Searching for authors named "Anthony Tomasic" – sorted by Relevance.
55 documents found, showing 1 through 10.
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Determining Correct View Update Translations via Query Containment
- …Given an intensional database (IDB) and an extension database (EDB), the view update problem translates updates on the IDB into updates on the EDB. One approach to the view update problem uses a translation langauge to specify the meaning of a view update. In this paper we prove properties of a tran…
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Correct View Update Translations via Containment
- …One approach to the view update problem for deductive databases proves properties of translations - that is, a language specifies the meaning of an update to the intensional database (IDB) in terms of updates to the extensional database (EDB). We argue that the view update problem should be viewed a…
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Linking Messages and Form Requests
- …Large organizations with sophisticated infrastructures have large form-based systems that manage the interaction between the user community and the infrastructure. In many cases, when a user needs to complete a form to accomplish a task, the user e-mails a description of the task to the appropriate …
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Learning Information Intent via Observation
- …Workers in organizations frequently request help from assistants by sending request messages that express information intent: an intention to update data in an information system. Human assistants spend a significant amount of time and effort processing these requests. For example, human-resource as…
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Symmetric publish/subscribe via constraint publication
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Scaling Heterogeneous Databases and the Design of Disco
- …Access to large numbers of data sources introduces new problems for users of heterogeneous distributed databases. End users and application programmers must deal with unavailable data sources. Database administrators must deal with incorporating new sources into the model. Database implementors must…
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Unavailable Data Sources in Mediator Based Applications
- …We discuss the problem of unavailable data sources in the context of two mediator based applications. We discuss the limitations of existing system with respect to this problem and describe a novel evaluation model that overcomes these shortcomings. 1 Introduction Mediator systems are being deploye…
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Query Processing and Inverted Indices in Shared-Nothing Document Information Retrieval Systems
- …The performance of distributed text document retrieval systems is strongly in uenced by the organization of the inverted index. This paper compares the performance impact on query processing of various physical organizations for inverted lists. We present a new probabilistic model of the database an…
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Parachute Queries in the Presence of Unavailable Data Sources
- …Mediator systems are used today in a wide variety of unreliable environments. When processing a query, a mediator may try to access a data source which is unavailable. In this situation, existing systems either silently ignore unavailable data sources or generate an error. This behavior is inefficie…
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Caching and database scaling in distributed shared-nothing information retrieval systems
- …A common class of existing information retrieval system provides access to abstracts. For example Stanford University, through its FOLIO system, provides access to the INSPEC database of abstracts of the literature on physics, computer science, electrical engineering, etc. In this paper this databas…
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