491 - 498
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (816 KB)

    The authors address the problem of query translation in a federative relational database system, and present a new method to specify semantic correspondences and data mappings. Several algorithms are described and discussed in detail, which can be used to translate queries automatically even if the local databases have data and schema conflicts View full abstract»

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  • New metaphors for a visual query language

    Publication Year: 1996, Page(s):229 - 236
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (848 KB)

    Metaphors have been proved useful in facilitating learning and using an operating system or various other tools. The paper shows, through the VISTA(*) query language, the benefits of using metaphors in the field of database querying by end users. Within VISTA, metaphors help in visualizing concepts of the object-oriented semantic data model and in facilitating the expression of operatio... View full abstract»

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  • Extracting symbolic objects from relational databases

    Publication Year: 1996, Page(s):514 - 519
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    Our aim is to define operators to retrieve groups of individuals from a relational database. The way we describe these groups makes it possible to analyse them by symbolic data analysis methods which extend classical ones to more complex data. In so far as the input consists of groups of data extensionally defined in the database, our problem is to find the best description representing each group... View full abstract»

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  • Specification of the database behavior through the active object paradigm

    Publication Year: 1996, Page(s):141 - 146
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (628 KB)

    The paper is concerned with the use of the active object paradigm in designing active databases. The active object is an interesting means to best represent the dynamics of an information system. The authors propose a classification of real world objects following two categories: (i) the persistent active object that describes an object offering services when requested and reacts to events produce... View full abstract»

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  • Information management to meet the needs of legal professionals

    Publication Year: 1996, Page(s):371 - 376
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    The present trend of computer usage in legal practice and the availability of on-line legal information have created a pressing need for practical systems which can retrieve required pieces of information in a precise fashion and support the use of the retrieved information in legal practice. The authors attempt to address these needs by combining the strengths of two contrasting technologies: hyp... View full abstract»

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  • Implementation of checkout/checkin mechanism on object-oriented database systems

    Publication Year: 1996, Page(s):298 - 303
    Cited by:  Papers (1)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    The authors discuss the implementation of the checkout/checkin mechanism in object-oriented database systems. Objects are no longer modified directly in the public database. Each user has a private workspace and his/her tasks are performed in the workspace. When the tasks are done, the user checks in modified objects in the public database. They introduce several classes of long duration locks in ... View full abstract»

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