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Proceedings of IEEE 9th International Conference on Data Engineering

19-23 April 1993

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  • Proceedings of IEEE 9th International Conference on Data Engineering

    Publication Year: 1993
    Request permission for commercial reuse | PDF file iconPDF (314 KB)
    Freely Available from IEEE
  • A descriptive semantic formalism for medicine

    Publication Year: 1993, Page(s):624 - 631
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (736 KB)

    It is argued that current clinical information systems incorporate oversimplistic, prescriptive data models that are not faithful to clinicians' observations. A non-prescriptive descriptive semantic formalism, Structured Meta Knowledge (SMK), which unifies a terminological knowledge base with controlled assertional capabilities with the medical record and supports the semantic control necessitated... View full abstract»

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  • A language multidatabase system communication protocol

    Publication Year: 1993, Page(s):633 - 640
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    Rapid growth in the area of multidatabase systems (MDBSs), which involve both the access of global data and distributed transaction processing, has created a need for programming languages that provide communication reliability and powerful synchronization. The requirements of MDBSs are reviewed, and the Vienna Parallel Logic programming language is presented. The ways to realize an MDBS communica... View full abstract»

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  • Execution of extended multidatabase SQL

    Publication Year: 1993, Page(s):641 - 650
    Cited by:  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (772 KB)

    The multidatabase structured query language (MSQL) is an extension of the SQL query language that provides new functions for nonprocedural manipulation of data in different and mutually non-integrated relational databases. The problems introduced by these new functions are discussed, and the semantics of multiple updates, global commitment, and rollback are analyzed. New language constructs are de... View full abstract»

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  • Polyglot: extensions to relational databases for sharable types and functions in a multi-language environment

    Publication Year: 1993, Page(s):651 - 660
    Cited by:  Papers (1)  |  Patents (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (876 KB)

    Polyglot is an extensible relational-database-type system that supports inheritance, encapsulation, and dynamic method dispatch. It allows use from multiple application languages and permits objects to retain their behavior as they cross the boundary between database and application program. The authors describe the design of Polyglot, extensions to the structured query language (SQL) to support t... View full abstract»

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  • Deterministic semantics of set-oriented update sequences

    Publication Year: 1993, Page(s):4 - 13
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (828 KB)

    An iterator is proposed that allows sequences of update operations to be applied in a set-oriented way with deterministic semantics. Because the mechanism is independent of a particular model, it can be used in the relational and in object-oriented ones. Thus, the deterministic semantics of embedded structured query language (SQL) cursors and of triggers that are applied after (set-oriented) SQL u... View full abstract»

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  • A query model for object-oriented databases

    Publication Year: 1993, Page(s):163 - 172
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (968 KB)

    A formal object-oriented query model is described in terms of an object algebra. Both the structure and the behavior of objects are handled. An operand and the output from a query in the object algebra are defined to have a pair of sets, i.e. a set of objects and a set of message expressions, where a message expression is a valid sequence of messages. The closure property is therefore maintained i... View full abstract»

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  • Transaction support in a log-structured file system

    Publication Year: 1993, Page(s):503 - 510
    Cited by:  Papers (7)  |  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (660 KB)

    The design and implementation of a transaction manager embedded in a log-structured file system are described. Measurements indicate that transaction support on a log-structured file system offers a 10% performance improvement over transaction support on a conventional read-optimized file system. When the transaction manager is embedded in the log-structured file system, the resulting performance ... View full abstract»

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  • The O++ database programming language: implementation and experience

    Publication Year: 1993, Page(s):61 - 70
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    Ode, a database system and environment based on the object paradigm, is discussed. Ode is defined, queried and manipulated using the database programming language O++, which is based on C++. The O++ compiler translates O++ programs into C++ programs that contain calls to the Ode object manager. The implementation of O++, the Ode object manager, and the translation of the database facilities in O++... View full abstract»

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  • Using active database techniques for real time engineering applications

    Publication Year: 1993, Page(s):100 - 107
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (620 KB)

    An active database model for representing engineering design, simulation and monitoring applications is described. The physical aspects of these applications are modeled by structural objects. The functions of the application are modeled by functional objects. The interaction between structures and functions is modeled by interaction objects. Events relate structures and functions such that any st... View full abstract»

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  • Model-based design bases for task-oriented systems

    Publication Year: 1993, Page(s):662 - 669
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (548 KB)

    The nature of task-oriented application design and the rationale in building interactive design support tools are discussed. A model-based approach for the representation of design knowledge is introduced. The approach comprises an end-user task model, a problem domain data model, and an interaction domain model. These models are mapped onto an object hierarchy, allowing the construction of a desi... View full abstract»

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  • Updating intensional predicates in deductive databases

    Publication Year: 1993, Page(s):14 - 21
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (704 KB)

    A method for updating deductive databases that allows the insertion or deletion of a fact over intensional predicates in a deterministic manner is presented. It is shown that, contrary to most other approaches, inserting or deleting facts over tensional predicates can always be accomplished without having to make choices. The approach relies on well-founded semantics and on the following two basic... View full abstract»

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  • Towards more flexible schema management in object bases

    Publication Year: 1993, Page(s):174 - 181
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB)

    An approach to database schema management is presented that allows easy tailoring of schema management, high-level specification of schema consistency, and development of advanced tools supporting the user during schema evolution. The application of this approach to the development of a simple schema manager for the core of the GOM database programming language is described. The flexibility afford... View full abstract»

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  • Audio/video databases: an object-oriented approach

    Publication Year: 1993, Page(s):381 - 390
    Cited by:  Papers (16)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (904 KB)

    The notion of an audio/video (AV) database is introduced. An AV database is a collection of AV values such as digital audio and video data and AV activities such as interconnectable components used to process AV values. Two abstraction mechanisms, temporal composition and flow composition, allow the aggregation of AV values and AV activities respectively. An object-oriented framework, incorporatin... View full abstract»

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  • Two-phase commit optimizations and tradeoffs in the commercial environment

    Publication Year: 1993, Page(s):520 - 529
    Cited by:  Papers (9)  |  Patents (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (812 KB)

    Eleven two-phase commit (2PC) protocol variations that optimize towards the normal case are described and compared with a baseline 2PC protocol. Environments in which they are most effective are discussed. The variations are compared and contrasted in terms of number of message flows, number of log writes (both forced and non-forced), probability of heuristic damage, how damage is reported, and ot... View full abstract»

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  • Construction of a relational front-end for object-oriented database systems

    Publication Year: 1993, Page(s):476 - 483
    Cited by:  Papers (10)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (752 KB)

    Proposes a solution for the construction of a relational front-end for object-oriented database systems (OODBs). Rules are provided to transform the structural part of an OODB scheme to an equivalent relational scheme to provide relational users with a relational view of the OODB scheme. A mechanism based on a relational predicate graph and an OODB predicate graph is provided to translate relation... View full abstract»

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  • Object queries over relational databases: Language, implementation, and applications

    Publication Year: 1993, Page(s):71 - 80
    Cited by:  Papers (3)  |  Patents (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (912 KB)

    A query language called the Concise Object Query Language (COQL) is described. COQL is unique in its conciseness, in its support of inheritance, and in the capabilities it provides for defining application-specific structures. The COQL-to-SQL translation, its implementation on top of a commercial relational DBMS, and the ways in which COQL can be used for constructing application-specific views fo... View full abstract»

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  • Parallel database systems: The case for shared-something

    Publication Year: 1993, Page(s):460 - 465
    Cited by:  Papers (6)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    Parallel database systems are becoming the primary application of multiprocessor computers. The reason for this is that they can provide high-performance and high-availability database support at a much lower price than do equivalent mainframe computers. The traditional shared-memory, shared-disk, and shared-nothing architectures of parallel database systems are compared, based on the following di... View full abstract»

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  • Feature-based retrieval of similar shapes

    Publication Year: 1993, Page(s):108 - 115
    Cited by:  Papers (16)  |  Patents (34)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    A shape similarity-based retrieval method for image databases that supports a variety of queries is proposed. It is flexible with respect to the choice of feature and definition of similarity and is implementable using existing multidimensional point access methods. A prototype system that handles the problems of distortion and occlusion is described. Experiments with one specific point access met... View full abstract»

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  • Data quality requirements analysis and modeling

    Publication Year: 1993, Page(s):670 - 677
    Cited by:  Papers (33)  |  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    A set or premises, terms, and definitions for data quality management are established, and a step-by-step methodology for defining and documenting data quality parameters important to users is developed. These quality parameters are used to determine quality indicators about the data manufacturing process, such as data source creation time, and collection method, that are tagged to data items. Giv... View full abstract»

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  • Deriving integrity maintaining triggers from transition graphs

    Publication Year: 1993, Page(s):22 - 29
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (684 KB)

    Methods for deriving constraint maintaining triggers from dynamic integrity constraints represented by transition graphs are presented. The methods reduce integrity monitoring to checking changing static conditions according to life cycle situations. Thus, triggers have to be generated from these graphs, which depend not only on the operations that have occurred in a transaction, but also on the s... View full abstract»

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  • Unification of temporal data models

    Publication Year: 1993, Page(s):262 - 271
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (880 KB)

    A conceptual temporal data model that captures the time-dependent semantics of data while permitting multiple data models at the representation level is described. A conceptual notion of a bitemporal relation in which tuples are stamped with sets of two-dimensional chronons in transaction-time/valid-time space is defined. A tuple-timestamped first normal form representation is introduced to show h... View full abstract»

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  • Efficient support of historical queries for multiple lines of evolution

    Publication Year: 1993, Page(s):319 - 326
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    A general framework for solving multiple-line history queries is presented. The authors address two important historical queries in this environment: the vertical query and the horizontal query. The vertical query enables a design team to find what its design was at a past instant on its own path of evolution, while the horizontal query provides a design team with the designs of relevant teams at ... View full abstract»

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  • Adaptive blocks rearrangement

    Publication Year: 1993, Page(s):182 - 189
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (644 KB)

    An adaptive technique for reducing disk seek times is described. The technique copies frequently referenced blocks from their original locations to reserved space near the center of the disk. Reference frequencies need not be known in advance. Instead, they are estimated by monitoring the stream of arriving requests. Results of trace-driven simulations show that seek times can be cut in half by co... View full abstract»

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  • A framework for declarative updates and constraint maintenance in object-oriented databases

    Publication Year: 1993, Page(s):391 - 398
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (660 KB)

    A framework for supporting ad-hoc declarative update requests in an object-oriented database (OODB) while maintaining database consistency and atomicity of update requests is described. The framework is based on the emulation of classic update methods in an OODB by a controlled, active, and user-transparent interaction between a predefined set of elementary updates and a set of integrity methods d... View full abstract»

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