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Data Engineering, 1996. Proceedings of the Twelfth International Conference on

Date Feb. 26 1996-March 1 1996

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Displaying Results 1 - 25 of 80
  • IN MEMORIAM James Clifford

    Publication Year: 1996
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    Freely Available from IEEE
  • IN MEMORIAM Gennady Antoshenkov

    Publication Year: 1996
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    Freely Available from IEEE
  • Author index

    Publication Year: 1996
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    Freely Available from IEEE
  • Query folding

    Publication Year: 1996, Page(s):48 - 55
    Cited by:  Papers (12)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (660 KB)

    Query folding refers to the activity of determining if and how a query can be answered using a given set of resources, which might be materialized views, cached results of previous queries, or queries answerable by other databases. We investigate query folding in the context where queries and resources are conjunctive queries. We develop an exponential time algorithm that finds all complete or par... View full abstract»

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  • Refined triggering graphs: a logic-based approach to termination analysis in an active object-oriented database

    Publication Year: 1996, Page(s):384 - 391
    Cited by:  Papers (6)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (752 KB)

    Presents the notion of refined triggering graphs (RTG) for analyzing termination of active rules in object-oriented databases (OODBs). The RTG method consists of mapping the possibility that one active rule can trigger another to the satisfiability of a well-defined logic formula called a triggering formula. The unsatisfiability of the triggering formula is then an indication that the rule trigger... View full abstract»

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  • Authorization and access control in IRO-DB

    Publication Year: 1996, Page(s):40 - 47
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (620 KB)

    The paper describes authorization and access control in the IRO-DB database system, a system supporting interoperable access between relational and object oriented databases. The security policy developed is a federated administrative discretionary access control policy which supports positive, negative, as well as implied authorization, includes a procedure for conflict resolution within the set ... View full abstract»

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  • A proposed method for creating VCR functions using MPEG streams

    Publication Year: 1996, Page(s):380 - 382
    Cited by:  Papers (6)  |  Patents (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    The development of video-on-demand (VOD) systems for movie delivery requires that the user be able to perform VCR functions over a broadband network system. These functions include Play, Pause, Fast Forward, and Fast Rewind. No standard method exists between content developers, server manufacturers and client applications to provide these functions. This paper proposes a standard method for implem... View full abstract»

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  • ODMG 93-the emerging object database standard

    Publication Year: 1996, Page(s):674 - 676
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    Gives a very brief overview about the different chapters of the Object Database Standard ODMG-93 rel 1.2. This standard is probably the most consistent document available and very well received from the ODBMS vendor community as well as the user community. The author gives a comprehensive overview of the standard and the extension that have been made since the initial publishing. The overview incl... View full abstract»

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  • Deferred updates and data placement in distributed databases

    Publication Year: 1996, Page(s):469 - 476
    Cited by:  Papers (15)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (744 KB)

    Commercial distributed database systems generally support an optional protocol that provides loose consistency of replicas, allowing replicas to be inconsistent for some time. In such a protocol, each replicated data item is assigned a primary copy site. Typically, a transaction updates only the primary copies of data items, with updates to other copies deferred until after the transaction commits... View full abstract»

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  • Secure mediated databases

    Publication Year: 1996, Page(s):28 - 37
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (856 KB)

    With the evolution of the information superhighway, there is now an immense amount of information available in a wide variety of databases. Furthermore, users often have the ability to access legacy software packages developed by external sources. However, sometimes both the information provided by a data source, as well as one or more of the functions available through a software package may be s... View full abstract»

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  • Database extensions for complex domains

    Publication Year: 1996, Page(s):200 - 202
    Cited by:  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    Future versions of the Oracle Server will provide an open and extensible framework for supporting complex data domains including, but not limited to, text, image, spatial, video, and OLAP. This framework encompasses features for defining, storing, updating, indexing, and retrieving complex forms of data with full transaction semantics. The underpinning for these features is an extended Oracle Serv... View full abstract»

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  • Hypermedia database “Himotoki”, and its applications

    Publication Year: 1996, Page(s):372 - 379
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (652 KB)

    Describes the design concept of a hypermedia database called “Himotoki” and its navigational capabilities. A hypermedia database is a system that integrates hypermedia operations with database models. Its advantages are: (a) its structured design can improve authoring and browsing capabilities for large hypermedia applications, (b) nodes and links can be automatically generated under c... View full abstract»

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  • An SQL3 snapshot

    Publication Year: 1996, Page(s):666 - 672
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (620 KB)

    The third major generation of the standard for the SQL database language, known as SQL3, is nearing completion. Many significant new features have been added to SQL, both in areas traditionally addressed by SQL and in pursuit of adding object technology to the language. The standard has been partitioned into a number of distinct parts, each of which may progress at its own rate. Publication of SQL... View full abstract»

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  • The Gold Text Indexing Engine

    Publication Year: 1996, Page(s):172 - 179
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (928 KB)

    The proliferation of electronic communication including computer mail, faxes, voice mail, and net news has led to a variety of disjoint applications and usage paradigms that forces users to deal with multiple different user interfaces and access related information arriving over the different communication media separately. To enable users to cope with the overload of information arriving over het... View full abstract»

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  • Transaction management for a distributed object storage system WAKASHI-design, implementation and performance

    Publication Year: 1996, Page(s):460 - 468
    Cited by:  Papers (11)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1000 KB)

    This paper presents the transaction management in a high performance distributed object storage system WAKASHI. Unlike other systems that use centralized client/server architecture and other conventional buffer management for distributed persistent object management, WAKASHI is based on symmetric peer-peer architecture and employs memory-mapping and distributed shared virtual memory techniques. Se... View full abstract»

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  • A log-stuctured organization for tertiary storage

    Publication Year: 1996, Page(s):20 - 27
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    We present the design of a log-structured tertiary storage (LTS) system. The advantage of this approach is that it allows the system to hide the details of jukebox robotics and media characteristics behind a uniform, random-access, block-oriented interface. It also allows the system to avoid media mount operations for writes, giving a write performance similar to that of secondary storage View full abstract»

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  • δ-sets for optimized reactive adaptive playout management in distributed multimedia database systems

    Publication Year: 1996, Page(s):584 - 592
    Cited by:  Papers (5)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1032 KB)

    A novel database system service called a playout management service, which performs multimedia presentations was proposed by the authors recently [1st Int. Workshop on Multimedia Database Mgmt. Systems, pp. 38-47, 1995]. In distributed multimedia database systems without end-to-end guarantees, such a playout management service faces the potential problem that system performance can become insuffic... View full abstract»

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  • Client-based logging for high performance distributed architectures

    Publication Year: 1996, Page(s):344 - 351
    Cited by:  Papers (9)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (892 KB)

    Proposes logging and recovery algorithms for distributed architectures that use local disk space to provide transactional facilities locally. Each node has its own log file where all log records for updates to locally cached pages are written. Transaction rollback and node crash recovery are handled exclusively by each node and log files are not merged at any time. Our algorithms do not require an... View full abstract»

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  • Tioga-2: a direct manipulation database visualization environment

    Publication Year: 1996, Page(s):208 - 217
    Cited by:  Papers (17)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1544 KB)

    The paper reports on user experience with Tioga, a DBMS centric visualization tool developed at Berkeley. Based on this experience, we have designed Tioga-2 as a direct manipulation system that is more powerful and much easier to program. A detailed design of the revised system is presented, together with an extensive example of its application View full abstract»

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  • DB2 LOBs: the teenage years

    Publication Year: 1996, Page(s):192 - 199
    Cited by:  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (740 KB)

    Previous versions of DB2 Common Server had large objects (LOBs) that were neither large nor functional. Their size was limited to 32,700 bytes and, until recently when support for SUBSTR and CONCAT was added, there was no function available on these objects at all. DB2 LOBs were infants. However, with the latest release of DB2 Common Server, Version 2.1, LOBs have matured considerably supporting s... View full abstract»

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  • A next-generation industry multimedia database system

    Publication Year: 1996, Page(s):364 - 371
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB)

    New multimedia applications have emerged on top of information infrastructures, such as on-demand services, digital libraries and museums, online shopping and document management, which require new databases. That is, next-generation database systems must enable users to efficiently and flexibly develop and execute such advanced multimedia applications. We focus on development of a database system... View full abstract»

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  • A graph-theoretic approach to indexing in object-oriented databases

    Publication Year: 1996, Page(s):230 - 237
    Cited by:  Papers (1)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    A graph theoretic approach to the path indexing problem is proposed. We represent the indexing relationships supported by indices allocated in the classes in the path in the form of a directed graph. All the previous approaches directly fit into the scheme and form a hierarchy of complexity with respect to the time required for selection of the optimal index configuration. Based on the general sch... View full abstract»

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  • A directory service for a federation of CIM databases with migrating objects

    Publication Year: 1996, Page(s):142 - 150
    Cited by:  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (684 KB)

    We propose a novel directory scheme for a large federation of databases where object migration is in response to manufacturing events. In our directory scheme, objects report their location to a directory server instead of the traditional method of the directory servers polling sites in the network. The directory is distributed among multiple servers to avoid bottlenecks during query processing. A... View full abstract»

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  • An executable graphical representation of mediatory information systems

    Publication Year: 1996, Page(s):124 - 131
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (716 KB)

    We present an approach towards a unified modeling and query processing tool for mediatory information systems. Based upon coloured Petri nets we are able to model the integration of parametric data (external, uncertain and temporal information) and to visualize the dataflow in mediatory information systems View full abstract»

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  • Maintenance of discovered association rules in large databases: an incremental updating technique

    Publication Year: 1996, Page(s):106 - 114
    Cited by:  Papers (159)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (740 KB)

    An incremental updating technique is developed for maintenance of the association rules discovered by database mining. There have been many studies on efficient discovery of association rules in large databases. However, it is nontrivial to maintain such discovered rules in large databases because a database may allow frequent or occasional updates and such updates may not only invalidate some exi... View full abstract»

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