Rules are objects too: A knowledge model for an active, object-oriented database system

Dayal, Umeshwar; Buchmann, Alejandro; McCarthy, Dennis R.

doi:10.1007/3-540-50345-5_9

Cited by 123 publications

(43 citation statements)

References 16 publications

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“…These events may be simple events or may themselves be the result of a previous composition. Composite events are expressed using an event algebra, such as those defined in HiPAC [43], Ode [65], SAMOS [44], and NAOS [66]. Such algebras require an order function between events to apply event operators (e.g., sequence), or to consume events.…”

Section: Event Compositionmentioning

confidence: 99%

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Event Handling for the Universal Enterprise

2005

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Current trends in the global economy are leading to inter-enterprise interactions and to new business models that depend on the timely notification of events and the reaction to them. In this paper we present a distributed reactive middleware that supports the proactive notification of events in heterogeneous environments. The infrastructure consists of a publish/subscribe notification mechanism and a reactive functionality. We represent events that may originate from heterogeneous sources together with their ontology-based context metadata to make them self-describing beyond the boundaries of the event source. We introduce the notion of concept-based addressing to publish/subscribe systems. Concept-based addressing allows us to express subscriptions to events according to different contexts than those of the published events and yet match them successfully. By using ontologies and context definitions consistently for events, notifications, subscriptions and reactions we provide the necessary support for event handling in global enterprises.

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Section: Event Compositionmentioning

confidence: 99%

“…This basic functionality is common fare in commercial DBMS today. In object-oriented systems, more general events were defined: temporal events, both absolute and relative, method invocation events, and user-defined events [43][44][45].…”

Section: (Re)active Functionalitymentioning

confidence: 99%

Event Handling for the Universal Enterprise

2005

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“…The redefinition of strategies is governed by the notion of admissible strategy [10,14]. Propagation rules are active; they are written with the formalism of ECA rules [3]. Figure 3 proposes a description of the propagation rules and strategies that allow the example of the instance of car (represented in Figure 2 The macroscopic approach is a technique allowing the most frequently needed complex object version mechanisms to be expressed simply.…”

Section: A Parameterized Propagation Mechanismmentioning

confidence: 99%

Complex object versioning

Oussalah

Urtado

1997

Notes on Numerical Fluid Mechanics and Multidisciplinary Design

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Abstract. Engineering applications require semantically rich data to be modeled and managed over time. Complex objects, meaning objects linked to other objects by structural and existential dependences, allow such data to be represented. Complex object versions track the evolution of complex objects over time or during a design process. This paper describes a complex object version management model that combines two approaches for the management of complex object versions, depending on the granularity of the versioned objects: the macroscopic and the microscopic levels. These two levels give the various categories of users the possibility to choose the complex object version management technique that is best adapted to their needs. Unlike existing models, this model allows all types of complex objects, at both class level and instance level, to be managed. Furthermore, the microscopic level is highly parameterized and the macroscopic level offers an easy-to-use interface to users.

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“…there is no consideration of different sensor types or interactions. There also exist a number of methods that are based on process algebra and composition logic [8], [9]. However, since these approaches were mainly developed for database systems, some important characteristics of sensor networks such as sensing activities or spatial and temporal properties have not been addressed.…”

Section: Introductionmentioning

confidence: 99%

MEDAL: A coMpact event description and analysis language for wireless sensor networks

Kapitanova

Son

2009

2009 Sixth International Conference on Networked Sensing Systems (INSS)

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Abstract-Event detection plays an important role in wireless sensor network (WSN) applications such as battlefield surveillance and habitat monitoring. However, effective approaches for specifying events in a sensor network remain a challenge. In this paper we present MEDAL, a formal event description language. MEDAL is a modified Petri net which provides a more compact formal language than its predecessor SNEDL. As a system analysis tool, MEDAL can capture the structural, spatial, and temporal properties of a complex event detection system, which can be used to assist system designers in identifying inconsistencies and potential problems. MEDAL can also perform case-specific analyses that can make the debugging phase easier. We present a case study as an example illustrating the features and effectiveness of MEDAL. We also describe an approach for simultaneous detection of multiple events in a single WSN.

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Rules are objects too: A knowledge model for an active, object-oriented database system

Cited by 123 publications

References 16 publications

Event Handling for the Universal Enterprise

Event Handling for the Universal Enterprise

Complex object versioning

MEDAL: A coMpact event description and analysis language for wireless sensor networks

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