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Database Engineering and Applications Symposium, 1997. IDEAS '97. Proceedings., International

Date 25-27 Aug. 1997

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Displaying Results 1 - 25 of 45
  • Proceedings Ideas'97 International Database Engineering And Applications Symposium

    Publication Year: 1997, Page(s):iii - vii
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    Freely Available from IEEE
  • Proceedings of the 1997 International Database Engineering and Applications Symposium (Cat. No.97TB100166)

    Publication Year: 1997
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    Freely Available from IEEE
  • Author index

    Publication Year: 1997, Page(s): 403
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    Freely Available from IEEE
  • Sequence comparison using a relational database approach

    Publication Year: 1997, Page(s):126 - 131
    Cited by:  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (484 KB)

    A variety of heterogenous data sources is available in the field of molecular biology. The authors focus lies on the biological sequence data, i.e. data maintained in collections like EMBL or SWISS-PROT. They propose a relational model based on an entity-relationship approach for this discourse world. This is the foundation of a flexible architecture useful for a variety of purposes, e.g. for sequ... View full abstract»

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  • Design and evaluation of the mechanism for object references in a parallel object-oriented database system

    Publication Year: 1997, Page(s):337 - 346
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (864 KB)

    Four object reference mechanisms for a parallel object-oriented database system (OODBS) and used by a massively parallel programming language (MAPPLE) are tested by the parallel 001 Benchmark. Out of these mechanisms, the object allocation table (OAT) was the most successful when many objects existed and were moved across processors. The OAT stores object identifiers (OIDs) that are independent of... View full abstract»

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  • Schema evolution in object databases by catalogs

    Publication Year: 1997, Page(s):368 - 376
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (788 KB)

    We are concerned with schema evolution in object oriented databases (OODB) that is processed by a modification of the classes of the schema. We present a new categorization of the different modifications in three categories: primitive, composite and complex modifications. On this basis, we propose a method by decomposition for addressing conceptual schema evolution: “real-life” complex... View full abstract»

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  • A case study for the management of a set of spectrally analysed signals based on OODBMS

    Publication Year: 1997, Page(s):121 - 125
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    The paper is a case study for the management of a set of synthetic harmonic and real-world sampled signals analysed by various spectral methods at some desired orders. An OODBMS schema was preferred to an alternative RDBMS, exploiting the specific advantages of the object oriented-approach (direct correspondence between real-world and database objects, inheritance, transparent modularity-extendabi... View full abstract»

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  • Query processing in the ROL system

    Publication Year: 1997, Page(s):327 - 336
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (868 KB)

    The ROL system is a novel deductive object-oriented database system that has been implemented at the University of Regina. It provides a uniform rule-based declarative language for defining, manipulating and querying databases, which integrates important features of deductive databases and object-oriented databases. It supports object identity, complex objects, classes, class hierarchies, multiple... View full abstract»

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  • An analysis of database rules

    Publication Year: 1997, Page(s):113 - 117
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    Maintaining the integrity of the knowledge represented within database rules is a complex business. In order to analyse the maintenance of integrity, a uniform framework for the representation of both data and database rules is introduced. A conceptual model is constructed using this uniform framework. The maintenance of the integrity of this conceptual model is analysed. In particular a generalis... View full abstract»

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  • A fast transformation method to semantic query optimisation

    Publication Year: 1997, Page(s):319 - 326
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (588 KB)

    Semantic query optimisation is a comparatively recent approach for the transformation of a given query into equivalent alternative queries using matching rules in order to select an optimum query based on the costs of executing these alternative queries. The most important aspect of this optimisation approach is that this resultant query can be processed more efficiently than the original query. T... View full abstract»

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  • Optimal view selection for multidimensional database systems

    Publication Year: 1997, Page(s):45 - 52
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    This paper presents a greedy algorithm to compute the best set of views with respect to a given set of queries and their frequencies, for multidimensional databases. Previous approaches have not taken frequency of queries into consideration. We show that our proposed algorithm determines a set of views with the most benefits compared to previous approaches View full abstract»

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  • Alternative correctness criteria for multiversion concurrency control and a locking protocol via freezing

    Publication Year: 1997, Page(s):73 - 81
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (756 KB)

    Concurrency control protocols based on multiversions have been used in some commercial transaction processing systems in order to provide the serializable executions of transactions. In the existing protocols, transactions are allowed to read only the most recent version of each data item in order to ensure the correct execution of transactions. However this feature is not desirable in some advanc... View full abstract»

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  • A replica control method for improving availability for read-only transactions

    Publication Year: 1997, Page(s):104 - 112
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (812 KB)

    Data replication is often considered in distributed database systems to enhance availability and performance. The benefit of data replication, however can only be realized at the cost of maintaining the consistency of data. In particular, network partition failures make it more difficult to achieve high data availability while ensuring strong correctness criteria such as l-copy serializability. We... View full abstract»

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  • A formal specification strategy for electronic commerce

    Publication Year: 1997, Page(s):201 - 210
    Cited by:  Papers (7)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (840 KB)

    Most current Web applications perform operations that are basically read-only (retrieval of data/documents), so conflicts between transactions do not arise. However as Web applications increasingly become more sophisticated, permitting both concurrent data retrieval and update operations to remote databases, the potentials for conflicts between transactions becomes very high. Therefore, we must en... View full abstract»

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  • Multi-view memory to support OS locking for transaction systems

    Publication Year: 1997, Page(s):309 - 318
    Cited by:  Papers (1)  |  Patents (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (924 KB)

    The focus of this paper is to investigate the use of the multi-view memory (MVM) model and its supporting architecture in providing efficient locking services for transaction processing systems. The model provides for enforcement of access control protocols through FSM specification on units of data that can vary in size from one region of memory to another. Threads executing transactions do not e... View full abstract»

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  • Database support for conflict detection in a computer-supported cooperative work environment

    Publication Year: 1997, Page(s):240 - 249
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1040 KB)

    Computer supported cooperative work (CSCW) requires the simultaneous consideration of a huge diversity of issues regarding a given object under design. Successful support for CSCW requires a conceptually integrated environment that can address this diversity of issues and assist with the detection and resolution of conflicts among design constraints and decisions. The Automated Constraint Refineme... View full abstract»

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  • An OODBMS graphical development environment

    Publication Year: 1997, Page(s):33 - 42
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (748 KB)

    A software development environment is a collection of tools that support various phases of its development. The environment wherein an application is developed may have a larger effect on the programming process than does the language used for the application. As such, tools are very important; Graphical Development Environment for Postgres (GDEP) is such a tool which enables OODB developers to be... View full abstract»

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  • Exception-handling extension for an object-oriented DBMS

    Publication Year: 1997, Page(s):138 - 143
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (540 KB)

    The paper describes the implementation of an exception handling facility for the Open OODB, a research database system developed by Texas Instruments. The initial OODB database has been extended and modified to support exception handling. An extended exception handling model was designed and implemented which fits into the existing Open OODB architecture and computation model View full abstract»

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  • An extension of SQL to support ordered domains in relational databases

    Publication Year: 1997, Page(s):358 - 367
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (892 KB)

    The ordered relational model is an extension of the relational model which incorporates partial orderings into data domains. We demonstrate that the ordered relational model is suitable for modelling advanced applications involving tree-structured information, incomplete information and temporal information. We describe OSQL, which is an extension of SQL for the ordered relational model, and show ... View full abstract»

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  • Tree balance and node allocation

    Publication Year: 1997, Page(s):63 - 72
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (996 KB)

    We consider the query evaluation problem in multidatabases and develop an algorithm for generating optimal plans for queries submitted to an integrated schema. We try to extend the basic transformation step used in the method proposed by (Du et al., 1994) and construct a dynamic time table to support a query optimization process. In this way, not only the join tree balance, but also the node alloc... View full abstract»

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  • A minimal-model based horizontal fragmentation algorithm for disjunctive deductive databases

    Publication Year: 1997, Page(s):94 - 103
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (972 KB)

    Disjunctive deductive databases (DDDBs) capture indefinite information, i.e., imprecise or partial knowledge of the real world, and are more general than definite deductive databases that can only represent unconditionally true facts. Formal approaches for fragmenting a DDDB, with a view to distribute the DDDB and then design a query optimization strategy for the distributed DDDB, are lacking. We ... View full abstract»

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  • OFEM: an approach towards detection and reduction of objectives inconsistencies

    Publication Year: 1997, Page(s):250 - 259
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (960 KB)

    The importance of improving understanding and communication between users and system developers in order to develop a structured description of the business, its information system needs and objectives through enterprise modelling approaches, has been increasingly recognized. Many enterprise modelling schemas are yielded to represent the different dimensions of the enterprise and different user vi... View full abstract»

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  • A uniform approach for selecting views and indexes in a data warehouse

    Publication Year: 1997, Page(s):151 - 160
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (932 KB)

    Careful selection of aggregate views and some of their most used indexes to materialize in a data warehouse reduces the warehouse query response time as well as warehouse maintenance cost under some storage space constraint. Data warehouses collect and store large amounts of integrated enterprise data from a number of independent data sources over a long period of time. Warehouse data are used for... View full abstract»

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  • Bottom-up scientific databases based on sets and their top-down usage

    Publication Year: 1997, Page(s):171 - 179
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (788 KB)

    The paper proposes a data model for a scientific database. Scientific applications require the DBMS support of the discovery process. Unstructured or semi-structured scientific data is required for storage in databases, and manipulation as structured data. To meet these requirements, the proposed data model has the following features. It is based on the concept of sets in order that a database has... View full abstract»

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  • Evolving databases: an application to electronic commerce

    Publication Year: 1997, Page(s):191 - 200
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1084 KB)

    Many complex and dynamic database applications such as product modeling and negotiation monitoring require a number of features that have been adopted in semantic models and databases such as active rules, constraints, inheritance, etc. Unfortunately, each feature has largely been considered in isolation. Furthermore, in a commercial negotiation, participants staking their financial well beings wi... View full abstract»

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