Results 1 - 10 of 4,893

Composite event specification in active databases: Model and implementation

by N. H. Gehani, H. V. Jagadish , 1992
"... Active database systems require facilities to specify triggers that fire when specified events occur. We propose a language for specifying composite events as eveti expressions, formed using event operators and events (primitive or composite). An event expression maps an event history to anothe-r ev ..."
Abstract - Cited by 179 (4 self) - Add to MetaCart
Active database systems require facilities to specify triggers that fire when specified events occur. We propose a language for specifying composite events as eveti expressions, formed using event operators and events (primitive or composite). An event expression maps an event history to anothe-r

Efficient Filtering of Composite Events

by Annika Hinze - IN PROC. OF THE BRITISH NATIONAL DATABASE CONFERENCE , 2003
"... Event Notification Services (ENS) are used in various applications such as remote monitoring and control, stock tickers, traffic control, or facility management. The performance issues of the filtering of primitive events has been widely studied. However, for a growing number of applications, the ra ..."
Abstract - Cited by 14 (1 self) - Add to MetaCart
, the rapid notification about the occurrence of composite events is an important issue. Currently, the detection of composite events requires a second filtering step after the identification of the primitive components. In this paper, we propose a single-step method for the filtering of composite events

Composite Events for XML

by Martin Bernauer, Gerti Kappel, Gerhard Kramler , 2004
"... to automatically react to occurred events. Aside from proprietary approaches for enriching XML with active behavior, the W3C standardized the Document Object Model (DOM) Event Module for the detection of events in XML documents. When using any of these approaches, however, it is often impossible to ..."
Abstract - Cited by 21 (0 self) - Add to MetaCart
to decide which event to react upon because not a single event but a combination of multiple events, i.e., a composite event determines a situation to react upon. The paper presents the first approach for detecting composite events in XML documents by addressing the peculiarities of XML events which

Primitive and Composite Events in NAOS

by Christine Collet, Thierry Coupaye - In actes des 12e Journees Bases de Donneees Avancees , 1996
"... This paper focuses on the event component of the NAOS(Native Active Object System) active rule system. It first gives an overview of the system and then presents the main concepts of the event model proposed for describing primitive and composite events. ..."
Abstract - Cited by 4 (2 self) - Add to MetaCart
This paper focuses on the event component of the NAOS(Native Active Object System) active rule system. It first gives an overview of the system and then presents the main concepts of the event model proposed for describing primitive and composite events.

Expressing Composite Events In Infosleuth

by Susan D. Urban, Amy Unruh, Gale Martin, Marian Nodine , 1998
"... This report describes the design of a composite event language for InfoSleuth. The language has adopted operators that have been introduced in the literature for composite event expression. We have enhanced the use of the operators with filters for expressing constraints on occurrences of di#erent e ..."
Abstract - Cited by 1 (0 self) - Add to MetaCart
This report describes the design of a composite event language for InfoSleuth. The language has adopted operators that have been introduced in the literature for composite event expression. We have enhanced the use of the operators with filters for expressing constraints on occurrences of di

Composite Events for Network Event Correlation

by G. Liu, A.K. Mok, E.J. Yang - In Sloman et al
"... With the increasing complexity of enterprise networks and the Internet, event correlation is playing an increasingly important role in network as well as integrated system management systems. Even though the timing of events often reveals important diagnostic information about event relationships an ..."
Abstract - Cited by 45 (0 self) - Add to MetaCart
and should therefore be represented in event correlation rules or models, most extant approaches lack a formal mechanism to define complex temporal relationships among correlated events. In this paper, we discuss the formal use of composite events for event correlation and present a composite event

Anatomy of a Composite Event Detector

by S. Chakravarthy, V. Krishnaprasad, E. Anwar, S. -k Kim , 1993
"... Making a database system active entails developing an expressive event specification language with well-defined semantics, algorithms for the detection of composite events, and an architecture for an event detector along with its implementation. This paper presents Snoop as the event specification l ..."
Abstract - Cited by 25 (2 self) - Add to MetaCart
Making a database system active entails developing an expressive event specification language with well-defined semantics, algorithms for the detection of composite events, and an architecture for an event detector along with its implementation. This paper presents Snoop as the event specification

Querying Composite Events for Reactivity on the Web

by François Bry, Michael Eckert, Paula-Lavinia Pătrânjan
"... Reactivity, the ability to detect events and respond to them automatically through reactive programs, is a key requirement in many present-day information systems. Work on Web Services reflects the need for support of reactivity on a higher abstraction level than just message exchange by HTTP. This ..."
Abstract - Cited by 18 (17 self) - Add to MetaCart
. This article presents the composite event query facilities of the reactive rule-based programming language XChange. Composite events are important in the dynamic world of the Web where applications, or Web Services, that have not been engineered together are composed and have to cooperate by exchanging event

COMPOSE A System For Composite Event Specification and Detection

by Narain Gehani, H. V. Jagadish, Oded Shmueli - in Book chapter in Advanced Database Concepts and Research Issues , 1994
"... Triggers, which make databases active, are specified as event-action pairs. We have developed a model for specifying composite events, which are events that are composed from simple events or from other composite events. Composite events are specified as event expressions. The occurrence of a compos ..."
Abstract - Cited by 33 (1 self) - Add to MetaCart
Triggers, which make databases active, are specified as event-action pairs. We have developed a model for specifying composite events, which are events that are composed from simple events or from other composite events. Composite events are specified as event expressions. The occurrence of a

The Ponder Policy Specification Language

by Nicodemos Damianou , Naranker Dulay , Emil Lupu , Morris Sloman - LECTURE NOTES IN COMPUTER SCIENCE , 2001
"... The Ponder language provides a common means of specifying security policies that map onto various access control implementation mechanisms for firewalls, operating systems, databases and Java. It supports obligation policies that are event triggered conditionaction rules for policy based management ..."
Abstract - Cited by 499 (28 self) - Add to MetaCart
The Ponder language provides a common means of specifying security policies that map onto various access control implementation mechanisms for firewalls, operating systems, databases and Java. It supports obligation policies that are event triggered conditionaction rules for policy based management
Results 1 - 10 of 4,893