Automatically assigned DDC number: 005758

Manually assigned DDC number: 005758

Number of references: 0

Title: Temporal Modules: An Approach Toward Federated Temporal Databases

Author:

Author:

Author:

Subject: X. Sean Wang,Sushil Jajodia,V. S. Subrahmanian Temporal Modules: An Approach Toward Federated Temporal Databases

Description: In a federated database environment, different constituents of the federation may use different temporal models or physical representations for the temporal information. This paper introduces a new concept, called a temporal module, to resolve these mismatches among the constituents. Intuitively, a temporal module hides the implementation details of a temporal relation by exposing its information only through two windowing functions: a function associating each time point with a set of tuples and a function linking each tuple to a set of time points. A calculus-style language is given to form queries on temporal modules. Temporal modules are then extended to resolve another type of mismatch among the constituents of a federation, namely, mismatch involving different time units (e.g., month, week and day) used in recording temporal information. Our solution to this mismatch relies on "information conversions" provided by each constituent. Specifically, a temporal module is extended to p...

Contributor: The Pennsylvania State University CiteSeer Archives

Publisher: unknown

Date: 1995-03-31

Pubyear: 1993

Format: ps

Identifier: http://citeseer.ist.psu.edu/140723.html

Source: http://www.cs.umd.edu/projects/hermes/publications/postscripts/sigmod93_2.ps

Language: en

Rights: unrestricted

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