Proceedings 15th International Conference on Data Engineering (Cat. No.99CB36337)

23-26 March 1999

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  • Proceedings 15th International Conference on Data Engineering (Cat. No.99CB36337)

    Publication Year: 1999
    Request permission for commercial reuse | PDF file iconPDF (412 KB)
    Freely Available from IEEE
  • Que Sera, Sera: The Coincidental Confluence of Economics, Business, and Collaborative Computing

    Publication Year: 1999, Page(s):2 - 3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB)

    Summary form only given. This presentation is an exploration of the next generation computing based on the confluence of radical and coincidental changes in economics, business, and technology. Whereas technology is a key enabler of change, it is and is the servant, not the master. Without a depth of understanding of this enabling role and the content in which technology serves, technology can be ... View full abstract»

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  • Database as an application integration platform

    Publication Year: 1999
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (37 KB)

    Summary form only given as follows. This paper describes critical features that should be provided by any platform for application integration. These features include message queuing, message filtering and data transformation. The integration of these features with a database makes for a powerful platform for application integration that is scalable, reliable, available and manageable. View full abstract»

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  • Business objects and application integration

    Publication Year: 1999
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (54 KB)

    Summary form only given as follows. Application integration addresses the need for diverse applications to be able to communicate with each other across application boundaries and across platform boundaries. Business objects extend the type system of relational databases to deal with the needs of application integration. The requirements of business application integration include event-based info... View full abstract»

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  • Policies in a resource manager of workflow systems: modeling, enforcement and management

    Publication Year: 1999
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (64 KB)

    Summary form only given. We are interested in Workflow Management Systems (WFMS), and particularly, in Resource Management (RM) of WFMS. A WFMS consists of coordinating executions of multiple activities, instructing who (resource) do what (activity) and when. The "when" part is taken care of by the workflow engine which orders the executions of activities based on a process definition. The "who" p... View full abstract»

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  • Data Mining from an Al Perspective

    Publication Year: 1999, Page(s): 186
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (75 KB)

    Summary form only given, as follows. Data Mining, or Knowledge Discovery in Databases as it is also called, is claimed as an offspring by three disciplines: databases, statistics, and the machine learning subfield of artificial intelligence. (The term originated in statistics with distinctly pejorative overtones - data mining was characterized as fossicking in data without a guiding model.) Statis... View full abstract»

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  • Fast approximate query answering using precomputed statistics

    Publication Year: 1999
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (10 KB)

    Summary form only given. The last few years have witnessed a significant increase in the use of databases for complex data analysis (OLAP) applications. These applications often require very quick responses from the DBMS. However, they also involve complex queries on large volumes of data. Despite significant improvement in database support for OLAP over the last few years, most DBMSs still fall s... View full abstract»

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  • Data warehouse maintenance under concurrent schema and data updates

    Publication Year: 1999
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (87 KB)

    Summary form only given. Data warehouses (DW) are built by gathering information from several information sources (IS) and integrating it into one repository customized to users' needs. ISs are typically owned by different information providers and hence are independent and autonomous. This implies they will update their data and schemas independently and without any concern for how this may affec... View full abstract»

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  • Author index

    Publication Year: 1999, Page(s):646 - 648
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    Freely Available from IEEE
  • Relative prefix sums: an efficient approach for querying dynamic OLAP data cubes

    Publication Year: 1999, Page(s):328 - 335
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (100 KB)

    Range sum queries on data cubes are a powerful tool for analysis. A range sum query applies an aggregation operation (e.g., SUM) over all selected cells in a data cube, where the selection is specified by providing ranges of values for numeric dimensions. Many application domains require that information provided by analysis tools be current or “near-current.” Existing techniques for r... View full abstract»

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  • Developing a DataBlade for a new index

    Publication Year: 1999, Page(s):314 - 323
    Cited by:  Papers (8)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (112 KB)

    In order to better support current and new applications, the major DBMS vendors are stepping beyond uninterpreted binary large objects, termed BLOBs, and are beginning to offer extensibility features that allow external developers to extend the DBMS with, e.g., their own data types and accompanying access methods. Existing solutions include DB2 extenders, Informix DataBlades, and Oracle cartridges... View full abstract»

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  • Optimizer and parallel engine extensions for handling expensive methods based on large objects

    Publication Year: 1999, Page(s):304 - 313
    Cited by:  Patents (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    Object-relational database systems allow users to define new types and functions. This typing extension allows structural semantics to be applied to new data types (non-SQL92 data types). However, defining new, large, complex objects within a tuple is not always practical. Practicality alone requires that large object data structures be used. This implies that predicate evaluation can be performed... View full abstract»

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  • Index merging

    Publication Year: 1999, Page(s):296 - 303
    Cited by:  Papers (11)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (96 KB)

    Indexes play a vital role in decision support systems by reducing the cost of answering complex queries. A popular methodology for choosing indexes that is adopted by database administrators as well as by automatic tools is: (a) consider poorly performing queries in the workload; (b) for each query, propose a set of candidate indexes that potentially benefits the query; and (c) choose a subset fro... View full abstract»

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  • Mobile agents for WWW distributed database access

    Publication Year: 1999, Page(s):228 - 237
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    The popularity of the Web as a universal access mechanism for network information has created the need for developing Web based DBMS client/server applications. However, the current commercial applet based methodologies for accessing database systems offer limited flexibility, scalability and robustness. We propose a new framework for Web based distributed access to database systems based on Java ... View full abstract»

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  • Integrating light-weight workflow management systems within existing business environments

    Publication Year: 1999, Page(s):286 - 293
    Cited by:  Papers (5)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1868 KB)

    Workflow management systems (WfMSs) support the efficient, largely automated execution of business processes. However, using a WfMS typically requires implementing the application's control flow exclusively by the WfMS. This approach is powerful if the control flow is specified and implemented from scratch, but it has severe drawbacks if a WfMS is to be integrated within environments with existing... View full abstract»

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  • Using Java and CORBA for implementing Internet databases

    Publication Year: 1999, Page(s):218 - 227
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1936 KB)

    We describe an architecture called WebFINDIT that allows dynamic couplings of Web accessible databases based on their content and interest. We propose an implementation using WWW, Java, JDBC, and CORBA's ORBs that communicate via the CORBA's IIOP protocol. The combination of these technologies offers a compelling middleware infrastructure to implement fluid-area enterprise applications. In additio... View full abstract»

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  • Enhancing semistructured data mediators with document type definitions

    Publication Year: 1999, Page(s):136 - 145
    Cited by:  Papers (7)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB)

    Mediation is an important application of XML. The MIX mediator uses Document Type Definitions (DTDs) to assist the user in query formulation and query processors in running queries more efficiently. We provide an algorithm for inferring the view DTD from the view definition and the source DTDs. We develop a metric of the quality of the inference algorithm's view DTD by formalizing the notions of s... View full abstract»

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  • Using codewords to protect database data from a class of software errors

    Publication Year: 1999, Page(s):276 - 285
    Cited by:  Papers (2)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (112 KB)

    Increasingly, for extensibility and performance, special-purpose application code is being integrated with database system code. Such application code has direct access to database system buffers and, as a result, the danger of data being corrupted due to inadvertent application writes is increased. Previously proposed hardware techniques to protect data from corruption required system calls, and ... View full abstract»

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  • Design and evaluation of disk scheduling policies for high-demand multimedia servers

    Publication Year: 1999, Page(s):592 - 599
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB)

    We propose and evaluate techniques to manage disk storage systems for multimedia document servers with constrained I/O resources. We also evaluate the requirements for the main memory to maintain desired levels of quality of presentation (QoP) for multiple users. This is achieved by attempting to minimize the number of tardy frames in end-to-end delivery of multimedia data. Inter-media and intra-m... View full abstract»

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  • A transparent replication of HTTP service

    Publication Year: 1999
    Cited by:  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (16 KB)

    We developed Web++, a prototype system based on user-transparent geographic replication which aims at improving the response time and the reliability of the HTTP service. Web++ extends the current Web client/server architecture with additional capabilities. The extension is provided via Java servlets at the server side and applets at the client side. The servlets pre-process the requested document... View full abstract»

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  • Mining optimized support rules for numeric attributes

    Publication Year: 1999, Page(s):206 - 215
    Cited by:  Papers (7)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (252 KB)

    Generalizes the optimized support association rule problem by permitting rules to contain disjunctions over uninstantiated numeric attributes. For rules containing a single numeric attribute, we present a dynamic programming algorithm for computing optimized association rules. Furthermore, we propose a bucketing technique for reducing the input size, and a divide-and-conquer strategy that improves... View full abstract»

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  • Multiple index structures for efficient retrieval of 2D objects

    Publication Year: 1999
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (28 KB)

    Many applications require the storage and management of large databases of 2D objects. One of the important functionalities required by all of these applications is the capability to find objects in a database that match a given object. We concentrate on whole matching queries, in which a query object is compared with a set of objects to find the ones that are either exactly identical or similar t... View full abstract»

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  • Efficient time series matching by wavelets

    Publication Year: 1999, Page(s):126 - 133
    Cited by:  Papers (88)  |  Patents (25)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB)

    Time series stored as feature vectors can be indexed by multidimensional index trees like R-Trees for fast retrieval. Due to the dimensionality curse problem, transformations are applied to time series to reduce the number of dimensions of the feature vectors. Different transformations like Discrete Fourier Transform (DFT) Discrete Wavelet Transform (DWT), Karhunen-Loeve (KL) transform or Singular... View full abstract»

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  • Tape-disk join strategies under disk contention

    Publication Year: 1999, Page(s):552 - 559
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2132 KB)

    Large-scale data warehousing, data mining and scientific applications require the analysis of terabytes of factual data accumulated over long periods of time. Tape libraries are suitable for storing such mass data. The online analytical processing (OLAP) of this data typically leads to long-running aggregation queries joining the tape-resident fact relations with disk-resident dimension relations.... View full abstract»

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  • Similarity searching in text databases with multiple field types

    Publication Year: 1999
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (12 KB)

    Similarity searching in text databases with multiple field types is still an open problem. We experimented with CORDIS and we evaluated the effectiveness of many text retrieval methods in terms of precision, recall and ranking quality View full abstract»

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